We do know that âlorryâ first appeared in print in the early 19th century meaning âa long, low wagon,â and by 1911 had acquired its modern meaning of âa large motor vehicle used to carry cargo.â. Compared to the fog surrounding âlorry,â the roots of âtruckâ in the âlarge vehicleâ sense are satisfyingly clear.ou do not need to use your real name (although it would be nice to do so) or your real email address. All comments are, however, held for moderation, so it may take a day or two for yours to appear.
Polyplacophorans include about 600 extant species. Entirely marine, they inhabit hard bottoms and rocky coasts in all of the world's oceans. Although commonly intertidal, living chitons have been dredged from waters as deep as 7000 m. Of the two subclasses, Paleoloricata and Neoloricata, only the latter is represented by living examples. The shell plate of a neoloricatan extends beneath the adjacent plate. Lacking this feature, the paleoloricatates are considered less derived.
The tongue-twister Polyplacophora is Latin for many plates.. The animals in this class are commonly known as chitons (that's a lot easier to say than polyplacophorans!), and they have eight overlapping plates, or valves, on their flat, elongated shell. About 800 species of chitons have been described. Most of these animals live in the intertidal zone. Chitons may be from 0.3 to 12 inches long. Under their shell plates, chitons have a mantle, bordered by a girdle. They may also have spines or hairs.