Hemithyrsocera Saussure 1893
- Dataset
- Three new species of cockroach genus Hemithyrsocera Saussure, 1893 (Blattodea: Ectobiidae: Blattellinae) with redescriptions of two known species from China
- Rank
- GENUS
Classification
- kingdom
- Animalia
- phylum
- Arthropoda
- class
- Insecta
- order
- Blattodea
- family
- Ectobiidae
- genus
- Hemithyrsocera
diagnosis
Generic diagnosis (modified from Che et al. 2009). Tegmina and hind wings fully developed extending well beyond end of abdomen. Tegmen with a posterior branch of radial vein, which is usually forked; M and Cu veins longitudinal. Hind wing with radial vein forked before the mid, M and Cu veins slightly or obviously curved, Cu with 0, 1, 2, rarely 3 complete, and without incomplete branches; apical triangle developed or small. Pronotum nearly elliptical and flattened, concealing head and mesonotum. Fore femur Type A 2 or A 3; pulvilli on 4 proximal tarsomeres, tarsal claws symmetrical and simple, arolia present. First abdominal tergum unspecialized; seventh abdominal tergum specialized, with medial depressed region, some species also with one lateral lobe on each side. Supra-anal plate symmetrical, with a subcercal (intercercal) process ventrally near the base of each cercus or not. Subgenital plate strongly asymmetrical, hind margin with various shaped processes bearing long spines; styli represented by 1 or 2 large processes, right stylus sometimes presents as a small cylindrical process. Male genitalia: male genitalia with L 3 on left side and L 2 vm often with a slender rod or filament arising near or beyond the middle.
discussion
Remarks. Hemithyrsocera bears close resemblance to Symplocodes in morphology. Both Hemithyrsocera and its close genus Symplocodes have highly complex structure on the hind margin of the subgenital plate, and even the median phallomere (L 2 vm) of some Hemithyrsocera and Symplocodes species is very similar (Roth, 1995). And the only character that clearly distinguishes Hemithyrsocera and its close genus Symplocodes is the distinctly toothed tarsal claw or not. Tarsal claws of Symplocodes are heavily and conspicuously dentate on inner margins (Figs 7 – 9; Zheng et al., 2016); but tarsal claws of Hemithyrsocera are smooth, without any teeth (Figs 1 – 6).
distribution
Distribution. Oriental Region.
materials_examined
Type species: Blatta palliata Fabricius, 1798