Pseudepitettix hainanensis, Deng, 2020

Deng, Wei-An, 2020, Taxonomic revision of the subfamily Cladonotinae (Orthoptera: Tetrigidae) from China with description of three new species, Zootaxa 4789 (2), pp. 403-440 : 424-427

Pseudepitettix hainanensis sp. nov.

( Figures 8–9 )

Description. Female. Small size, short and smooth, body surface interspersed with granules.

Head. Head is not exserted above pronotal surface. Fastigium of vertex in dorsal view, width of vertex between eyes 1.3 times width of compound eye; anterior margin of fastigium nearly truncate, not surpassing anterior margin of eye; median carina visible anteriorly; lateral margins turned backward. In lateral view, frontal ridge and vertex forming right angle, frontal costa slightly concave above lateral ocelli, protruded anteriorly and broadly rounded between antennal grooves. In frontal view, frontal costa bifurcated above lateral carinae, scutellum (longitudinal furrow) widely forked between antennae, the rami strongly divergent, width of longitudinal furrow of frontal ridge 3.0 times antennal groove diameter. Antennae short, filiform, antennal grooves inserted below inferior margin of compound eyes, 13-segmented, the 6th and 7th segment are the longest, about 3-4 times longer than its width. Eyes globose, lateral (paired) ocelli located lowest third of compound eye height.

Thorax. Pronotum short, with a straight anterior margin; upper margin of pronotum slightly lamellate elevated and tectiform, in profile upper margin of pronotum arch-like before shoulders and straight behind shoulders; median carina entire; lateral carinae of prozona parallel; humeral angle arched, with interhumeral carinae; lateral carinae of pronotum straight after shoulders; hind pronotal process wide, not reaching knee of hind femur and its apex slightly rounded and with weak excision. Lower margin of hind process curved, lateral carinae of metazona curved too, width of the area between the two is 1.1 mm. Posterior angles of lateral lobes produced outwards, end of posterior angles slightly truncate, posterior margins of lateral lobes of pronotum only with ventral sinus. Tegmina and hind wings absent.

Legs. Fore and middle femora slightly compressed, margins finely serrated, with carinated and slightly undulated ventral margins. Hind femora robust and short, 2.3 times as long as wide; with carinated and margins finely serrated, antegenicular denticles and genicular denticles acute. Outer side of hind tibia with 6–7 spines, inner side with 4–5 spines. Length of first segment of posterior tarsi equal to third, three pulvilli of first segment of posterior tarsi are increased in turn, apex right angle.

Abdomen. Ovipositor narrow and long, length of upper valvulae 3 times its width, upper and lower valvulae with slender saw-like teeth. Length of subgenital plate nearly equal to its width, middle of posterior margin of subgenital plate triangular projecting.

Coloration. Body brown; antennae brown. Hind tibia dark brown, with a light ring in the base.

Male. Similar to female, but smaller and narrower. Subgenital plate short, cone-shaped, apex bifurcated.

Measurements (mm). Length of body: ♂ 6.5–7.0, ♀ 7.0–7.5; length of pronotum: ♂ 4.5–5.0, ♀ 5.0–5.5; length of hind femur: ♂ 3.8–4.2, ♀ 4.0–4.5.

Type material. Holotype: 1♀, China, Hainan prov., Baisha (Yinggeling), 19°02.3866ʹ N, 109°34.1783ʹ E, 350m alt., 25 July 2017, collected by Wei-An DENG, EMHU . Paratypes. 1♂, same data, type locality, EMHU ; 2♀, China, Hainan prov., Baisha (Yinggeling), 400m alt., 20 May 2008, collected by Yi-Bin BA, EMHU ; 1♂, China, Hainan prov., Baisha (Yinggeling), 400m alt., 05 January 2010, collected by Xiao-shuan BAI, EMHU .

Diagnosis. New species is similar to Pseudepitettix linaoshanensis Liang & Jiang, 2004 from which it differs in width of vertex between eyes 1.3 times width of compound eye (width of vertex between eyes 2 times width of compound eye in P. linaoshanensis ); width of longitudinal furrow of frontal ridge 3.0 times antennal groove diameter (width of longitudinal furrow of frontal ridge 2.0 times antennal groove diameter in P. linaoshanensis ); antennal grooves inserted below inferior margin of compound eyes (antennal grooves inserted between inferior margin of compound eyes in P. linaoshanensis ); lateral carinae of prozona parallel (lateral carinae of prozona constricted backward in P. linaoshanensis ); ventral margins of fore and middle femora undulated (ventral margins of fore and middle femora straight in P. linaoshanensis ).

Etymology. The new species was named after the type locality, Hainan, China; adjective.

Distribution. P. R. CHINA: Hainan.

Note. Pseudepitettix hainanensis Deng was proposed in DENG’s (2016) PhD Dissertation, which has not been published according to the criteria of availability (ICZN 1999: Art. 8.1). The name Pseudepitettix hainanensis Deng is made available in this paper.

Figures

FIGURE 8A–E. Pseudepitettix hainanensis sp. nov., female, holotype: A—body in dorsal view; B—body in lateral view; C—head in dorsal view; D—head in frontal view; E—head in lateral view. (scale bar = 1 mm).

FIGURE 9A–H. Pseudepitettix hainanensis sp. nov., female, holotype:A—left fore femur in lateral view; B—left mid femur in lateral view; C—left hind femur in lateral view; D—left hind tibia in dorsal view; E—left posterior tarsi in lateral view; F—subgenital plate of female in ventral view; male, paratype: G—body in dorsal view; H—body in lateral view; (scale bar = 1 mm).