Criotettix nigripennis, Wei, Shizhen, Zheng, Zhemin & Deng, Weian, 2007

Wei, Shizhen, Zheng, Zhemin & Deng, Weian, 2007, A review of the genus Criotettix Bolivar (Orthoptera: Scelimenidae) from China, Zootaxa 1423, pp. 39-49 : 45-47

13. Criotettix nigripennis sp.nov. ( Figs.2 )

Diagnosis

Criotettix nigripennis sp.nov. is easily distinguished from the other species of the genus Criotettix by width of vertex narrower than the width of an eye, disc of pronotum coarsely, with numerous small tubercles, midkeel of pronotum interrupted, wings only reaching 3/4 of hind femur, not reaching the top of caudal end of pronotum, hind pulvillus of first segment of hind tarsus longer than first and second.

Description

Ψ Figs. 2 a,2b: Size small, thickset. Head not exserted above the pronotal surface. Width of vertex equal to the width of an eye, anterior margin of vertex arced, not protruding beyond eyes ( Fig. 2 c), lateral ridge slightly raised, median carina distinctly, in profile, vertex and frontal ridge forming an obtuse round shape( Fig.2 d). Frontal ridge protruding archly between antennae, width of longitudinal furrow slightly narrower than width of first segment of antennae. Antenna filiform, 15-segmented, length of a segment in middle about 7 times longer than width, inserted one third of anterior margin of eyes ( Fig. 2 e). Eyes globose, lateral ocelli placed on middle of anterior margins of eyes. Disc of pronotum coarsely, with numerous small tubercles, anterior margin of pronotum straight, midkeel of pronotum interrupted ( Fig.2 a), upper margin of pronotum undulated in profile ( Fig. 2 b). Lateral keels of prozona constricted backward slightly ( Fig. 2 a), humeral angle widely rounded, with a pair short longitudinal keels between shoulder ( Fig. 2 a), caudal end of pronotum narrow, short cone-shaped, just surpassing the top of hind femora, length of hind process which surpassing behind top of hind femur about 0.7–1 mm ( Fig.2 a,2b). Lateral lobes of pronotum turning outwardly, posterior angles directed distinctly backwards, apex of posterior angles strident, posterior margin of each lateral lobe with two bisinuate. Tegmina long, ovate, apex narrowly rounded. Hind wings abbreviated, only reaching 3/4 of hind femur, not reaching the top of hind process ( Fig. 2 b). Upper and lower margins of fore and middle femora straight ( Fig. 2 f), width of midfemur 1.2 times wider than the width of tegmina. Hind femur 3 times longer than wide, antegenicular and genicular denticles right angle. Outer side of hind tibia with 8 spines, inner side with 7 spines. Length of first segment of hind tarsus longer than third, third pulvillus longer than first and second, apices of first and second sharp, apices of third obtuse ( Fig. 2 g). Ovipositor narrow and long, length of upper valvulae 3.5 times its width, upper and lower valvulae with slender saw-like teeth. Length of subgenital plate equal to its width, middle of posterior margin of subgenital plate with a triangular convex ( Fig. 2 h).

Body dark brown. Wings black ( Fig. 2 b). Hind femur brown. lower outer side black ( Fig. 2 b). Hind tibia dark brown.

ɗ: Body size smaller than Ψ, feature of structure similar to Ψ. Subgenital plate brief cone-shaped, apex sharp( Fig. 2 i).

Measurements: Length of body: ɗ 8–8.5 mm; Ψ 11–12.5 mm; length of pronotum: ɗ 7.5–8 mm; Ψ 11.5–12 mm; length of hind femur: ɗ 5.5–6 mm, Ψ 6.5–7 mm.

Holotype Ψ. P.R. CHINA, Guangxi prov., Tiandeng (shangyin), 23.1°N, 107.1°E, 350m alt, 13.viii.2005, collected by Shi-Zhen WEI. Paratypes. two ɗs and four Ψs, Same data as for holotype; one ɗ and two Ψs, Guangxi prov., Shangling (Damingshan), 23.5°N, 108.6°E, 200m alt, 26.viii.2005, collected by Wei-An DENG. Material is deposited in the Institute of Zoology, Shaanxi Normal University.

Etymology. This new species name is derived from the Latin nigri and pennis, meaning wings black.

Figures

FIGURE 2. Criotettix nigripennis sp. nov. a) body of Ψ, dorsal view; b) body of Ψ, lateral view; c) head of Ψ, dorsal view; d) head of Ψ, lateral view; e) head of Ψ, frontal view; f) middle femur of Ψ, lateral view; g) first and second posterior tarsal segments; h) subgential plate of Ψ, ventral view; i) subgential plate of %, lateral view (enlargement bar: a, b = 1 mm; c, d, e, f, g, h, i = 0.5 mm).