Isoetes [SEP] taxon rank
Isoetes beestonii


Isoetes beestonii is the oldest known species of the living quillwort genus from the latest Permian of New South Wales and Queensland. Originally considered earliest Triassic, it is now known to be latest Permian in age, immediately before the Permian Triassic mass extinction. "Isoetes beestonii" is preserved as whole plants in life position within bedding planes, and presumably lived as an early successional weed in lake and pond sedimentary environments, like living "Isoetes". Its leaves were wider and more succulent than modern species of "Isoetes". Like
19608012
Taxonomic rank


not to say that a taxon at any other rank may not be sharply defined, or that any species is guaranteed to be sharply defined. It varies from case to case. Ideally, a taxon is intended to represent a clade, that is, the phylogeny of the organisms under discussion, but this is not a requirement. A classification in which all taxa have formal ranks cannot adequately reflect knowledge about phylogeny. Since taxon names are dependent on ranks in traditional Linnaean systems of classification, taxa without ranks cannot be
17667712
Isoetes sinensis


Isoetes sinensis, the narrow quillwort, is a species of plant in the family Isoetaceae. "Isoetes sinensis" is native to China and Korea. Its natural habitat is swamps. It is threatened by habitat loss. This species is native to China in the areas of Anhui, Jiangsu, and Zhejiang. "Isoetes sinensis" is recorded to be a critically endangered species due to industrial development and agricultural expansion. This species occupies freshwater environments and within terrestrial systems. In order to help conserve this species, amplified fragment length polymorphisms
21989454
Isoetes engelmannii


Isoetes engelmannii, commonly known as Engelmann's quillwort or Appalachian quillwort (not to be confused with the newly described "Isoetes appalachiana"), is an aquatic pteridophyte and is the most widely distributed species of its genus in eastern North America. Its range extends from Ontario in the north, south to Florida and west Arkansas and Missouri. It can be found from April to October in temporary pools, bogs, marshes, stream edges, swamps and along wet roadsides. "Isoetes engelmannii" is an emergent aquatic perennial pteridophyte.
21067354
Form (botany)


In botanical nomenclature, a form ("forma", plural "formae") is one of the "secondary" taxonomic ranks, below that of variety, which in turn is below that of species; it is an infraspecific taxon. If more than three ranks are listed in describing a taxon, the "classification" is being specified, but only three parts make up the "name" of the taxon: a genus name, a specific epithet, and an infraspecific epithet. The abbreviation "f." or the
7125380
Infraspecific name


In botany, an infraspecific name is the scientific name for any taxon below the rank of species, i.e. an infraspecific taxon. (A "taxon", plural "taxa", is a group of organisms to be given a particular name.) The scientific names of botanical taxa are regulated by the "International Code of Nomenclature for algae, fungi, and plants" (ICN). This specifies a 'three part name' for infraspecific taxa, plus a 'connecting term' to indicate the rank of the name
20320028
Isoetopsida


The Isoetopsida is a class of Lycopodiophyta. All extant species belong to the genus "Selaginella" in the order Selaginellales or to the genus "Isoetes" in the order Isoetales. In the past, members of this group sometimes have been placed in the classes Isoetopsida, Selaginellopsida, or Lycopodiopsida. There are c. 700 species of "Selaginella" and 140-150 species of "Isoetes", with a cosmopolitan distribution, but often scarce to rare. Both orders are heterosporous. Some botanists split "Isoetes" by separating two
985087
Taxon


In biology, a taxon (plural taxa; back-formation from "taxonomy") is a group of one or more populations of an organism or organisms seen by taxonomists to form a unit. Although neither is required, a taxon is usually known by a particular name and given a particular ranking, especially if and when it is accepted or becomes established. It is not uncommon, however, for taxonomists to remain at odds over what belongs to a taxon and the criteria used for inclusion. If a taxon is given
20416048
Geography of Hunan


-level protected plants: Isoetes sinensis, Davidia involucrata, Cycad, Ginkgo, Cathaya, Metasequoia glyptostroboides, Scaly-sided merganser, Bretschneidera and Brasenia. Hunan has been hailed as the "hometown of non-ferrous metal" and "hometown of nonmetallic minerals". There are more than 141 species of minerals in Hunan. Antimony of Hunan is ranked No. 1 in the world. Bismuth, rubidium, anthracite, realgar, fluorite, sepiolite, baryte are ranked No. 1 in China. Manganese, vanadium, rhenium
12909705
Isoetes


Isoetes, commonly known as the quillworts, is a genus of plants in the family Isoetaceae. They are lycopods and the only genus in Isoetaceae. There are currently 192 recognized species, with a cosmopolitan distribution but with the individual species often scarce to rare. Some botanists split the genus, separating two South American species into the genus "Stylites", although molecular data place these species among other species of "Isoetes", so "Stylites" does not warrant taxonomic recognition. The name of the genus may also be spelled
18520970
Name-bearing type


group" ranks consist of just the species and subspecies. (Note: a "species group" defined as a taxon, rather than as a category of ranks, has an unofficial rank, one of several such ranks between the subgenus and species levels sometimes used by zoologists in taxa with many species; see Taxonomic rank.) The name-bearing type of a species-group taxon (hereafter "species" for brevity) is an actual specimen or set of specimens; the "Code" recommends that great care should
5809726
Jordan Pond


Isoetes macróspora var. heteróspora" (or "Isoetes heterospora") but is now considered to be a synonym for "Isoetes lacustris", which is found in both North America and Europe. Four other quillwort species are also found in the lake, along with three species of pondweed, two species each of rushes, bur-reeds, and carnivorous bladderworts, and at least six other species of plants. Fish species in the lake include landlocked Atlantic salmon, lake trout, brook trout, rainbow smelt, four species of
10087725
Isoetes


are difficult to identify and their phylogeny is disputed. Vegetative characters commonly used to distinguish other genera, such as leaf length, rigidity, color, or shape are variable and depend on habitat. Most classification systems for "Isoetes" rely on spore characteristics, which make species identification nearly impossible without microscopy. Many species, such as the Louisiana quillwort and the mat-forming quillwort, are endangered species. Several species of "Isoetes" are commonly called Merlin's grass, especially "I. lacustris", but also the endangered
18520975
Isoetes butleri


