Rhabdoblatta chaulformis, 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: 37-39

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Rhabdoblatta chaulformis

sp. n.

Rhabdoblatta chaulformis   sp. n. Figure 5 A–K


Sclerite L2D is strongly sclerotized with a exclamation-shaped process, it is the unique diagnosis of this species.

Measurements (mm).

Male, head: length × width 3.5 × 3.0, pronotum: length × width 5.5 × 7.0, tegmen length: 28, overall length: 30.0-31.0.


Male. Body yellowish brown (Figure 5A). Vertex dark brown. Eyes dark brown, border yellow. Ocelli yellow. Scape of antennae yellowish brown, the other dark brown. Frons dark brown. The base of clypeus dark brown, remaining part yellow. Mandible and labrum yellow. Maxillary palpi with the fifth brown, the others yellow (Figure 5B). Pronotum yellow, disc brown, with dark brown spots on the surface, with longitudinal short stripes along hind margin (Figure 5C). Tegmina brown, veins yellow. Wings with costal field, radial field, and mediocubital field yellowish brown and anal field pale brown, veins obvious and brown (Figure 5E, F). Legs brown. Abdominal terga dark brown, sterna yellow and with scattered blackish brown spots. Cerci dark brown (Figure 5B).

Vertex slightly exposed (Figure 5B). Distance between eyes slightly wider than interocular width, the length ca. 2/3 of the space between antennal sockets (Figure 5B). Pronotum subelliptical, the anterior and lateral margins rounded, middle of hind margin distinctly convex (Figure 5C). Tegmina and wings fully developed extending well beyond the end of the abdomen, the apex of the tegmina and wings slightly protruding and veins distinct (Figure 5A, B, E, F). Anteroventral margin of front femur type B1 (Figure 5D). The metatarsus of hind leg longer than the sum of left tarsi, the inner mar gin with two rows of small spines. Tarsal pulvilli present on the apex of 1 st– 4th tarsomeres, small and spiked. Arolium present, claws symmetrical and unspecialized (Figure 5B).

Male genitalia. Supra-anal plate nearly semicircle, symmetrical, the middle of the hind margin slightly concave. Right and left paraprocts unsymmetrical, shape similar to other members in the genus (Figure 5G). Subgenital plate with hind margin unsymmetrical, slightly M-shaped margin. The base of the inner plate bifurcated. Styli long, whose length ca. 1/2 of interstyli space (Figure 5H). Left phallomere with sclerite R1T with bristles, end of R2 rounded, R3 and R5 interlinked, R4 weakly sclerotized (Figure 5I). The basal sclerite of L2D slender and rod-shaped, almost straight, apical sclerite irregular and with an exclamation-shaped process; the surface on the apical membrane with fine bristles, cap-shaped (Figure 5J). Sclerite L3 slender and hook deeply bent, and with semicircular carina; inner margin with groove and a tooth-shaped convexity at apex (Figure 5K).

Female. Female unknown.


This species epithet is derived from the Latin words chaul and formis, referring to L2D with a exclamation-shaped process.

Type material.

Holotype: male, Chongqing City, Wanzhou Dist, Wangerbao Nature Reserve, 1700 m, 2-V-2007, Wei-wei Zhang leg. Paratype: 1 male, same data as holotype (all in SWU).


China (Chongqing).