Stenus cirrus
Creators: name: Liu, Sheng-Nan
name: Tang, Liang
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Stenus
Stenus cirrus

description: Key to species of the Stenus cirrus group of Guangxi
1 Elytra without spots....................................................................................2
- Elytra with spots..................................................................................... 3
2 Head distinctly narrower than elytra; punctation of forebody mostly well delimited; longitudinal furrow of pronotum indistinct. Habitus: Figs. 7–8; sexual characters: Figs. 41–48......................................... S. damingshanus sp. n.
- Head wider than elytra; punctation of forebody confluent; longitudinal furrow of pronotum very long and deep. Habitus: Figs. 13–14; sexual characters: Figs. 59–66 ...................................................... S. hechiensis sp. n.
3 Head narrower than elytra. Aedeagus: Fig. 3 in Puthz, 1998; BL: 3.5–4.7 mm. China: Guangxi, Zhejiang ......................................................................................... S. guangxiensis Rougemont, 1984
- Head distinctly wider than elytra........................................................................ 4
4 Elytra much shorter than width, EL/EW=0.72–0.78. Habitus: Figs 5, 6; sexual characters: Figs. 31–40. BL: 3.5–3.9 mm .................................................................... S. zhangdinghengi Pan Tang, Zhao & Li, 2012
- Elytra at most slightly shorter than width, EL/EW=0.84–1.07................................................. 5
5 Elytral spot longer, extending towards shoulder............................................................ 6
- Elytral spot shorter, not extending towards shoulder......................................................... 8
6 Smaller species, BL= 3.5–4.7 mm and FL=2.0 mm. Habitus: Figs.7–8; sexual characters: Figs 41–49. BL: 4.3 mm ........................................................................... S. maoershanus Pan Tang, Zhao & Li, 2012
- Larger species, BL= 5.3–7.9 mm and FL= 2.4–2.9 mm ....................................................... 7
7 Larger species, FL= 2.9 mm; Punctation of frons sparse; median longitudinal pronotal furrow narrow and shallow. Habitus: Figs. 11–12; sexual characters: Figs. 54–58 .............................................. S. lianhuashanus sp. n.
- Smaller species, FL= 2.4–2.8 mm; Punctation of frons dense; median longitudinal pronotal furrow wide and deep. Habitus: Figs. 1–2; sexual characters: Figs. 15–22 .................................................... S. hujiayaoi sp. n.
8 HW/EW=1.09–1.20.................................................................................. 9
- HW/EW=1.01–1.07................................................................................. .. 10
9 Larger species, BL= 3.6–5.2 mm, FL= 1.8–2.2 mm; head without distinct impunctate midline. Habitus: Figs. 3–4; sexual char- acters: Figs. 23–32 ........................................................................ S. bullatus sp. n.
- Smaller species, BL= 3.3 mm, FL= 1.6 mm; head with broad impunctate midline. Habitus: Figs. 9–10; sexual characters: Figs. 49–53 ............................................................................... S. jinxiuensis sp. n.
10 Larger species, BL= 4.3–5.2 mm; aedeagus without expulsion clasps. Habitus: Figs. 5–6; sexual characters: Figs. 33–40 .............................................................................................. S. exesus sp. n.
- Smaller species, BL=3.0– 3.5 mm; aedeagus with expulsion clasps (as in Fig. 1 in Puthz, 1983); female unknown. China: Guangxi ....................................................................... S. splendidulus Puthz, 1983
description: Published as part of Liu, Sheng-Nan & Tang, Liang, 2017, Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Guangxi, South China, pp. 238-254 in Zootaxa 4268 (2) on pages 250-251, DOI: 10.11646/zootaxa.4268.2.4, http://zenodo.org/record/580207