Isoetes butleri, commonly known as limestone quillwort, is a species of plant in the quillwort family, a member of the fern allies. It is native to the eastern United States, where it is scattered and local. It is found almost exclusively on seasonally wet alkaline soils. Common habitats include rocky prairies and glades, most often over limestone. This species is inconspicuous and easily overlooked, due to its superficial similarity to a vegetative grass or sedge. The leaves of "Isoetes butleri" die back at the end of spring
3138905
Isoetes eludens


searches in recent years in the area for new quillwort species. The genus "Isoetes", the quillworts, are related to ferns, with fossil evidence dating back more than 150 million years. "Isoetes eludens" grows only tall, with root hairs growing under the soil surface. It has up to twelve green sporophylls, or leaves that produce spores, growing in a tight cluster. Like other quillworts, the sporophylls are hollow and rounded like a quill. The spore-producing part of the leaf is at the base
5399962
Isoetes eludens


, producing both megaspores and microspores. "Isoetes eludens" was found in a single !gau, or seasonal rock pool, that is wide and deep. The pool is on a granite gneiss ridge at elevation in the Kamiesberg Mountains, Namaqualand, South Africa. Most quillworts are found growing in permanent lakes or bogs, with a few rare species growing in temporary pools. "Isoetes eludens" has the ability to survive during dry periods as dormant spores, or during damp periods with corms or submerged stems under the mud.
5399963
List of endangered plants in North America


" (serpent woodfern)br "Elaphoglossum serpens" (no common name)br "Isoetes louisianensis" (Louisiana quillwort)br "Isoetes melanospora" (black spored quillwort)br "Isoetes tegetiformans" (mat-forming quillwort)br "Marsilea villosa" (Ihi`ihi) "Cladonia perforata" (Florida perforate cladonia) br "Gymnoderma lineare" (rock gnome lichen) "Abronia macrocarpa" (large-fruited sand verbena)br "Abutilon eremitopetalum" (hidden-petal Indian mallow)br "Abutilon menziesii" (koʻoloaʻula)br "Abutilon sandwicense" (greenflower Indian mallow)br "Acaena exigua"
4479052
Botanical nomenclature


taxon (see correct name) and if a new name may (or must) be coined. Plant taxonomy is an empirical science, a science that determines what constitutes a particular taxon (taxonomic grouping, plural: taxa): e.g. "What plants belong to this species?" and "What species belong to this genus?". The definition of the limits of a taxon is called its 'circumscription'. For a particular taxon, if two taxonomists agree exactly on its circumscription, rank and position (i.e. the
15041079
Synonym (taxonomy)


of Zoological Nomenclature", synonyms are different scientific names of the same taxonomic rank that pertain to that same taxon. For example, a particular species could, over time, have had two or more species-rank names published for it, while the same is applicable at higher ranks such as genera, families, orders, etc. In each case, the earliest published name is called the senior synonym, while the later name is the junior synonym. In the case where two names for the same taxon have been published
3098371
One Rank, One Pension


and 85 Indian Military Academy; and officers from the 14 Army Education Course; and twenty five officers and their families came from Jaipur. The movement continues to gain momentum, and perceptible increase in support and participation by former high-ranking officers of the armed forces, from Lt generals, Admirals, air marshals, Group Captains, and Colonels. Old veterans included Sep Ram Kishan, 93 years, Armoured Corp veteran of World War II; Sep Ram Bharose Yadav, 85 years, a blind veteran of 72 Medium Artillery;
8649907
PhyloCode


content of a taxon, other than the type, is not specified by the rank-based codes. In contrast, under phylogenetic nomenclature, the content of taxa are delimited using a definition that is based on phylogeny (i.e., ancestry and descent) and uses specifiers (e.g., species, specimens, apomorphies) to indicate actual organisms. The formula of the definition indicates an ancestor. The defined taxon, then, is that ancestor and all of its descendants. Thus, the content of a phylogenetically defined taxon relies on
4227015
Taxonomic rank


given names. Alternative approaches, such as using circumscriptional names, avoid this problem. There are no rules for how many species should make a genus, a family, or any other higher taxon (that is, a taxon in a category above the species level). It should be a natural group (that is, non-artificial, non-polyphyletic), as judged by a biologist, using all the information available to them. Equally ranked higher taxa in different phyla are not necessarily equivalent (e.g., it
17667713
Phylogenetic nomenclature


Phylogenetic nomenclature, often called cladistic nomenclature, is a method of nomenclature for taxa in biology that uses phylogenetic definitions for taxon names as explained below. This contrasts with the traditional approach, in which taxon names are defined by a "type", which can be a specimen or a taxon of lower rank, and a description in words. Phylogenetic nomenclature is currently not regulated, but the "International Code of Phylogenetic Nomenclature" ("PhyloCode") is intended to regulate it once it is ratified. Phylogenetic nomenclature ties names
4744909
Sarracenia rosea


this taxon in a 1993 issue of "Rhodora", the journal of the New England Botanical Club. Schnell decided to place this taxon at the rank of variety below subsp. "venosa" as "S. purpurea" var. "burkii", honoring Louis Burk as Wherry had suggested 60 years earlier. In 1999, however, botanists Robert Naczi, then a professor of biology at Northern Kentucky University, and Frederick and Roberta Case elevated the variety to species rank, naming it "Sarracenia rosea". They compiled morphological
4498748
Macrostomida


