Nomia (Gnathonomia) fusciventris Zhang & Niu & Orr & Ascher & Zhu 2020, sp. nov.
Creators: name: Zhang, Dan
name: Niu, Ze-Qing
name: Orr, Michael C.
name: Ascher, John S.
name: Zhu, Chao-Dong
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Halictidae
Nomia
Nomia fusciventris

description: Nomia (Gnathonomia) fusciventris Zhang & Niu, sp. nov.
(Figs 1–2)
Diagnosis. Male distinguished from other species of subgenus Gnathonomia as follows: apical margin of T1–5 without conspicuous white bands (Fig. 1c, 1e); T2–4 with apical hair bands reduced, restricted to lateral edges (Fig. 1e); upper lateral surface of propodeum with sparse, coarse punctures, narrow shiny interspaces (Fig. 1e); hind femur slightly developed (Fig. 1b, 1d); penis valve with hooked projection basically (Fig. 2a).
Description. Male. Measurements are of the holotype only. BL= 10 mm (Fig. 1c), body blackish-brown. Head. HL: HW=0.86, head broader than long (Fig. 1a); GW: EW=0.80, eye obviously broader than gena; clypeus broader than long (Fig. 1a); clypeus, paraocular area, and vertex with dense large punctures (Fig. 1a); mandible blackishbrown, with tooth on the upper margin medially; frons with smooth frontal line medially (Fig. 1a); vertex behind lateral ocellus with shiny line; vertex with rounded posterior margin (Fig. 1c); 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); ocelli normal, not enlarged; ocellar diameter narrower than ocellocular distance (Fig. 1a). Mesosoma. Mesoscutum, scutellum, and metanotum dull, with dense large punctures (Fig. 1b, 1c); metanotum normal, without process (Fig. 1b); 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); 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); legs reddish-brown; hind femur slightly developed; apical margin of hind tibia slightly extended (Fig. 1d); hind tibia spur curved (Fig. 1d). Metasoma. Metasomal terga dull, densely and minutely punctuate; apical margin of T2–5 with transparent bands (Fig. 1e); S5 rounded apically, with hair tuft medially (Fig. 2a); S6 deeply thickened apically (Fig. 2b); S7 as showing in Fig. 2e; S 8 as showing in Fig. 2f; gonostylus doubled, as showing in Fig. 2a (in ventral view) and Fig. 2b (in lateral view). Pubescence. Clypeus, paraocular area, supraclypeal area and frons with sparse yellowish hairs (Fig. 1); mesoscutum, scutellum and metanotum with sparse short hairs (Fig. 1 b–c); upper lateral surface of propodeum with sparse long yellowish hairs (Fig. 1b); legs with sparse short hairs; metasomal terga with sparse yellowish hairs (Fig. 1c, 1e); T2–4 with apical hair bands reduced, restricted to lateral edges (Fig. 1e); S3–4 with dense long yellowish hairs (Fig. 1f).
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. 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, Fig. 11). Further study, preferably informed by molecular diagnostic characters, is necessary to associate the unknown female of this species.
description: Published as part of 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), pp. 76-94 in Zootaxa 4768 (1) on pages 78-80, DOI: 10.11646/zootaxa.4768.1.5, http://zenodo.org/record/3777860