The fauna of barklice (psocoptera) of the Southern Urals
Based on the material collected in 2014 in the Southern Ural State Nature Reserve and adjoining territory, 25 psocopteran species belonging to 17 genera of 8 families are recorded for the first time for the Republic of Bashkortostan. Among these, 20 species, 12 genera, and 4 families are new to the fauna of the Southern Urals, and two species are new to the Russian fauna.
Chromosome numbers in eight species of Palaearctic Psocoptera (Insecta)
Karyotypes of eight Psocoptera species are reported for the fi rst time. In Va- lenzuela oyamai (Enderlein, 1906) (Caeciliusidae), Peripsocus golubae Lienhard, 2006 (Peripsocidae), Trichopsocus dalii (McLachlan, 1867) (Trichopsocidae), Hemineura dispar Tetens, 1891 (Elipsocidae), and Amphigerontia contaminata (Stephens, 1836) (Psocidae) 2n = 16 + XX/X0. In Elipsocus moebiusi Tetens, 1891 (Elipsocidae) 2n = 12 + XX/X0. Neopsocopsis hitricornis (Reuter, 1893) (Psocidae) has 2n = 14 + XX/ X0, and Kolbia quisquiliarum Bertkau, 1883 (Amphipsocidae) has 2n = 14 + neo-XY/ XX. In addition, three seminal follicles per testis have been established in V. oyamai, H. dispar, A. contaminata, and N. hitricornis and one follicle in P. golubae and T. dalii. All the data available on psocopteran karyotypes are tabulated and shortly reviewed.
THE ODD CHROMOSOME IN CERASTIPSOCUS VENOSUS
1. The spermatogonial number of chromosomes is 17.2. The odd chromosome is condensed in The growth stage, first as a long beadlike structure, later as one round body.3. There are 9 chromosomes in the primary spermatocytes, 8 bivalent and one undivided odd chromosome.4. The odd chromosome does not divide in the first spermatocyte division.5. There are 9 chromosomes in half of the secondary spermatocytes and 8 in the other half.6. All the chromosomes, including the odd chromosome, divide in the second spermatocyte division.7. Therefore, this species of Corrodentia has dimorphic spermatozoa.