The Macrostomida are a taxon of small basal free-living flatworms (Turbellaria, Platyhelminthes), which inhabit freshwater, brackish, and marine environments. The taxon name was coined by Josef Meixner (1924). There are currently about 260 named species in this taxon. As is the case for many other taxa, the taxonomic rank of Macrostomida is not very clear. Macrostomidans are small (~0.5 to 5 mm in length), and generally highly transparent microturbellarians, usually round in cross section, and with only the largest forms
13717906
Type (biology)


specimens. The type of a genus or subgenus is a species. The type of a suprageneric taxon (e.g., family, etc.) is a genus. Names higher than superfamily rank do not have types. A "name-bearing type" is a specimen or image that "provides the objective standard of reference whereby the application of the name of a nominal taxon can be determined." Although in reality biologists may examine many specimens (when available) of a new taxon before writing an official published species description,
4362871
Correct name


there are two or more legitimate names for the same taxon (with the same circumscription, position and rank), then the correct name is the one which has priority, i.e. it was published earliest, although names may be conserved if they have been very widely used. Validly published names other than the correct name are called synonyms. Since taxonomists may disagree as to the circumscription, position or rank of a taxon, there can be more than one correct name for a particular plant. These may also be called synonyms.
19338400
Banksia aquilonia


geographically distinct from other infraspecific taxa. They also noted that there were no intermediate plants between what was then known as "B. integrifolia" var. "aquilonia" and other populations of "B. integrifolia". On this basis they would have liked to promote it to species rank, but did not because their inferred phylogeny suggested that this taxon arose from within "B. integrifolia". They were unwilling to render "B. integrifolia" paraphyletic by elevating this taxon to species rank, and they were equally unwilling to elevate all four
21331511
Drosera gigantea


geniculata", that grows to tall in black sandy soils near Perth and to its south. Jan Schlauer disagreed with Marchant and Lowrie's decision to give the new taxon a rank of subspecies and thus published a new combination of the taxon at the rank of variety in a 1996 issue of the "Carnivorous Plant Newsletter". He argued that subspecies should be reserved for those occasions where allopatric, or geographically isolated, speciation occurred and varieties are best used in cases where sympatric speciation is suspected. Others disagree with this assessment,
2758435
Anaspidea


somewhat resemble the ears of a hare. Many older textbooks and websites refer to this suborder as Anaspidea. The original author Paul Henri Fischer described the taxon Anaspidea at unspecified rank above family. In 1925 Johannes Thiele established the taxon Anaspidea as a suborder. Since the taxon Anaspidea was not based on an existing genus, this name is no longer available according to the rules of the ICZN. Anaspidea has been replaced in the new Taxonomy of the Gastropoda (Bouchet & Rocroi, 2005) by the clade Aplysiomorpha. The scientific name
4362472
Phylogenetic nomenclature


rank changed, even if it has precisely the same members (i.e. the same circumscription); and it is logically inconsistent with all taxa being monophyletic. Especially in recent decades (due to advances in phylogenetics), taxonomists have named many "nested" taxa (i.e. taxa which are contained inside other taxa). No system of nomenclature attempts to name every clade; this would be particularly difficult in traditional nomenclature since every named taxon must be given a lower rank than any named taxon in which it is nested, so the
4744916
Synonym (taxonomy)


other purposes, if a researcher is interested in consulting or compiling all currently known information regarding a taxon, some of this (including species descriptions, distribution, ecology and more) may well have been published under names now regarded as outdated (i.e., synonyms) and so it is again useful to know a list of historic synonyms which may have been used for a given current (valid) taxon name. Objective synonyms refer to taxa with the same type and same rank (more or less the same taxon, although circumscription
3098374
Isoetes


"Isoëtes". The diaeresis (two dots over the e) indicate that the o and the e are to be pronounced in two distinct syllables. Including this in print is optional; either spelling ("Isoetes" or "Isoëtes") is correct. Quillworts are mostly aquatic or semi-aquatic in clear ponds and slow-moving streams, though several (e.g. "I. butleri", "I. histrix" and "I. nuttallii") grow on wet ground that dries out in the summer. The Quillworts are
18520971
Crassulacean acid metabolism


the day. CAM photosynthesis is also found in aquatic species in at least 4 genera, including: "Isoetes", "Crassula", "Littorella", "Sagittaria", and possibly "Vallisneria", being found in a variety of species e.g. "Isoetes howellii", "Crassula aquatica". These plants follow the same nocturnal acid accumulation and daytime deacidification as terrestrial CAM species. However, the reason for CAM in aquatic plants is not due to a lack of available water, but a limited supply of .
2230281
Isoetes toximontana


Isoetes toximontana (Gifberg quillwort) is a plant species native to the Northern Cape and Western Cape regions of South Africa. It is known from only 3 sites. The type locality is on the slopes of Gifberg, a mountain forming part of the eastern boundary of the Olifants River Valley. The name "Gifberg" means "poison mountain"; this is in reference to a poisonous tree called "gifboom", "Euphorbia virosa", that is endemic to the area. The specific epithet ""toximontana"" is
8584778
Lobelia dortmanna


at depths of less than 1 metre. It often grows with other isoetids such as "Littorella uniflora", "Isoetes lacustris", "Isoetes echinospora" and "Subularia aquatica". It is regarded as an indicator of infertile and relatively pristine shoreline wetlands. Consequently, it is a species that can be put at risk by eutrophication and is used as an indicator species of relatively clear water and the possible occurrence of other less obvious isoetid species.. Such lakes are therefore often referred to as Lobelian lakes, as a specific
304279
Pleuromeia


in "Pleuromeia" is comparable to that of "Isoetes" and substantiates the assumed close relationship between the Pleuromeiaceae and the Isoetaceae. Dense populations of "Pleuromeia" hardly allowing for other species, are recorded around the world from habitats ranging from semi-arid to tidal. It has been suggested that "Sadovnikovia" (Kungurian) is the common ancestor of both the Isoetaceae and the Pleuromeiaceae. The earliest species of the extant genus "Isoetes" is known from the Lower Triassic, its extinct sister genus "Annalepis" occurs
8206675
World Qualification Series (2009)


18 - Aug 23" 30th Anniversary of the Lacanau Pro and good conditions this year. Surf, concerts, events scheduled. Check out the video for a summary of the event http://vimeo.com/6994555 "Aug 25 - Aug 30" "Sep 01 - Sep 06" "Sep 01 - Sep 06" "Sep 04 - Sep 06" "Sep 09 - Sep 12" "Sep 10 - Sep 13" "Sep 08 - Sep 13" "Sep 15 - Sep 20" "Sep 16 - Sep 22" "Sep
1986943
Isoetes lacustris


