Polionemobius yunnanus Liu & Shi, 2014

He, Zhixin, Zhang, Tao & Ma, Libin, 2021, Crickets of subfamily Nemobiinae Saussure, 1877 (Orthoptera: Grylloidea; Trigonidiidae) from China with descriptions of new genera and new species, Zootaxa 5011 (1), pp. 1-70 : 40-43

Polionemobius yunnanus Liu & Shi, 2014

( Figs. 42–44 )

Polionemobius yunnanus Liu & Shi, 2014: 3

Materials examined. China: 3 males & 1 female, Yunnan, Gongshan , vi-14-2019, Libin Ma coll. ( SNNU) .

Description. Male. Body size small. Head small, vertex somewhat inclined and bearing setae. Rostrum protruded and slightly wider than antennal scape. Median ocellus smallest of the three, lateral ocelli oval-like. Eyes rather large. Postclypeus transverse wide, anteclypeus narrowed laterally. Apical joint of maxillary palpi slightly longer than the third, depressed and widened, with rounded apex; apical joint of labial palpi rod-like, longer than remainder sections, depressed and widened. Pronotum transversely wide, trapezoidal; anterior margin straight and the posterior somewhat convex, posterior margin wider than the anterior, middle of both lateral edges slightly concave. Tegmen bearing an oblique vein and three chord veins. Apical region degraded, lateral region bearing three Sc branches. Fore tibia only possessing external tympanum, elongate oval-like. Hind tibia bearing four dorsal spurs inside and three outside, of the inside, the first spur short and thick and the fourth long; apical spurs three on both sides respectively.

Genitalia. Epiphallus well-developed, basal margin concave and shaped as “V”; two sides of apical margin angularity, slightly curved inward; median lobe of epiphallus short, not obvious. Ectoparamere transverse and not exceeding the median lobe.

Female. Similar to male but veins are different. Ovipositor long and curved upward, colored brown.

Coloration. Body dark brown. Head brown and ornamented with five dark brown stripes on occiput; fourth joint of maxillary palpi white dorsally, dark brown ventrally. Pronotum pale brown and bearing a light stripe at the middle, lateral edges dark brown. Legs brown. Tegmen colored light brown and lateral area brown.

Measurements (mm). Male (n=4). BL 5.15±0.64, HW 1.41±0.27, PL 1.22±0.23, TL 3.16±0.41, HFL 3.89±0.63.

Female (n=2). BL 5.39±0.44, HW 1.48±0.16, PL 1.29±0.21, TL 2.45±0.37, HFL 4.11±0.51, OL 2.29±0.37.

Genus Pteronemobius Jacobson, 1904

Pteronemobius Jacobson, 1904: 450

Type species: Pteronemobius (Pteronemobius) heydenii tartarus ( Saussure, 1874)

Key to most species of Pteronemobius from China (based on adult males)

1. Pronotum almost concolorous........................................................................... 2

- Pronotum variegated, lower half of pronotal lateral lobe darker than the remainder of pronotum....................... 6

2. Apical joint of maxillary palpi variegated.................................................................. 3

- Apical joint of maxillary palpi concolorous................................................................. 4

3. Lateral viewed, lateral lobe of epiphallus and ectoparamere almost straight........................................................................................ Pteronemobius (Pteronemobius) heydenii concolor ( Walker, 1871)

- Lateral viewed, lateral lobe of epiphallus and ectoparamere somewhat curved............................................................................................. Pteronemobius (Pteronemobius) indicus ( Walker, 1869)

4. Legs colored dark........................................ Pteronemobius (Pteronemobius) yezoensis ( Shiraki, 1911)

- Legs colored pale yellow.................................. Pteronemobius (Pteronemobius) gifuensis ( Shiraki, 1911)

- Legs colored reddish brown............................................................................. 5

5. Tegmen colored light yellow............................... Pteronemobius (Pteronemobius) pilicornis Chopard, 1969

- Tegmen colored dark brown.......................................... Pteronemobius (Pteronemobius) choui sp. n.

6. Basal of 2nd and 3rd chord vein not merged................................................................ 7

- Basal of 2nd and 3rd chord vein merged................................................................... 8

7. Lateral viewed, epiphallic lateral lobe and ectoparamere somewhat curved........................................................................................... Pteronemobius (Pteronemobius) taibaiensis Deng & Xu, 2006

- Lateral viewed, epiphallic lateral lobe and ectoparamere almost straight................................................................................................... Pteronemobius (Pteronemobius) nitidus ( Bolívar, 1901)

8. Body size large and colored yellowish brown............................ Pteronemobius (Pteronemobius) litore sp. n.

- Body size small and colored dark brown............. Pteronemobius (Pteronemobius) truncates Zhang, Wang & Liu, 2020

Figures

FIGURE 42. P. yunnanus. Habitus (alive) in field. A. Male. B. Female.

FIGURE 43. Habitus photographs of P. yunnanus. A. Male. B. Female. Scale bar: 2 mm.

FIGURE 44. Male genitalia of P. yunnanus. A. Dorsal view. B. Lateral view. C. Ventral view.