Nigrimacula inlobata Cui, Liu & Shi, 2021

Cui, Peng, Liu, Qing & Shi, Fu-Ming, 2021, Notes on the genus Nigrimacula Shi, Bian & Zhou, 2016 (Tettigoniidae: Meconematinae: Meconematini) from Yunnan, China with two new species, Journal of Natural History 55 (15 - 16), pp. 969-977 : 973-976

Nigrimacula inlobata Cui, Liu & Shi sp. nov. ( Figure 3 ; Map 1)

Types

Holotype. Male, Qiaohou, Eryuan , Yunnan, 26°5 ʹ 12”N, 99°43–44 ʹ E, 2152–2384 m, 5 September 2020, coll. Peng Cui.

Paratypes. 3 males and 4 females, same data as holotype .

Diagnosis

This new species differs from the other species of the genus by the male cercus that has the central area expanded, compressed and narrowing towards apex, the apical area bluntly rounded, and the inner lobe is roughly trapezoid and lamellar. The female subgenital plate has the basal area broad, narrowing, and the posterior margin concave.

Description

Male. Fastigium verticis conical with a longitudinal sulcus, apex obtusely rounded. Eyes oval and protruding forward. Apical segment of maxillary palpus slightly longer than subapical segment, apex faintly enlarged.

Anterior margin of pronotum nearly straight, posterior margin obtusely rounded ( Figure 3 (a)); lateral lobe longer than deep, ventral margin nearly arch-shaped, humeral sinus conspicuous ( Figure 3 (b)). Thoracic foramen exposed, oval and slightly constricted near middle ( Figure 3 (b)). All femora unarmed on ventral surfaces. Procoxa with a short spine; protibia with 5 pairs of long spines on ventral margin, of which the apical pair is shortest; tibial tympana open on both sides. Mesotibia with 5 pairs of long spines on ventral margins, of which the apical pair is shortest. Metatibia with 16–22 spines on inner and outer dorsal surface, as well as a pair of dorsal apical spurs and 2 pairs of ventral apical spurs.

Tegmen with basal half broader than apical one, narrowing, apex bluntly rounded and extending beyond apex of metafemur; hind wing slightly protruding beyond tegminal apex.

Posterior margin of tenth abdominal tergite feebly concave. Left and right cerci shorter than other species of the genus, stout and symmetrical, near middle area expanded, compressed and narrowing to apex, apical area bluntly rounded; cerci provided with an inner lobe of approximately trapezoid and lamellate outline and have the apical area archshaped ( Figure 3 (c–f)). Subgenital plate longer than broad, basal half nearly rectangular, apical half narrowing and with a reversed V-shaped ridge in middle of ventral surface; posterior margin straight. Stylus conical, long, apex acute, inserted near lateral margins of ventral surface near apical margin of subgenital plate ( Figure 3 (f)). Genitalia completely membranous.

Female. Appearance is similar to that of male. Cercus conical, middle area stout and apex acute. Ovipositor with basal area stout, apical half moderately curved dorsad; dorsal and ventral margins smooth; dorsal valvulae longer than ventral valvulae, apices of dorsal valvulae acute, of ventral valvulae hook-shaped. Subgenital plate with basal area broad, narrowing to apex, and posterior margin concave.

Colouration

Body yellowish green (green when alive). Fastigium verticis blackish brown, dorsum of head with a light brown stripe along midline; pronotum with a wide yellowish brown stripe along midline that is fading in metazona; pronotum with pairs of blackish brown spots on anterior area and on anterior area of metazona, centre of posterior margin black. Tegmen green, in apical half with numerous light brown spots.

Measurements (mm)

Body: ♂ 11.0–12.2; ♀ 10.0–12.2; pronotum: ♂ 4.0–4.2, ♀ 3.9–4.2; tegmen: ♂ 14.7–15.5, ♀ 16.- 2–16.9; metafemur: ♂ 8.0–8.4, ♀ 8.5–8.8; ovipositor: ♀ 8.0–8.3.

Distribution

China (Yunnan).

Etymology

The name of this new species is derived from the Latin words ‘ in ’ (on, at, in) and ‘ lobus ’ (lobe) indicating that the male cercus is bearing an inner lobe.

Map 1. Type localities of the genus Nigrimacula distributed in China .

Figures

Figure 3. Nigrimacula inlobata Cui, Liu & Shi sp. nov., male: (a–b) head and pronotum: (a) dorsal view; (b) lateral view; (c–f) abdominal apex: (c) dorsal view; (d) dorso-apical view; (e) lateral view; (f) ventral view; female: (g) subgenital plate in ventro-lateral view; (h) subgenital plate in ventral view; (i) ovipositor in lateral view.