Isoetes lacustris (lake quillwort or Merlin's grass) is a boreal quillwort native on both sides of the northern Atlantic Ocean. In Europe, it is distributed from Poland west to northeastern France, throughout Scandinavia, the west and north of the British Isles, the Faroe Islands and Iceland. In the North America, it occurs in the New England states of Maine, Vermont, New Hampshire Rhode Island and Massachusetts, and in Canada in provinces of New Brunswick and Nova Scotia. It was discovered by Johannes Reinke. The lake
16927378
Isoetes engelmannii


and measure 400 to 560 μm in diameter. Their texture is reticulate (i.e. net-like) and the lamellate ridges are unbroken. The girdle that runs between these ridges is obscured by the heavy reticulation. The microspores are grey in colour, measure 20 to 30 μm in diameter, and are smooth to papillose (i.e. with minute projections) in texture. The spores mature in the summer. The chromosome number is 2n = 22. "Isoetes engelmannii" is widely distributed in eastern North America, more so than any
21067356
Isoetes × eatonii


Eaton's quillwort (Isoetes" × "eatonii) is a cross between "I. engelmannii" and "I. tenella". It can be found in ponds and slow moving rivers in Canada or in several New England states. In Canada, it has only been found in the Severn River in Ontario. In the United States, it has been found in Pennsylvania, New Jersey, and New York. It bears 12-100 long yellowish green leaves, each fine, soft, and 8 to 45 centimeters long. The
22150616
Isoetes eludens


Isoetes eludens is an aquatic plant in the genus commonly known as quillwort that is native to the Kamiesberg Mountains in Namaqualand, South Africa. So far it is known to grow only in a single !gau (gnamma), a small temporary pool formed in a hollowed out area of granite rock. It has likely been growing in that region for millions of years, but was only discovered in 2007 and described in 2009. The specific epithet "eludens" refers to the fact that it eluded discovery, in spite of several
5399961
Isoetes eludens


There is no conservation rating given by the IUCN for "Isoetes eludens"—Kew Botanical Gardens officials are recommending it be classified as Vulnerable. Further exploration has not turned up any more instances of the plant growing in the region, outside of the one rock pool. If the only location is the one site, then it could be threatened by a single human impact. However, the pool is in a remote area with little vegetation, so it is not as threatened by the more common impacts such as sheep grazing and other human activities
5399964
List of 1982–83 NBA season transactions


1982 Oct 2, 1982 Oct 1, 1982 Sep 30, 1982 Sep 29, 1982 Sep 28, 1982 Sep 27, 1982 Sep 24, 1982 Sep 22, 1982 Sep 20, 1982 Sep 19, 1982 Sep 18, 1982 Sep 17, 1982 Sep 15, 1982 Sep 14, 1982 Sep 13, 1982 Sep 10, 1982 Sep 9, 1982 Sep 7, 1982 Sep 2, 1982 Sep 1, 1982 Aug 31, 1982 Aug 27, 1982 Aug 26, 1982 Aug 16, 1982 Aug 8,
557049
Abraham Halpern


in Royal Canadian Naval Volunteer Reserve from Sep. 24, 1942 to Nov. 30, 1945 in European, North Atlantic, and Pacific theatres. Rank on discharge: Petty Officer. Served in Royal Canadian Navy, 1953-1957, as follows: Medical Officer, R.C.N. Hospital, Esquimalt, BC, July to Nov., 1953. Medical Officer, H.M.C.S. "Cayuga", Nov., 1953 to Feb., 1955 - Far East (Korea). Medical Officer, R.C.N. Hospital, Cornwallis, NS, Apr., 1955 to Sep.,
12498700
Isoetes louisianensis


The Louisiana quillwort (Isoetes louisianensis) is a small, grass-like aquatic plant of the family Isoetaceae. It is "one of the rarest quillworts in North America." It occurs in only five locations in St. Tammany and Washington Parishes of Louisiana and some spots in southern Mississippi (United States). It is federally listed as an endangered species, partly due to its highly restricted range. The Louisiana quillwort occurs predominantly on sand and gravel bars on small to medium-sized streams. These plants live for periods underwater
1075335
Eoparargyractis plevie


Eoparargyractis plevie is a moth in the Crambidae family. It was described by Harrison Gray Dyar Jr. in 1917. It is found in North America, where it has been recorded from Florida, Maine, Massachusetts, New Hampshire, New York, Nova Scotia, Quebec and South Carolina. Adults have been recorded on wing from April to October. The larvae are aquatic and have been recorded feeding on "Lobelia dortmanna", "Isoetes tuckermani" and "Isoetes muricata". They have a yellow head. Full-grown larvae
11424443
Isoetes


and female sporangia, protected by a thin, transparent covering (velum), which is used diagnostically to help identify quillwort species. They are heterosporous. Quillwort species are very difficult to distinguish by general appearance. The best way to identify them is by examining their megaspores under a microscope. Moreover, habitat, texture, spore size, and velum provide features that will distinguish Isoëtes taxa. Compared to other genera, "Isoetes" is poorly known. Even after studies with cytology, scanning electron microscopy, and chromatography, species
18520974
Isoetes howellii


Howell's quillwort (Isoetes howellii) is a species of quillwort, a type of lycopod. It is an aquatic plant native to western North America and grows in wet habitats such as vernal pools. It produces 5 to 28 pointed, cylindrical, bright green leaves that can reach 30 centimeters in length. The velum covers roughly one third of the spherical sporangia, which is 6 millimeters long. The ligule is in the shape of an elongated triangle. The megaspores are 420 to 610 micrometers in diameter. The coarse microspores are
19914911
Isoetes nuttallii


Nuttall's quillwort (Isoetes nuttallii) is a species of quillwort, a type of lycopod. It is native to shallow waters and other wet habitats of western North America from British Columbia to California. It produces up to 60 pointed, cylindrical, green to gray-green leaves, each 7 to 17 centimeters long. The velum completely covers the spherical sporangia, which are 5 millimeters long and 1.5 millimeters wide. The ligule is small and triangular. The megaspores are 400 to 500 micrometers in diameter. The microspores, which
19914929
Isoetes echinospora


