Hemithyrsocera longiseta, Wang, Zongqing & Che, Yanli, 2017

Wang, Zongqing & Che, Yanli, 2017, Three new species of cockroach genus Hemithyrsocera Saussure, 1893 (Blattodea: Ectobiidae: Blattellinae) with redescriptions of two known species from China, Zootaxa 4263 (3), pp. 543-556 : 552-555

5. Hemithyrsocera longiseta sp. nov.

Figs. 18–19 , 68–79

Measurementes (mm). Male, overall length including tegmina: 17.0–19.5; pronotum length × width: 3.5 × 4.0– 4.53; tegmina length: 14.0–15.5.

Body blackish brown. Head black ( Fig. 18 ). Occiput region pale yellow. Maxillary palpomeres blackish brown. Antennae black with base brown. Pronotum black with anterior and lateral margins yellow ( Fig. 18 ). Tegmina pale brown with subcostal zone brown or black. Legs black or blackish brown. Abdominal terga and sterna blackish brown.

Vertex with interocular space slightly less than distance between antennal sockets ( Fig. 68 ). The third and fifth maxillary palpomeres about same length, both slightly longer than the fourth ( Fig. 69 ). Pronotum nearly elliptical, slightly convex at mid of hind margin ( Fig. 70 ). Hind wing with narrow radius area, R1 with 4 branches, posterior branches of R extended behind the base of anterior rami of radius and bifurcated at apical; M simple, Cu with two branches; apical triangle distinct. Front femur Type A3 ( Fig. 71 ). Seventh abdominal tergum specialized with relatively huge, densely group of setae medially, laterally near each posterior corner with clubbed, minutely setose lobe ( Fig. 74 ). Supra-anal plate in ventral view with hind margin strongly convex, right and left intercercal processes absent; right and left paraprocts dissimilar, right one subtriangular with clubbed and short sclerotisation, left one longer with slender sclerotisation, and both with spines at base and apices membranous and setose ( Fig. 75 ). Subgenital plate in dorsal view strongly asymmetrical ( Fig. 76 ) and the posterolateral corners produced into process, the left one broad with apex bearing a group of long setae, the right one shorter and smaller; a small clubbed stylus situated near the right corner; one flat extension near the stylus, and hind margin scattered with setae ( Fig. 76 ).

Male genitalia. L3 ( Fig. 77 ) long and slender, hook portion small and without preapical incision; L2vm ( Fig. 78 ) elongated, distally enlarged, base broadly rounded, with densely brush-like setae; R2 ( Fig. 79 ) with 2 large and irregular sclerite, one nearly triangular, the other nearly C-shaped. R3 ( Fig. 79 ) with 2 obvious sclerites, one of which large and inversed Y-shaped, the other nearly L-shaped, whose base with 2 spines.

Material examined. Holotype: ♂, China, Guangdong, Fengkai County, Heishiding , 20–22 July 2007, leg. Jia Fenglong.

Paratypes: 1 ♂, Guangdong, Fengkai County, Heishiding , 11 July 2000, leg. Luo Qing.

Remarks. This species resembles H. marginalis (Hanitsch, 1933) , but differs in the following characteristics: 1) seventh abdominal tergum specialized with relatively huge, densely group of setae medially, laterally with setose lobe, while in H. marginalis , densely group of setae medially and setose lobe absent; 2) right and left intercercal processes absent, present in H. marginalis ; 3) the left side of subgenital plate with one process bearing a group of long setae, while in H. marginalis , two processes bearing spines present in the left side of subgenital plate.

Etymology. The Latin term “longisetus” refers to the robust process of subgenital plate bearing a group of long setae.

Distribution. China (Hainan Prov.).

Figures

FIGURES 10 – 19. 10 – 11 Hemithyrsocera simulans (Bey-Bienko, 1969), male: 10 dorsal view; 11 ventral view. 12 – 13 Hemithyrsocera banvaneuensis Roth, 1985, male: 12 dorsal view; 13 ventral view. 14 – 15 Hemithyrsocera forcipata sp. nov., holotype: 14 dorsal view; 15 ventral view. 16 – 17 Hemithyrsocera spinibarbis sp. nov., holotype: 16 dorsal view; 17 ventral view. 18 – 19 Hemithyrsocera longiseta sp. nov., holotype: 18 dorsal view; 19 ventral view. Scale bars = 1.0 cm.

FIGURES 68 – 79. Hemithyrsocera longiseta sp. nov. male: 68 head; 69 maxillary palp segments 3 – 5; 70 pronotum; 71 front femur; 72 tegmen; 73 hind wing; 74 seventh abdominal tergum; 75 supra-anal plate and paraprocts, ventral view; 76 subgenital plate, dorsal view; 77 hook-like phallomere (L 3); 78 median phallomere (L 2 vm); 79 right phallomere (R 2 and R 3). Scale bars = 0.5 mm.