Polionemobius ebony, Wu & Ma, 2022

Wu, Qian & Ma, Li-Bin, 2022, A new species of pygmy crickets and synonyms of a genus and a species of sword-tail crickets (Orthoptera: Trigonidiidae: Nemobiinae and Trigonidiinae) from China, Zootaxa 5213 (2), pp. 169-176 : 170-172

Polionemobius ebony sp. nov.

Chinese name: 乌AE灰flffi

Figs. 1 , 2 , 3 , 5A, 5C

Type materials. Holotype. China: Male, Wuyanling Nature Reserve , Taishun County, Zhejiang Province, 18-IX-2022, Ning Wang coll. Paratypes. 4 males and 4 females, Wuyanling Nature Reserve , Taishun County, Zhejiang Province, 18-IX- 2022, Ning Wang coll. ; 2 females, Tianmu Mountains, Lin'an District , Zhejiang Province, 2-IX-2022, Ning Wang coll.

Etymology. The name refers to the dark brown antennae of this species.

Description. Male. Body size small. Head pilose, slightly wider than anterior margin of pronotum. Frontal rostrum nearly as wide as antennal scape. The antennal scape round shield-shaped. Face transversely broad. Median ocellus transversely ovoid, distinctly smaller than lateral ones; lateral ocelli approximately rounded. Postclypeus narrowly banded, angular on both sides; anteclypeus round shield-shaped. Labrum shield-like. The end section of the maxillary palpi triangular, distinctly longer than the third segment. Pronotum approximate rectangular shape, both anterior and posterior margin straight. Tegmina reach abdominal apex, bearing one oblique vein and three chord veins. Mirror inconspicuous, with one dividing vein. Apical field undeveloped. Wings invisible. Outer tympanum transversely ovoid and the inner one absent. Femora villous. Inner dorsal spurs of hind tibia numbered three or four and the outer numbered three. The outer apical spurs three and the inner three, inner apical spurs longer than the outer ones.

Male genitalia. In dorsal view, epiphallus medially shorter than both sides, the end of ectoparamere blunt and inward curved. In lateral view, ectoparamere armed with dorsal lobe apically angular and ventral lobe papillae, and dorsal lobe slightly shorter than the ventral.

Female. Similar to males, but tegmina not reaching abdominal end. Ovipositor dagger-shaped, brown; the third valvulae of ovipositor with teeth at the end.

Coloration. Body and antennae dark brown. Maxillary palpi apex and second segment white. Legs light brown.

Measurements. Male (n=5). BL 4.93±0.04, HL 0.8±0.04, HW 1.43±0.03, PL 0.99±0.09, PW 1.64±0.02, FWL 2.64±0.05, HFL 3.2±0.16; Female (n=6). BL 4.82±0.45, HL 0.74±0.03, HW 1.47±0.06, PL 0.94±0.05, PW 1.52±0.03, FWL 1.80±0.03, HFL 3.10±0.02, OL 1.86±0.04.

Remarks. This species bears similar appearance with Polionemobius flavoantennalis Shiraki, 1911 , but the base of antennae of this species are dark brown, while P. flavoantennalis has a white section at the base of antennae. In dorsal view of male genitalia ( Figs. 3A , 4A ), epiphallus of P. ebony is narrower than P. flavoantennalis and the end of ectoparamere inward curved. In lateral view ( Figs. 3B , 4B ), the dorsal lobe of both ectoparamere angular, the ventral lobe of P. ebony is more ossified than that of P. flavoantennalis , and the ventral lobe is almost flush with the dorsal lobe, while the ventral lobe of P. flavoantennalis is significantly longer than the dorsal.

Figures

FIGURE 1. Distribution of P. ebony and Z. dian in China.

FIGURE 2. Body of P. ebony sp. nov. A. Male; B. Female. Scale bar: 2 mm.

FIGURE 3. Genitalia of P. ebony sp. nov. A. Dorsal view; B. Lateral view; C. Ventral view.

FIGURE 4. Genitalia of P. flavoantennalis. A. Dorsal view; B. Lateral view; C. Ventral view.

FIGURE 5. Lateral view of female and ovipositor. A and C. P. ebony sp. nov.; B and D. Z. dian. Scale bar: 2 mm.