Isoetes echinospora, also known as spiny quillwort, spiny-spored quillwort or spring quillwort is a species of quillwort in the Isoetaceae family, and is the most abundant species in Canada. It can be found in shallow aquatic environments from Labrador and Newfoundland to Alaska, and south to Pennsylvania, Wisconsin, Colorado, and California. In Germany it is found in only 2 locations: the Feldsee and Lake Titisee, both in the High Black Forest. It bears 10-30 green to yellow leaves and a two-lobed corm
22109696
Isoetes acadiensis


Acadian quillwort (Isoetes acadiensis) is a species of quillwort in the Isoetaceae family described by Kott in 1981. It can be found along the shores of lakes, ponds, and rivers in Newfoundland, Nova Scotia, and New Brunswick, as well as in the American states Maine, Massachusetts, and New Hampshire. It has a similar distribution to that of "I. tuckermanii". It bears 9 to 35 mostly recurved leaves, each 5–21 cm long. The leaves are usually dark green, though can occasionally be tinged with
22150696
Isoetes macrospora


Isoetes macrospora (big-spore quillwort) is a species of quillwort in the Isoetaceae family. It can be found in the deep water of low nutrient lakes in the Precambrian Shield as well as in Newfoundland, Nova Scotia, Quebec, and Ontario. In the United States, it has been found in Minnesota and south, through the Appalachian Mountains to Virginia. It bears 3 to 17 long, stiff dark green leaves, sometimes with recurving tips. The sporangium can be 5 millimeters long and 4 millimeters wide, covered from
22150708
Isoetes tegetiformans


Isoetes tegetiformans, commonly known as mat-forming quillwort or mat-forming Merlin's grass, is an aquatic pteridophyte endemic to the U.S. state of Georgia. It grows exclusively in shallow, temporary pools on granite outcrops, often with only 2 cm of soil. Only 7 populations are known to exist, and three of these have been destroyed since the plant's discovery in 1976. The remaining populations are threatened with habitat destruction due to quarrying, though the species is protected under the U.S. Endangered Species Act. New leaves quickly
14331323
Isoetes melanospora


by quarrying, trash dumping and trampling. New leaves quickly sprout after fall and winter rains, but during the dry summer months these typically shrivel. "Isoetes melanospora" is a small plant growing in mud or shallow water but becoming terrestrial as the ground dries. Rootstock is nearly spherical. Leaves are up to 7 cm (2.8 inches) long, spirally arranged, tapering to the tip. Megaspores are gray or black, 350-480 μm in diameter. Microspores appear brown, each 26-31 μm across. The
15485926
Isoetes


by their hollow roots instead, which absorbs CO2 from the sediment. Isoetes andicola is unusual in being the only known terrestrial vascular plant that take up all its CO2 through the roots. Only 4% of total biomass, the tips of the leaves, is chlorophyllous. The roots broaden to a swollen base up to wide where they attach in clusters to a bulb-like, underground rhizome characteristic of most quillwort species, though a few (e.g. "I. tegetiformans") form spreading mats. This swollen base also contains male
18520973
Isoetes bolanderi


Bolander's quillwort (Isoetes bolanderi) is a species of quillwort, a type of lycopod. This aquatic plant is native to high altitude regions of the western United States and southern Alberta. It grows almost entirely underwater in lakes and other water bodies from a corm-like stem, which remains buried in the mud, producing up to twenty pointed, cylindrical leaves approaching 15 centimeters in maximum length. It reproduces via spherical sporangia, covered about one third by the velum. The ligule is small and heart-shaped. The
19914757
Isoetes riparia


Isoetes riparia (shore quillwort) is a species of quillwort in the Isoetaceae family. It can be found in rivers, creeks, and tidal mud flats in southern Quebec and southeastern Ontario, south to eastern New York. It has 5 to 35 long, erect bright green to yellow-green leaves, which are 6 to 35 centimeters long. The velum covers one fourth of the sporangium, which can be 7 millimeters long and 4 millimeters wide. The elongated ligule can grow to be 3 millimeters long. The spherical megaspores
22150643
Isoetes hieroglyphica


Isoetes hieroglyphica is a species of quillwort in the Isoetaceae family. It can be found in lakes of Quebec, New Brunswick, Maine, and Wisconsin, though relatively few of these species have been found and the distribution is poorly understood. It bears 7 to 15 leaves, each 5 to 11 centimeters long. Sporangium can be 5 millimeters long and 3 millimeters wide, covered about one third by the velum. White, spherical megaspores are 580 to 700 micrometers in diameter, their rounded ridges forming a network. The relatively smooth
22150698
Isoetes tuckermanii


Isoetes tuckermanii (Tuckerman's quillwort) is a tetraploid species of quillwort in the Isoetaceae family. It can be found in shallow water in Newfoundland, Nova Scotia, New Brunswick, and south through the New England states to Maryland. It bears 10 to 45 long bright green to yellow green leaves that are 4 to 25 centimeters long, usually erect, but sometimes recurved. The velum covers one fourth or less of the sporangium, which is usually unspotted, 5 millimeters long, and 3 millimeters wide. The white spherical megaspores
22190294
Isoetes occidentalis


Isoetes occidentalis (western quillwort) is a species of quillwort in the Isoetaceae family. It can be found in aquatic habitats of coastal Alaska and British Columbia south to California and Colorado. It is frequently found on Vancouver Island and around the Fraser Valley region. It bears 10 to 30 or more rigid, dark green leaves, each 5 to 20 centimeters long. The velum covers one fourth to one third of the orbicular sporangium, which is 5 to 6 millimeters in diameter. The ligule is shaped like a shortened triangle.
22190335
Isoetes toximontana


a Latin translation of the Afrikaans name of the mountain. "Isoetes toximontana" is an herb which grows in shallow water, very often emerging above the surface. Leaves are 3-10 per plant, up to 42 mm long, elliptical in cross-section. Mega- and microsporophylls may be found on the same plant. Megaspores number up to 36 per sporangium, gray-green, drying olive green, each up to 320 μm in diameter, covered with tubercules (bumps) over most of the surface. Microspores are
8584779
Isoetes melanospora


