Sinocyrtaspis megalobia, Wang & Xin & Shi, 2020

Wang, Tao, Xin, Yarui & Shi, Fuming, 2020, New interpretations of the genus Sinocyrtaspis Liu, 2000 (Orthoptera: Tettigoniidae: Meconematinae) from China, Zootaxa 4718 (4), pp. 584-590 : 585

1. Sinocyrtaspis megalobia sp. nov.

( Fig. 1 )

Description. Male. Body small, robust. Fastigium verticis conical, narrower than antennal scape, apex obtusely rounded, with a thin median sulcus. Eyes oval, obviously protruding forward. Apical segment of maxillary palpus slightly longer than subapical one, slightly swollen apically, truncate.

Pronotum somewhat long, reaching posterior margin of seventh abdominal tergite; anterior margin somewhat straight while posterior margin obtusely rounded; metazona gently extended outward and rather strikingly raised ( Fig. 1 A–B); lateral lobe longer than deep, posterior margin slightly expanded ventrally, without humeral sinus ( Fig. 1B ).

Tegmina short, completely covered by pronotum, invisible in lateral view; hind wings absent.

All femora unarmed ventrally, genicular lobes with apices obtuse. Fore coxae with 1 short spine; tibiae with 5 spines respectively on both sides of ventral surface, tibial tympana open on both sides, ovoid. Middle tibiae with 4 inner and 6 outer spines on ventral surface. Hind tibiae with 1 outer spine on ventral surface as well as 21–23 spines respectively on both sides of dorsal surface, bearing 2 pairs of ventral apical spurs and 1 pair of dorsal apical spurs.

Lateral margins of ninth abdominal tergite strongly prolonged posteriorly ( Fig. 1C ); posterior margin arc-shaped concave. Tenth abdominal tergite expanded posteriorly, 1/3 basal area wide, 2/3 apical area narrow ( Fig. 1G ), with a narrow longitudinal split in the midline, terminal of lateral lobe obtusely rounded ( Fig. 1K ). Cerci slightly elongate, faintly bent inward, dorsal margin of 2/3 basal area conspicuously expanded internally and dorsally, phylloid ( Fig. 1C, H ); 1/3 apical area of cerci spiniform, faintly compressed, terminal obtusely rounded ( Fig. 1H ). Genitalia sclerotized, exposed, longer than subgenital plate, terminal expanded, distal, edge rolled backward ( Fig. 1M ). Subgenital plate nearly rectangular, basal area with an angular notch, lateral margins of 2/3 apical area faintly extended dorsad ( Fig. 1K ), posterior margin with a triangular concavity; styli stout, inserted on apico-lateral margins of subgenital plate ( Fig. 1L ).

Female. Pronotum slightly short, slightly surpassing anterior margin of second abdominal tergite. Lateral margins of ninth abdominal tergite rather protruding unusually backward ( Fig. 1F ), reaching middle area of subgenital plate; posterior margin arc-shaped concave ( Fig. 1I ). Tenth abdominal tergite slightly elongated posteriorly, posterior margin sunken in the middle ( Fig. 1I ). Cerci conical, apices somewhat blunt. Ovipositor robust at base, apical half moderately bent dorsad, apex acute; dorsal and ventral margins smooth, ( Fig. 1F ). Subgenital plate peltate, posterior margin a bit concave ( Fig. 1J ).

Coloration. Body green when alive, while yellowish green when dried and pinned. Eyes brown. Fastigium verticis light brown. Disc of pronotum with 1 broad longitudinal light brown stripe, lateral margins black brown; outer edges of stripe with 1 longitudinal yellow stripe respectively, of which posterior areas inconspicuous ( Fig. 1A, D ). Dorsal surface of abdomen with 1 longitudinal light brown stripe. Apical of male genitalia black ( Fig. 1M ). Apices of all third tarsi and claws brown, apical area of dorsal spines on hind tibiae black brown.

Measurements (mm). Body: ♂ 10.0–10.6, ♀ 10.1–11.9; pronotum: ♂ 6.1–6.6, ♀ 4.0–4.5; hind femora: ♂ 8.5– 8.9, ♀ 8.4–8.9; ovipositor: 5.9–6.7.

Material examined. Holotype: ♂, Yangmingshan, Shuangpai , Hunan, 23 August, 2019, coll. Yarui Xin. Para- types: 1♂ 1♀, Yangmingshan, Shuangpai, Hunan, 23 August, 2019, coll. Yarui Xin. Other specimens: 1♂ 1♀, Yang- mingshan, Shuangpai, Hunan, 23 August, 2019, coll. Yarui Xin.

Distribution. China (Hunan).

Discussion. This new species resembles Sinocyrtaspis lushanensis Liu, 2000 , but differs in the following: male tenth abdominal tergite prolonged posterior, 1/3 basal area wide, 2/3 apical area narrow with a narrow longitudinal split in the midline, terminal of lateral lobe obtusely rounded; cerci slightly long, dorsal margin of 2/3 basal area conspicuously expanded innerly and dorsad, phylloid; 1/3 apical area of cerci spiniform, faintly compressed, terminal obtusely rounded. Subgenital plate of female peltate, posterior margin a bit concave.

Etymology. The name of new species is derived from male cerci with a huge phylloid expansion. Greek “ meg -” means huge, and Greek “ lob -” means lobe.

Figures

FIGURE 1. Sinocyrtaspis megalobia sp. nov.: A–B, D–E. pronotum: A, D. dorsal view; B, E. lateral view; C, F, G–I, K. apex of abdomen: C, F. lateral view; G, I. dorsal view; H. apical view; J, L. subgenital plate in ventral view; K. latero-ventral view; M. genitalia in apical view. A–C, G–H, K–M. male; D–F, I–J. female.