Nomia (Gnathonomia) fusciventris Zhang & Niu, 2020

Zhang, Dan, Niu, Ze-Qing, Orr, Michael C., Ascher, John S. & Zhu, Chao-Dong, 2020, Chinese species of Nomia (Gnathonomia) Pauly, 2005 (Hymenoptera: Apoidea Halictidae: Nomiinae), Zootaxa 4768 (1), pp. 76-94 : 78-80

publication ID	https://doi.org/ 10.11646/zootaxa.4768.1.5
publication LSID	urn:lsid:zoobank.org:pub:B5409282-6539-4486-8C7A-CF38FE15C955
DOI	https://doi.org/10.5281/zenodo.3795462
persistent identifier	https://treatment.plazi.org/id/E61F577E-880F-C249-95EE-FAA3CEF7FD8C
treatment provided by	Plazi
scientific name	Nomia (Gnathonomia) fusciventris Zhang & Niu
status	sp. nov.

Treatment

Nomia (Gnathonomia) fusciventris Zhang & Niu , sp. nov.

( Figs 1–2 View FIGURE 1 View FIGURE 2 )

Diagnosis. Male distinguished from other species of subgenus Gnathonomia as follows: apical margin of T1–5 without conspicuous white bands ( Fig. 1c, 1e View FIGURE 1 ); T2–4 with apical hair bands reduced, restricted to lateral edges ( Fig. 1e View FIGURE 1 ); upper lateral surface of propodeum with sparse, coarse punctures, narrow shiny interspaces ( Fig. 1e View FIGURE 1 ); hind femur slightly developed ( Fig. 1b, 1d View FIGURE 1 ); penis valve with hooked projection basically ( Fig. 2a View FIGURE 2 ).

Description. Male. Measurements are of the holotype only. BL= 10 mm ( Fig. 1c View FIGURE 1 ), body blackish-brown. Head. HL: HW=0.86, head broader than long ( Fig. 1a View FIGURE 1 ); GW: EW=0.80, eye obviously broader than gena; clypeus broader than long ( Fig. 1a View FIGURE 1 ); clypeus, paraocular area, and vertex with dense large punctures ( Fig. 1a View FIGURE 1 ); mandible blackishbrown, with tooth on the upper margin medially; frons with smooth frontal line medially ( Fig. 1a View FIGURE 1 ); vertex behind lateral ocellus with shiny line; vertex with rounded posterior margin ( Fig. 1c View FIGURE 1 ); antenna reaching the middle of mesoscutum; scape slightly enlarged; F1 nearly as long as broad, nearly 0.5 times as long as F2; F2–11 equal in length, nearly twice as long as broad ( Fig. 1a View FIGURE 1 ); ocelli normal, not enlarged; ocellar diameter narrower than ocellocular distance ( Fig. 1a View FIGURE 1 ). Mesosoma. Mesoscutum, scutellum, and metanotum dull, with dense large punctures ( Fig. 1b, 1c View FIGURE 1 ); metanotum normal, without process ( Fig. 1b View FIGURE 1 ); pronotal lobe defined by sharp carina; upper lateral surface of propodeum with dense coarse punctures, separated by narrow shiny interspaces; metapostnotum with narrow longitudinal wrinkles; inclined part of metapostnotum narrowly triangular and shiny ( Fig. 1b View FIGURE 1 ); fore wing with three submarginal cells, 1 st submarginal cell nearly equal to 3 rd submarginal cell in length, almost twice as long as 2 nd submarginal cell; tegula normal, not enlarged ( Fig. 1c View FIGURE 1 ); legs reddish-brown; hind femur slightly developed; apical margin of hind tibia slightly extended ( Fig. 1d View FIGURE 1 ); hind tibia spur curved ( Fig. 1d View FIGURE 1 ). Metasoma. Metasomal terga dull, densely and minutely punctuate; apical margin of T2–5 with transparent bands ( Fig. 1e View FIGURE 1 ); S5 rounded apically, with hair tuft medially ( Fig. 2a View FIGURE 2 ); S6 deeply thickened apically ( Fig. 2b View FIGURE 2 ); S7 as showing in Fig. 2e; S View FIGURE 2 8 View FIGURE 8 as showing in Fig. 2f View FIGURE 2 ; gonostylus doubled, as showing in Fig. 2a View FIGURE 2 (in ventral view) and Fig. 2b View FIGURE 2 (in lateral view). Pubescence. Clypeus, paraocular area, supraclypeal area and frons with sparse yellowish hairs ( Fig. 1 View FIGURE 1 ); mesoscutum, scutellum and metanotum with sparse short hairs ( Fig. 1 View FIGURE 1 b–c); upper lateral surface of propodeum with sparse long yellowish hairs ( Fig. 1b View FIGURE 1 ); legs with sparse short hairs; metasomal terga with sparse yellowish hairs ( Fig. 1c, 1e View FIGURE 1 ); T2–4 with apical hair bands reduced, restricted to lateral edges ( Fig. 1e View FIGURE 1 ); S3–4 with dense long yellowish hairs ( Fig. 1f View FIGURE 1 ).

Female. Unknown.

Type materials. Holotype, 1 ♂, China: Fujian: Chongan, Guanguanping (27°47′29″N, 117°41′51″E), 1073 m, 24 VIII.1960, leg. Chen-Lin Ma. GoogleMaps Paratype, 1 ♂, same label information as the holotype.

Distribution. China (Fujian).

Floral association. Unknown.

Etymology. The name “fusciventris” is a combined Latin noun, “fuscus” + “venter”, referring to the dark, blackish-brown metasomal terga.

Remarks. We describe N. fusciventris sp. nov. as a new species of subgenus Gnathonomia in this study. Male of this species is similar to N. pieli and N. radiata ( Pauly, 2009) , the latter not examined but evaluated based on images from Atlas Hymenoptera (http: //www.atlashymenoptera. net/pageasp?ID=136). We found that the two abovementioned previously-described species have basal hair bands on T3–4, while the new species has apical hair bands reduced, and restricted to lateral edges. In addition, Nomia pieli can be distinguished from N. fusciventris sp. nov. by basal hair band form as given above. In addition, these species differ in genitalia, i.e. N. fusciventris sp. nov., has a penis valve with hooked projection basally, whereas the penis valve of N. pieli lacks a projection basally. The shape of S7 and S8 of N. pieli and N. fusciventris sp. nov. also differ ( Fig. 2 View FIGURE 2 , Fig. 11 View FIGURE 11 ). Further study, preferably informed by molecular diagnostic characters, is necessary to associate the unknown female of this species.