Isoetes melanospora, commonly known as black-spored quillwort or black-spored Merlin's grass, is a rare and endangered aquatic pteridophyte endemic to the U.S. states of Georgia and South Carolina. It grows exclusively in shallow, temporary pools on granite outcrops, often with only 2 cm of soil. 11 populations are known to exist in Georgia, while only one has been recorded in South Carolina, though this population is believed to be extirpated. The number of sites has dropped from 18 following its discovery due to habitat destruction caused
15485925
Taxon


any biological domain, but traditionally it was always used for animals, whereas "Division" was traditionally often used for plants, fungi, etc. A prefix is used to indicate a ranking of lesser importance. The prefix "super-" indicates a rank above, the prefix "sub-" indicates a rank below. In zoology the prefix "infra-" indicates a rank below "sub-". For instance, among the additional ranks of class are superclass, subclass and infraclass. Rank is relative, and restricted to a particular
20416053
Validly published name


a particular taxon and rank. Nevertheless, invalid names ("nomen invalidum", "nom. inval.") are sometimes in use. This may occur when a taxonomist finds and recognises a taxon and thinks of a name, but delays publishing it in an adequate manner. A common reason for this is that a taxonomist intends to write a "magnum opus" that provides an overview of the group, rather than a series of small papers. Another reason is that the code of nomenclature changes with time, and
14663024
Aromobatidae


The Aromobatidae are a family of frogs native to Central and South America. They are sometimes referred to as cryptic forest frogs. They are the sister taxon of the Dendrobatidae, the poison dart frogs, but are not as toxic as most dendrobatids are. The Aromobatidae were separated from the Dendrobatidae only in 2006, and some sources continue to treat these frogs as part of the Dendrobatidae. However, their position as the sister taxon is well supported, and the question is primarily about whether they should be ranked as a family or
17636105
Ozimops


30. The variation to this is the loss of a tooth in mature individuals, the upper anterior premolar, at one or both sides of the jaw. The taxon was first published as subgenus of "Mormopterus" in 2014, separating Australian groups whose diversity was reviewed and described as new species. The content of the new taxon was established or formerly cryptic taxa of Indo-Papuan species and a centre of diversity at the Australian mainland. This was elevated to the rank of genus in 2015. The arrangement of the genus
2029365
Taxon


coined a century before from the Greek components "τάξις" (taxis, meaning arrangement) and "-νομία" (-nomia meaning method). For plants, it was proposed by Herman Johannes Lam in 1948, and it was adopted at the VII International Botanical Congress, held in 1950. The Glossary of the "International Code of Zoological Nomenclature" (1999) defines a A taxon can be assigned a taxonomic rank, usually (but not necessarily) when it is given a formal name. "Phylum" applies formally to
20416052
Autonym (botany)


belonged to the species (and are not included in the newly described taxon) now become a new infraspecific taxon. But as neither the type nor the final epithet has changed, there is no need for a change in author citation. The same goes for a subdivision of a genus. If a botanist creates a new subdivision of a genus, for example by dividing a large genus into two or more subgenera, sections, or series, then a new subdivision of the genus at each of the new ranks will share the
20983137
Monera


Monera () (Greek - μονήρης (monḗrēs), "single", "solitary") is a kingdom that contains unicellular organisms with a prokaryotic cell organization (having no nuclear membrane), such as bacteria. They are single-celled organisms with no true nuclear membrane (prokaryotic organisms). The taxon Monera was first proposed as a phylum by Ernst Haeckel in 1866. Subsequently, the phylum was elevated to the rank of kingdom in 1925 by Édouard Chatton. The last commonly accepted mega-classification with the taxon
5726713
September 1941 lunar eclipse


A partial lunar eclipse took place on Friday, September 5, 1941. It was a shallow partial lunar eclipse, with less than 10% of the Moon covered in Earth's shadow. Aug 31, 1941 = Sunday Sep 1, 1941 = Monday Sep 2, 1941 = Tuesday Sep 3, 1941 = Wednesday Sep 4, 1941 = Thursday Sep 5, 1941 = Friday Sep 6, 1941 = Saturday Sep 7, 1941 = Sunday Sep 8, 1941 = Monday Sep 9, 1941 = Tuesday Sep 10, 1941
5363349
Tatuidris


of the tribe has been the focus of debate. Bolton (2003) was the first to suggest the taxonomic instability of "Tatuidris" within Myrmicinae and raised the genus to the level of a new subfamily, the Agroecomyrmecinae, suggesting that Agroecomyrmecinae might be the sister taxon to Myrmicinae. The subfamily rank was re-assessed by Baroni Urbani & de Andrade in 2007, this was the first attempt to include "Tatuidris" as a terminal taxon in a morphological cladistic analysis. In their study, Baroni Urbani & de Andrade identified
21404594
Correct name


In botany, the correct name according to the International Code of Nomenclature for algae, fungi, and plants (ICN) is the one and only botanical name that is to be used for a particular taxon, when that taxon has a particular circumscription, position and rank. Determining whether a name is correct is a complex procedure. The name must be validly published, a process which is defined in no less than 16 Articles of the ICN. It must also be "legitimate", which imposes some further requirements. If
19338399
Abelisauridae


. Abelisauridae is a family in rank-based Linnaean taxonomy, within the infraorder Ceratosauria and the superfamily Abelisauroidea, which also contains the family Noasauridae. It has had several definitions in phylogenetic taxonomy. It was originally defined as a node-based taxon including "Abelisaurus", "Carnotaurus", their common ancestor, and all of its descendants. Later, it was redefined as a stem-based taxon, including all animals more closely related to "Abelisaurus" (or the more complete "Carnotaurus") than to "
19559613
Gleicheniaceae


-shaped hairs. There is some dispute about ranking these ferns. They are typically placed in the order Gleicheniales. They may alternatively be considered a subclass Gleicheniatae or class Gleichenopsida, so that a distinct taxon can be established for the leptosporangiate ferns. In this case, the Gleicheniaceae are upranked to an order and receive the name Gleicheniales. Irrespective of their modern taxonomic treatment, the Gleicheniaceae were formerly included in the order Polypodiales. But the ferns in the loose sense are much too diverse a group to be shoehorned into one taxon
4344486
Taxonomic rank


by the nomenclature codes. There are seven main taxonomic ranks: kingdom, phylum or division, class, order, family, genus, species. In addition, "domain" (proposed by Carl Woese) is now widely used as a fundamental rank, although it is not mentioned in any of the nomenclature codes, and is a synonym for dominion (lat. dominium), introduced by Moore in 1974. A taxon is usually assigned a rank when it is given its formal name. The basic ranks are species and
17667700
Taxonomic rank


