Gnathonomia 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
Gnathonomia

description: Key to the Chinese species of subgenus N. (Gnathonomia)
(Female of N. fusciventris Zhang & Niu, sp. nov. unknown, females of N. aurata and N. wahisi were not examined here, characters adapted from Pauly (2009))
1 Female: Flagellum with 10 segments..................................................................... 2
- Male: Flagellum with 11 segments....................................................................... 5
2 Mesoscutum and scutellum completely covered by dense short felt-like hairs (Fig. 9b)..................... N. thoracica
- Mesoscutum and scutellum with sparse long hairs (Fig. 12c) …................................................. 3
3 Apical margin of T1–4 with white or yellowish bands................................................. N. aurata
- Apical margin of T1–4 nearly transparent …............................................................... 4
4 T3–4 with basal hair bands, possibly obscured by prior segment (Fig. 12e) …................................ N. pieli
- T3–4 without basal hair bands ….................................................................. N. wahisi
5 Mesoscutum and scutellum completely covered by dense short felt-like hairs (Fig. 7a)..................... N. thoracica
- Mesoscutum and scutellum with sparse long hairs (Fig. 1c)..................................................… 6
6 Hind tibia with large projection (Figs 3e, 5f); hind femur strongly developed (Figs 3e, 5f); apical margin of T2–5 with colored bands (on T1 absent sometimes) …....................................................................... 7
- Hind tibia without large projection (Figs 1d, 10d); hind femur weakly developed (Figs 1d, 10d); apical margin of T1–5 without conspicuous colored bands............................................................................. 8
7 Hind tibia with tooth-like projection and rectangle swollen projection apically (Fig. 5f); metapostnotum with narrow longitudinal wrinkles (Fig. 5d).......................................................................... N. wahisi
- Hind tibia only with weakly C-shaped projection apically, without swollen projection (Fig. 3e); metapostnotum with broad longitudinal wrinkles (Fig. 3c)................................................................... N. aurata
8 Upper lateral surface of propodeum with dense, nearly confluent punctures, without narrow shiny interspaces (Fig. 10f); T3–4 with stronger basal hair bands across much of basal (Fig. 10e)............................................ N. pieli
- Upper lateral surface of propodeum with sparse, coarse punctures, narrow shiny interspaces (Fig. 1b); T3–4 with smaller apical hair bands reduced to side (Fig. 1e)......................................... N. fusciventris Zhang & Niu, sp. nov.
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 page 78, DOI: 10.11646/zootaxa.4768.1.5, http://zenodo.org/record/3777860