Erexitonemobius bellus He & Ma, 2021

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 : 19-22

publication ID

https://doi.org/ 10.11646/zootaxa.5011.1.1

publication LSID

lsid:zoobank.org:pub:3D1B9B5C-B0A8-4450-B135-CB0CD67C0880

persistent identifier

https://treatment.plazi.org/id/03888796-FFC0-6F45-FF45-1B3FE3DAFA2A

treatment provided by

Plazi

scientific name

Erexitonemobius bellus He & Ma
status

sp. nov.

Erexitonemobius bellus He & Ma View in CoL , sp. n.

( Figs. 16–18 View FIGURE 16 View FIGURE 17 View FIGURE 18 )

Type material. Holotype. China: Male, Xizang, Motuo, Beibeng , vi-1-2019, Libin Ma coll. ( SNNU) . Paratypes. 2 females, same information as holotype.

Description. Male. Body size small. Head small, slightly wider than the anterior of pronotum. Rostrum two times wider than antennal scape. Median ocellus oval-like and smallest of the three, lateral ocelli round. Eyes rather large. Postclypeus transverse wide, anteclypeus medially concave. 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 transverse wide, trapezoidal; anterior and posterior margins straight, posterior margin wider than the anterior, and middle of both lateral edges slightly concave. Tegmen bearing an oblique vein and three chord veins. Apical region reduced, lateral region bearing four Sc branches. Fore tibia only possessing external tympanum, oval-like. Hind tibia bearing three dorsal spurs outside and four inside, the basal two of the inside stubby; and three apical spurs on both sides respectively, basal one of the outside rather long and proximally expanded.

Genitalia. Epiphallus medially narrower than sides, lateral lobe extremely extruded and exceeding ectoparamere. Ectoparamere shaped as crab pincer and pointed inward.

Female. Similar to male but tegmina convex with longitudinal veins. Area between primary veins shiny and smooth, almost without transverse vein. Ovipositor blade-like.

Coloration. Body colored dark brown. Hind femur yellowish green dorsally with three white spots; hind tibia yellowish brown. Occiput ornamented with six dark stripes; fourth and half of fifth segment of maxillary palpi colored brown, the remainders colored dark brown.

Measurements (mm). Male. BL 5.23, HW 1.42, PL 1.25, TL 3.19, HFL 3.92. Female (n=2). BL 5.36±0.41, HW 1.42±0.15, PL 1.30±0.24, TL 2.41±0.36, HFL 4.14±0.48, OL 2.23±0.26.

Etymology. The name refers to the beautiful appearance of the species.

Genus Fibunemobius He & Ma , gen. n.

( Figs. 19–21 View FIGURE 19 View FIGURE 20 View FIGURE 21 )

Type species: Fibunemobius tamquam View in CoL sp. n., here designated.

Diagnosis. Body size small, yellowish brown. Tegmen bearing an oblique vein and three chord veins. Mirror separated into two cells. Apical region reduced, lateral region bearing four Sc branches. Fore tibia only possessing external tympanum, elongate oval-like. Hind tibia bearing four dorsal spurs outside and three inside, the first one of the inside stubby and far away from others; apical spurs two on both sides respectively. Male genitalia ( Fig. 21 View FIGURE 21 ): the middle of epiphallus deeply concave, lateral lobe inward curved and covered by upper of ectoparamere. Ectoparamere shaped as crab pincer and pointed inward.

Etymology. The name refers to the ectoparamere being shaped as a crab pincer.

Included species. Type species only.

Comparison. Fibunemobius is very similar to Pteronemobius in body shape, color and quantity of spurs on hind tibia, but has different male genitalia. This genus is also similar to Claranemobius in male genitalia, but differs in the number of spurs of hind tibia in this subfamily. It differs from other genera of Nemobiinae in male genitalia.

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