In biological classification, taxonomic rank is the relative level of a group of organisms (a taxon) in a taxonomic hierarchy. Examples of taxonomic ranks are species, genus, family, order, class, phylum, kingdom, domain, etc. A given rank subsumes under it less general categories, that is, more specific descriptions of life forms. Above it, each rank is classified within more general categories of organisms and groups of organisms related to each other through inheritance of traits or features from common ancestors. The rank
17667696
Taxonomic rank


nuclei in the domain Eukarya. The "International Code of Zoological Nomenclature" defines "rank" as: "The level, for nomenclatural purposes, of a taxon in a taxonomic hierarchy (e.g. all families are for nomenclatural purposes at the same rank, which lies between superfamily and subfamily)." In his landmark publications, such as the "Systema Naturae", Carl Linnaeus used a ranking scale limited to: kingdom, class, order, genus, species, and one rank below species. Today, nomenclature is regulated
17667699
Sorbeoconcha


Sorbeoconcha is a taxonomic clade of snails, i.e. gastropods, mainly marine species with gills and opercula, within the clade Caenogastropoda. The taxon Sorbeoconcha was named by Winston Ponder and David R. Lindberg in 1997. According to the older taxonomy by Ponder and Lindberg the suborders within the order Sorbeoconcha are: In the taxonomy by Bouchet & Rocroi (2005), the clade Sorbeoconcha was declared a taxon of unspecified rank, within the clade Caenogastropoda. It comprises the superfamily Cerithioidea, the superfamily Campaniloidea, the informal group Ptenoglossa and the clade
13363551
Stomatellinae


Stomatellinae is a subfamily of small sea snails with a brilliantly nacreous interior of the shell, marine gastropod mollusks in the family Trochidae, the top snails. In the earlier classification used in the Treatise on Invertebrate Paleontology, the Stomatellidae was included in the Archaeogastropoda, however, this taxon is now largely abandoned in favor of the more recently defined Vetigastropoda. According to Bouchet & Rocroi (2005), Williams et al. (2008) and Williams et al. (2010) this taxon underwent a rank change from family Stomatellidae to
2477997
Rhinonycteridae


in 2014. The affinities within the families Hipposideridae and Rhinolophidae are sometimes found to be contrary in morphological and molecular analyses, yet resolving the phylogeny of these speciose and poorly defined groups has implication in several areas of research. The synonymy includes earlier combinations that elevated the rank through subtribe, tribe then subfamily. The taxon Triaenopini Benda & Vallo, 2009 was also reduced to a synonym for this family by the authors of the 2014 revision that elevated this taxon. The hipposiderid and rhinolophid bats are of especial interest to research into potential
1208236
La Gomera giant lizard


to be controlled. In his scientific description, the German zoologist R. Hutterer referred the subfossil remains from La Gomera to two subspecies of "Gallotia simonyi" with the differences being size related. He named these "Gallotia simonyi bravoana" and "Gallotia simonyi gomerana". Bischoff (1998) synonymized them to a single taxon. Barbadillo "et al." (1999) decided for "bravoana" when they elevated the taxon to species rank. Nogales "et al." (2001) concurred as regards species status,
14733429
Orange-spotted trevally


a /j/ sound; Forsskål used this technique to name a number of Red Sea fish species. Forsskål at first gave the new taxon subspecies status as "Scomber ferdau bajad", relating it to the mackerels, and especially "Scomber ferdau", which would later also be transferred to "Carangoides". The taxon was later given a species rank, becoming "Scomber bajad", then "Caranx bajad", before being transferred to its current position as "Carangoides bajad". The species was also independently renamed three times
15301652
Drosera subg. Lasiocephala


monograph of the family and recognizing this taxon as a series under section "Rossolis". In 1996, taxonomist Jan Schlauer argued for the recognition of this taxon at the rank of subgenus, noting that these closely related species share many affinities with subgenus "Drosera" but are different enough to warrant subgeneric status. All species in this subgenus are native to northern Australia except for "D. petiolaris", which is more widely distributed to as far as New Guinea. The plants in this subgenus or "petiolaris"-complex mostly look like variations
19625002
Synonym (taxonomy)


Given that the correct name of a taxon depends on the taxonomic viewpoint used (resulting in a particular circumscription, position and rank) a name that is one taxonomist's synonym may be another taxonomist's correct name (and "vice versa"). Synonyms may arise whenever the same taxon is described and named more than once, independently. They may also arise when existing taxa are changed, as when two taxa are joined to become one, a species is moved to a different genus, a variety is moved to a
3098366
Name-bearing type


for example, the Central American rodent tribe Nyctomyini has "Nyctomys" as its type genus and its name consists of the stem of the type genus, Nyctomy-, and the appropriate ending for a tribe, -ini. "Genus group" ranks consist of the genus and subgenus. The name-bearing type for a genus-group taxon is the type species, which must be one of the species included when that taxon ("genus" hereafter for brevity) was first formally named or, when no species were included when
5809723
Botanical name


names may also have an extra component, bringing a maximum of four parts: A botanical name in three parts, i.e., an infraspecific name (a name for a taxon below the rank of species) needs a "connecting term" to indicate rank. In the "Calystegia" example above, this is "subsp.", for subspecies. In botany there are many ranks below that of species (in zoology there is only one such rank, subspecies, so that this "connecting term" is not used in
6449289
Class (biology)


In biological classification, class () is a taxonomic rank, as well as a taxonomic unit, a taxon, in that rank. Other well-known ranks in descending order of size are life, domain, kingdom, phylum, order, family, genus, and species, with class fitting between phylum and order. The class as a distinct rank of biological classification having its own distinctive name (and not just called a "top-level genus" "(genus summum)") was first introduced by the
15757221
Flight officer


