Polionemobius ebony Wu & Ma, 2022

Wang, Rui & Ma, Li-Bin, 2023, Polionemobius gyirongensis sp. nov. from Tibet, China, and the identification of the species Polionemobius ebony Wu & Ma, 2022 and its close relative (Orthoptera: Trigonidiidae; Nemobiinae), Zootaxa 5339 (4), pp. 390-396 : 394-395

Polionemobius ebony Wu & Ma, 2022

Chinese name: ḜŽṱ‼ẽ

Figs. 4 , 5A, 5B

Polionemobius ebony Wu & Ma, 2022: 170

Materials examined. 5 males and 3 females, Wuyanling Nature Reserve , Taishun County, Zhejiang Province, 18.ix.2022, Ning Wang coll. ( SNNU) .

Description. Male. Body-size small. Head pubescent. Pronotum rectangular in dorsal view. Tegmina reaching the end of the abdominal apex. One oblique vein and three chord veins. Apical field undeveloped. Hind wings invisible. Anterior tibia only bearing an outer tympanum. Inner dorsal spurs of the posterior tibia numbered three or four and the outer numbered three. Six apical spurs, both inner and outer three.

Male genitalia. Epiphallus concave at tip and base, ectoparamere apically concave. In lateral view, ectoparamere tapering from base to tip, tip papillate.

Female. Similar to males, but tegmina not reaching the end of the abdomen and only with longitudinal veins. Ovipositor knife-like, two-thirds of the posterior tibia.

Coloration. Body dark brown. Feet light brown, ovipositor gradually turning dark brown from base to tip.

Measurements. Male (n=6). BL 5.74±0.81, HL 0.78±0.02, HW 1.53±0.10, PL 1.01±0.02, PW 1.70±0.06, FWL 2.91±0.27, HFL 2.84±0.36; Female (n=4). BL 5.22±0.40, HL 0.74±0.03, HW 1.47±0.06, PL 1.01±0.07, PW 1.66±0.14, FWL 1.93±0.13, HFL 2.95±0.15, OL 1.78±0.18.

Remarks. This species bears a similar appearance to P. nigriscens (Ichikawa, Murai, & Honda, 2000) , but the epiphallus of this species narrower and more concave ( Fig. 5 ). In P. ebony when viewed from the dorsal surface where the ectoparamere at the point of the arrow curves ventrally to the dorsal surface and is ossified at the end, whereas, this feature is not visible on the dorsal surface of P. nigriscens ( Fig. 5 ). The comparison reveals that P. ebony is indeed a different species from P. nigriscens .

Figures

FIGURE 4. Body of P. ebony. A. male; B. female (Note: figures after Wu & Ma, 2022). Scale bar: 2 mm.

FIGURE 5. Genitalia. A–B. P. ebony; C–D. P. nigriscens. A, C. dorsal view; B, D. ventral view. (Note: The arrow of A means ectoparamere that can be seen from the back; C, D are modeled after Ichikawa et al., 2000).