Pteronemobius luojishanensis Ma, Yuan & Gu, 2022

Yuan, Wei, Zheng, Yan-Na, Ma, Li-Bin & Gu, Jun-Jie, 2022, New species of the genera Trigonidium Rambur, 1838 and Pteronemobius Jacobson 1904 from China (Orthoptera: Grylloidea; Trigonidiidae; Trigonidiinae and Nemobiinae), Zootaxa 5162 (5), pp. 593-600 : 597-598

Pteronemobius luojishanensis Ma, Yuan & Gu sp. nov.

( Figs 1A, B , 5 , 6 , 7 )

urn:lsid:zoobank.org:act:154912E1-6062-42F0-ADC1-83A8C92AA5DB

Chinese name: ḆṞ山异ħDz

Etymology. The name is based on the collection site.

Holotype. China: Male, Sichuan, Xichang , Luojishan. 27.578°N, 102.425°E. 29-III-2022, coll. Wei Yuan and Chengjie Zheng ( SICAU) . Paratypes. 2 males & 5 females, with similar information of the holotype ( SICAU) ; 2 males & 4 females, same collection information as the holotype ( SNNU) .

Description. Male. ( Figs. 1B , 5B , 7A ) The body is uniformly black except tegmen dark brown.

Head ( Fig. 7E ). Vertex protruding; frontal rostrum not obvious; compound eyes developed, median ocellus oval-like and smallest, lateral ocelli slightly rounded; antennal scape shield shaped, approximately equal to rostrum in width; apical joint of maxillary palpus longer than the third, depressed and widened, with rounded apex; apical joint of labial palpus rod-like.

Pronotum. Anterior, posterior and lateral margin with several long setae; disc covered fine hairs. Tegmen half the abdominal length; mirror present, dividing vein in middle; apical field short but with a row of large cells; chordal area with three veins, lateral field with 3 parallel longitudinal veins; hind wings absent. Fore femur and middle femur with several long setae; pro-basitarsus, meso-basitarsus and second tarsomere with two apical spines; fore tibia with tympana present on outer side only, with three apical spurs; middle tibia with one apical spur only; hind tibia bearing three dorsal spurs on two sides respectively, of the inside, first spur stubby and removed from others, the basal of third one expanded, apical spurs three inside and outside respectively.

Genitalia ( Figs. 6A, B, C ). In dorsal view, the middle of epiphallus particularly narrowed, widened on both sides; lateral lobes widened and curved inward; ectoparamere rounded, distalis hook-like and bend inward.

Female ( Figs. 1A , 5A , 7B, 7F ). Similar to male but forewings short, veins are different, transverse apically; ovipositor blade-like.

Measurements. Male (n=2). BL 5.52±0.22, PL 0.94±0.10, TL 2.23±0.15, HFL 2.73±0.06; Female (n=2). BL 5.41±0.25, PL 0.88±0.05, TL2.68±0.12, MFL 3.12±0.10 PL 1.81±0.25.

Remarks. This new species is distinguished from other members of the genus by its black body, distinctive wing venation and unique male genitalia. Compared with other Pteronemobius species from China, P. luojishanensis sp. nov. has transverse tegmina with few small cells in the apical area in males. The new species is similar to Pteronemobius yezoensis Shiraki, 1911 in body size, but differs in transverse tegmina. It is similar to Pteronemobius kangdingensis Liu et Shi, 2014 in body shape, but differs in its larger body size, black legs, transverse tegmina and hook-like ectoparamere.

Figures

FIGURE 1. Habitus (alive) of P. luojishanensis sp. nov. and T. nigripes sp. nov. A. P. luojishanensisi, female; B. P. luojishanensis, male; C. T. nigripes, female; D. T. nigripes, male. Photographed by He, Zhixin.

FIGURE 5. Habitus photographs of P. luojishanensis sp. nov. A. female; B. male. Scale bar: 2 mm.

FIGURE 6. Male genitalia of P. luojishanensis sp. nov. A. Dorsal view; B. Lateral view; C. Ventral view. Scale bar: 0.1 mm.

FIGURE 7. Photograph of Pteronemobius luojishanensis sp. nov. A. Lateral view of male B. Lateral view of female C. Male tegmen D. Female tegmen E. Dorsal view of head F. Female ovipositor in lateral view Scale bar: 0.5 mm.