. Flight officer was a United States Army Air Forces rank used during World War II, from 1942 to 1945; the rank being created on Sep 10, 1942 On 5 November 1942 military glider pilots were commissioned flight officers after the completion of their training. The new rank insignia was nicknamed "the blue pickle". The rank is equivalent to Warrant Officer Junior Grade (WOJG) which is today's Warrant Officer (NATO grade: W-1). Enlisted and aviation cadet trainees who successfully passed air qualification training were appointed as
18437829
Taxon in disguise


In bacteriology, a taxon in disguise is a species, genus or higher unit of biological classification whose evolutionary history reveals has evolved from another unit of similar or lower rank, making the parent unit paraphyletic. This happens when rapid evolution makes a new species appear radically different from the ancestral group, so that it is not (initially) recognised as belonging to the parent phylogenetic group, leaving the latter an evolutionary grade. While the term is from bacteriology, parallel examples are found throughout the tree of life. E.g. four-
13686091
Taxonomy (biology)


In biology, taxonomy () is the science of naming, defining (circumscribing) and classifying groups of biological organisms on the basis of shared characteristics. Organisms are grouped together into taxa (singular: taxon) and these groups are given a taxonomic rank; groups of a given rank can be aggregated to form a super-group of higher rank, thus creating a taxonomic hierarchy. The principal ranks in modern use are domain, kingdom, phylum (division is sometimes used in botany in place of phylum), class,
11753004
The Beeps


Sapphire Stream S2/Ep45 Apr. 29 Wash Those Socks! S2/Ep46 Dec. 12 The Bumps SEASON 3: S3/Ep1 Aug. 30 Up Down Hill S3/Ep2 Aug. 31 Caravan S3/Ep3 Sep. 6 Secret Garden S3/Ep4 Sep. 7 Bounceflower Tea S3/Ep5 Sep. 13 The Whale S3/Ep6 Sep. 14 Soggy Sockroaches S3/Ep7 Sep. 20 Stinkroots S3/Ep8 Sep. 21 Sing-a-long-a-beeps S3/Ep9 Sep. 27 History Book S3/Ep10 Sep. 28 What Goes Splat? S3
14688027
Signal Transfer Point


. SEPs send signaling messages to other SEPs, but the messages are normally routed via the SEP's adjacent STPs. An STP's main function is to identify the best path for two SEPs to communicate. A typical application would be for two SEPs to agree on the use of a shared data path (e.g., using ISUP to initiate a voice call between a user on one SEP and a user on the second SEP). In this way, STPs route signaling messages (for starting, maintaining or finishing any kind of
21819468
Signal Transfer Point


calls originated by the SEPs' attached users) while avoiding disabled intermediary STPs. A signaling message typically never goes directly from a given SEP to the destination SEP: the message would normally have to pass through the initiating SEP's adjacent STP so that it can be routed to the destination SEP. In some applications, however, SEPs might be directly connected with signaling links; this would typically be done to enhance robustness or performance between two critical SEPs. Such mesh network configurations are also common in Europe, where STPs have not
21819469
Variety (botany)


In botanical nomenclature, variety (abbreviated var.; in ) is a taxonomic rank below that of species and subspecies, but above that of form. As such, it gets a three-part infraspecific name. It is sometimes recommended that the subspecies rank should be used to recognize geographic distinctiveness, whereas the variety rank is appropriate if the taxon is seen throughout the geographic range of the species. The pincushion cactus, "Escobaria vivipara" , is a wide-ranging variable species occurring from Canada to Mexico, and found
20421108
The Beeps


/Ep20 Sep. 19 Bouncy Bouncy Beep Beep S2/Ep21 Sep. 19 Big Beepday Bash S2/Ep22 Sep. 20 Yuk Says No S2/Ep23 Sep. 24 Wheely Helpful S2/Ep24 Sep. 25 Teeny Beep Takes Off S2/Ep25 Sep. 26 Carnival S2/Ep26 Sep. 27 Peas and Beeps S2/Ep27 Apr. 25 Stuck on You! S2/Ep28 Dec. 9 Hole Lot of Trouble S2/Ep29 Dec. 15 A Little Adventure S2/Ep30 Dec. 16 The Lost Houses S2/Ep31 May 1 Bounceberry Pie S2/Ep32 Dec. 23
14688025
Harsh Mankad


ranked players, including Andy Roddick, Andy Murray, Lleyton Hewwitt, and other top ranked players such as James Blake, Marcos Baghdatis, and Scheng Schalken. Mankad has been a member of India Davis Cup team for over a dozen Davis Cup ties between Sep 2001 and Oct 2010. He was the highest ranked singles player from India on the ATP Tour in June 2005 (No. 220). He won the Manchester Challenger title in July 2006, becoming the first Indian since Leander Paes to win an ATP Challenger Series title
10094500
Tadatoshi Fujimaki


Fujimaki attended Toyama High School and enrolled to Sophia University. He chose for a Manga career after finishing his studies. Shonen Jump's Series of Manga Shorts About Creators as Rookies Continues with Yusei Matsui, Tadatoshi Fujimaki (Oct 28, 2018) Japanese Comic Ranking, September 3-9 (Sep 12, 2018) Japanese Comic Ranking, July 9-15 (Jul 18, 2018) Robot × Laserbeam, ZIGA Manga Both End in Shōnen Jump (Jun 24, 2018) Japanese Comic Ranking, May 7-13 (
7211551
Dryandra subg. Hemiclidia


Dryandra" subg. "Hemiclidia is an obsolete plant taxon that encompassed material that is now included in "Banksia". Published at genus rank as Hemiclidia by Robert Brown in 1830, it was set aside by George Bentham in 1870, but reinstated at subgenus rank by Alex George in 1996. In 2007, all "Dryandra" species were transferred into "Banksia" at series rank, and the infrageneric "Dryandra" taxa, including "D." subg. "Hemiclidia", were set aside. In 1810, Robert
19024017
Phylogenetic nomenclature


International Code of Zoological Nomenclature and the International Code of Nomenclature for algae, fungi, and plants, taxa that are not explicitly associated with a rank cannot be formally named, because the application of a name to a taxon is based on both a type and a rank. The requirement for a rank is a major difference between traditional and phylogenetic nomenclature. It has several consequences: it limits the number of nested levels at which names can be applied; it causes the endings of names to change if a group has its
4744915