Scalida hamata Qiao & Che, 2023

Qiao, Limin, Li, Qianqian, Yao, Wenwen, Wang, Zongqing & Che, Yanli, 2023, Three new species of Scalida (Blattodea: Blattellidae) from Yunnan, China, Zootaxa 5306 (1), pp. 144-150 : 146-147

1. Scalida hamata Qiao & Che sp. nov.

Description. Male: pronotum length×width 2.1× 3.1 mm, body length including tegmen 11.2 mm.

Body yellowish brown. Head reddish brown. Face with two brown stripes. Ocellar spots yellowish white. Antennae brown, lighter at base. Pronotum blackish brown and slightly lighter in the middle, anterior and two side borders yellowish white. Tegmina blackish brown with costal field and part of radial field yellowish white. Vertex with interocular space equal to the distance of antennal sockets. Third and fifth maxillary palpomeres about equal in length, each distinctly longer than the fourth. Pronotum nearly trapezoidal, hind margin slightly arched ( Fig. 1A–B ). Tegmina and hind wings fully-developed, extending beyond end of abdomen. M of hind wing unbranched and distinctly curved near middle. CuA with 2 complete branches and 1 incomplete branch ( Fig. 1E ). Front femur Type B3 ( Fig. 1C ). T7 specialized with a pair of symmetrical glands in the middle, hind margin with a broad and conspicuous concavity, and a knob on each posterolateral corner ( Fig. 1D ).

Supra-anal plate symmetrical, middle of hind margin slightly knobbed with many bristles and a spine-like process on each side ( Fig. 1G ). Paraprocts asymmetrical; spine-like branch of right paraproct longer, bending forward at right angle; spine-like branch of left paraproct small and slightly curved ( Fig. 1G ). Subgenital plate nearly symmetrical, posterior margin rounded. Right stylus curved to the right. Left stylus curved to the left. Hooked phallomere on the left of subgenital plate, median phallomere slender and rodlike, with an irregular sclerite, right phallomere with an S-shaped sclerite ( Fig. 1H ).

Diagnosis. This species is similar to S. pyrrhocephala in the shape of subgenital plate and styli. It differs from the species as follows: 1) pronotum with broad and indistinct U-shaped macula in the former, while pronotum with narrower and conspicuous U-shaped macula in the latter; and 2) left paraproct with a spine-like branch, slightly curved in the former, while left paraproct without a spine-like branch, only with three minute spines near apex in the latter (see Wang et Che 2010: 45 Figs. 32, 37).

Etymology. The species name is derived from the Latin word “hamatus”, referring to the spine-like branch of right paraproct being hooked shape.

Holotype. Male, Yunnan Province, Mongla County, Shangyong Township , Longmen Village , 8-V-2015, Jianyue Qiu leg. Paratype. 1 male, same collection data as holotype .

Figures

FIGURE 1. A–H. Scalida hamata Qiao & Che sp. nov., male. A. habitus, dorsal view, paratype; B. habitus, ventral view, paratype; C. front femur, ventral view, holotype; D. seventh abdominal tergite, dorsal view, holotype; E. left wing, dorsal view, paratype; F. right tegmen, dorsal view, paratype; G. supra-anal plate, ventral view, holotype; H. subgenital plate, dorsal view holotype. Scale bars = 5.0 mm (A, B), 2.0 mm (E, F), 0.5 mm (C, D, G, H).