Rhabdoblatta gyroflexa, Yang, Rong, Wang, Zhenzhen, Zhou, Yanshuang, Wang, Zongqing & Che, Yanli, 2019

Yang, Rong, Wang, Zhenzhen, Zhou, Yanshuang, Wang, Zongqing & Che, Yanli, 2019, Establishment of six new Rhabdoblatta species (Blattodea, Blaberidae, Epilamprinae) from China, ZooKeys 851, pp. 27-69: 37

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Rhabdoblatta gyroflexa

sp. n.

Rhabdoblatta gyroflexa   sp. n. Figure 4 A–K


This species is similar to Rh. elegans   Anisyutkin, 2000 in body color, but can be differentiated by the following characters: 1) pronotum reddish yellow with a subtrapezoid dark brown marking at disc (pronotum reddish brown without any marking at disc in the latter); 2) body large (the latter with body medium); and 3) stripes absent in the abdomen (long and black stripes at the hind margin of each segment of the abdominal sterna in the latter); 4) apical part of sclerite R3 of left phallomere turned over (none in the latter).

Measurements (mm).

Male, pronotum: length × width 7.5-8.0 × 10.0-10.5, tegmen length: 39.5-42.0, overall length: 44.5-46.0.


Male. Body reddish brown (Figure 4A). Vertex, antennae and eyes dark brown. Ocelli yellowish brown. Frons reddish brown, but space between ocelli dark brown. Clypeus yellowish brown. Mandible and labrum yellowish brown. The first and second of maxillary palpi yellowish brown, the others dark brown (Figure 4B). Pronotum reddish yellow, with a subtrapezoid dark brown marking at disc (Figure 4C). Tegmina with mediocubital field brown, the other field reddish brown. Wings with costal field, radial field, and mediocubital field brown and anal field yellowish brown with veins brown (Figure 4E, F). Coxa, trochanter and femur yellowish brown; the distal part of femur, tibia, tarsomere dark brown. Abdomen brown, abdominal sterna with blackish brown spots along the lateral margins, and with yellow stripes at the lateral and hind margins of the segments. Cerci dark brown (Figure 4B).

Vertex slightly exposed (Figure 4B). Eyes wide, the hind margin extending to the base of the mandible (Figure 4B). Pronotum subelliptical, the widest part in the middle, anterior and lateral margins rounded, middle of hind margin distinctly convex (Figure 4C). Tegmina and wings fully developed extending well beyond the end of the abdomen, the apex of the tegmina and wings with a small convexity and veins clearly (Figure 4A, B, E, F). Anteroventral margin of front femur type B2 (Figure 4D). The metatarsus of hind leg equal length to sum of left tarsi, inner margin with two rows of small spines. Tarsal pulvilli present on the apex of 1 st– 4th tarsomeres. The pretarsus with arolium, claws symmetrical and unspecialized (Figure 4B).

Male genitalia. Supra-anal plate nearly semicircular, the middle of the hind margin slightly concave. Right and left paraprocts unsymmetrical, shape similar to other members in the genus (Figure 4G). Subgenital plate with hind margin nearly straight. The base of the inner plate bifurcated. Styli long and flat, whose length ca. 1/3 of interstyli space (Figure 4H). Left phallomere with sclerite R1T apex near square, end of R2 rounded, R3 and R5 interlinked, the base of R3 turnover and without bifurcation at apex, R4 nearly rectangle and existing independently (Figure 4I). The basal sclerite of L2D slender and rod-shaped, apical sclerite short and small; the surface of the apical membrane with fine bristles, cap-shaped (Figure 4J). Sclerite L3 hook deeply bent and with semicircular carina with margin smooth; inner margin with groove and a tooth-shaped convexity at apex (Figure 4K).


Female unknown.


This species epithet is derived from the Latin words gyroflexus, referring to the yellowish brown marking on the pronotum.

Type material.

Holotype: male, Guangxi Prov., Congzuo City, Pingxiang, 8-V-1963, Ji-kun Yang leg. Paratype: 1 male, same data as holotype; 1 male, Guangxi Prov., Congzuo City, Pingxiang, 8-V-1963, Si-kong Liu leg. (all in SWU).


China (Guangxi).