Jacobsonina uncata Cai, Yao & Che, 2025

Cai, Jin-Zhuo, Yao, Wen-Wen, Wang, Zong-Qing & Che, Yan-Li, 2025, On the species status of Blattella germanica and Blattella asahinai (Blattodea, Blattellidae), and other morphologically similar species, ZooKeys 1250, pp. 155-188 : 155-188

Jacobsonina uncata Cai, Yao & Che sp. nov.

Fig. 19 A – J

Type material.

Holotype: China • male; Yunnan Province, Xishuangbanna City, Jinuo Township, Situ Xinzhai ; 13 July 2020; Li-Kang Niu, Yi-Shu Wang leg. Paratypes: China • 1 male & 1 female, same collection data as holotype .

Measurements

(mm). Male, overall length (including tegmen): 11.2, tegmina length: 8.8, pronotum length × width: 2.3 × 2.5.

Diagnosis.

The principal morphological distinction between J. uncata sp. nov. and congeneric species resides in the medial region of posterior margin of the supra-anal plate: Jacobsonina species generally exhibit either a slight concavity or rounded convexity, whereas J. uncata sp. nov. displays a pronounced concave configuration. This species resembles Jacobsonina tortuosa Wang, Jiang & Che, 2009 in body size and coloration, but can be distinguished by the following characteristics: 1) J. uncata sp. nov. with spines on the posterior lateral corner of the supra-anal plate (absent in J. tortuosa ); 2) the hook phallomere of J. uncata sp. nov. with two hairy accessory sclerites, whereas only one accessory sclerite in J. tortuosa ; 3) the conspicuous curved hook structure on the posterior margin of right paraproct in J. uncata sp. nov. (absent in J. tortuosa ).

Description.

Male. Coloration. Body yellowish. (Fig. 19 A, B ). Head and face yellowish brown. Pronotum yellowish brown, without distinct markings. Ocelli pink. Basal part of antennae yellowish brown. Maxillary palpi dark brown (Fig. 19 C, D ). Abdomen pale brown. Legs yellowish brown (Fig. 19 F ).

Head. Interocular space about same as the distance between antennal sockets, slightly narrower than the distance between ocelli. Pronotum. Anterior margin slightly convex, lateral margins rounded, posterior margin slightly protruded medially (Fig. 19 C ). Tegmina and wings. Both fully developed, extending beyond the end of abdomen. Legs. Anteroventral margin of front femur Type B 3 (Fig. 19 F ). Pulvilli present. Tarsal claws symmetrical and unspecialized, with arolia present. Abdomen and genitalia. Abdominal tergum unspecialized. Supra-anal plate unsymmetrical, left posterior lateral corner with two spines, the right with three spines. Paraprocts dissimilar. Left paraproct specialized, with apical part and distal part both hooked; the former comparatively short, strongly bent with the apex smooth and directed to the right; the latter strongly elongated and curved to the left, four spines present near the apex. Right paraproct simple, apical part with four stout spines; basal part with the hooked projection slightly curved, inner margin with four spines present (Fig. 19 E ). Subgenital plate unsymmetrical with left side thickened, left posterior lateral corner with several spines; styli absent (Fig. 19 G ). The terminal incision of the hook phallomere distinct, two accessory sclerites with long hairs (Fig. 19 H ). Median phallomere slender, the basal part widened at base and sharply narrowed at apex (Fig. 19 I ). Right phallomere complex: anterior sclerite weakly sclerotized and expanded basally; middle sclerite well sclerotized, posterior sclerite with small projection (Fig. 19 J ).

Etymology.

The specific epithet originates from the Latin term uncatus, which refers to the conspicuous curved hook structure on the posterior margin of right paraproct.

Distribution.

China (Yunnan).

Figures

Figure 19. Holotype of Jacobsonina uncata Cai, Yao & Che, sp. nov. A. Habitus, dorsal view; B. Habitus, ventral view; C. Pronotum, dorsal view; D. Head, ventral view; E. Supra-anal plate, ventral view; F. Front femur, ventral view; G. Subgenital plate, ventral view; H. Left phallomere, ventral view; I. Median phallomere, ventral view; J. Right phallomere, ventral view. Scale bars: 5 mm (A, B); 1 mm (C – J).