Stenus tenuimargo Cameron 1930
Creators: name: Lv, Wei-Xiang
name: Zhao, Cai-Yun
name: Zhou, Hong-Zhang
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Stenus
Stenus tenuimargo

description: Key to species of the Stenus tenuimargo group from China
1. Elytra without orange spot.............................................................................. 2
- Elytra with orange spot................................................................................. 3
2. Elytra much longer than broad (EL: EW>1.3), sternum 9 apicolaterally with long teeth. Aedeagus as Figs. 19 & 20 A. Sper- matheca as Figs. 19 & 20 H............................................................. S. semilineatus Puthz
- Elytra slightly longer than broad (EL: EW <1.1), sternum 9 apicolaterally with moderate long teeth. Aedeagus as Figs. 1 E & 2 A...................................................................... S. nabanhensis Lv et Zhou, sp. nov.
3. Abdomen with distinct paratergites........................................................................ 4
- Abdomen without distinct paratergites but with a line-like lateral margination...................................... 7
4. Elytra spot broader, extending to the declining sides of elytra. Aedeagus as Figs. 5 & 6 A.......... S. jaccoudi Rougemont
- Elytral spot less broad, not extending to the declining sides of elytra............................................. 5
5. Elytra much broader than head (EW: HW>1.2). Aedeagus as Figs.17 & 18 A.......................... S. perroti Puthz
- Elytra less broad (EW: HW <1.15)........................................................................ 6
6. Paratergites with only one row of punctures. Aedeagus as Figs. 11–14 A. Spermatheca as Figs. 11 & 12 H.................................................................................................. S. notaculipennis Puthz
- Paratergites with dense, side by side punctures. Aedeagus as illustrated in Rougemont (1983b: Fig. 19) ..................................................................................................... S. subthoracicus Puthz
7. Species from Taiwan, elytra relatively broad................................................................ 8
- Species from Continental China, elytra less broad........................................................... 11
8. Elytra longer (EW: EL<0.92 [0.88–0.94]), elytral spot distinctly extending into anterior half of elytra.................. 9
- Elytra shorter (EW: EL>0.92 [0.93–0.98])................................................................ 10
9. Abdominal punctuation coarse and dense. Aedeagus as Puthz (2011: Fig. 107). Spermatheca as Puthz (2011: Fig. 21). BL: 5.0– 6.0 mm (FB: 2.6–2.8 mm)................................................................ S. miwai Bernhauer
- Abdominal punctuation less coarse, sparser. Aedeagus as Puthz (2011: Fig. 108). Spermatheca as Puthz (2011: Fig. 20). BL: 5.0–6.0 mm (FB: 2.4–2.7 mm)............................................................ S. mithracifer Puthz
10. Elytral spot smaller, not extending to the posterior margin of elytra, abdominal punctuation less coarse. Aedeagus as Puthz (2011: Fig. 116). Spermatheca as Puthz (2011: Fig. 16). BL: 5.5–6.5 mm (FB: 2.4–2.7 mm)........ S. electrigemmeus Puthz
- Elytral spot larger, extending to the posterior margin of elytra, abdominal punctuation coarser. Aedeagus as Puthz (2011: Fig. 19). Spermatheca unknown. BL: 6.5 mm (FB: 2.6 mm)..................................... S. electrigemmatus Puthz
11. Micropterous....................................................................... S. marginiventris Puthz
- Macropterous........................................................................................ 12
12. Abdominal punctuation coarser and extremely dense, interstices on tergite VII smaller than half diameter of punctures; smaller. Aedeagus as Figs. 21 &. 22 A............................................................. S. solstitialis Zheng
- Abdominal punctuation less coarse or sparser, interstices on tergite VII distinctly larger than half diameter of punctures... 13
13. Elytra trapeziform, elytral spot longer.................................................................... 14
Elytra subquadrate, elytral spot smaller................................................................... 15 14. Elytral spot about 2/3 as long as one elytron. Aedeagus as Puthz (2013b: Fig. 401) ............. S. grandimaculatus Benick
- Elytral spot smaller, about 1/3 as long as one elytron. Aedeagus as Figs. 15 & 16 A. Spermatheca as Figs. 15 & 16 H............................................................................................... S. oculifer Puthz
15. Punctation of tergite VII denser, interstices about as wide as diameter of punctures. Aedeagus as Figs. 3 E & 4 A. Spermatheca as Figs. 3 I & 4 H...................................................... S. zhangyejunianus Lv et Zhou, sp. nov
- Punctation of tergite VII sparser, interstices much wider than diameter of punctures. Aedeagus as Figs. 23 & 24 A............................................................................................ S. tenuimargo Cameron
description: Published as part of Lv, Wei-Xiang, Zhao, Cai-Yun & Zhou, Hong-Zhang, 2018, Taxonomy of Stenus tenuimargo group (Coleoptera, Staphylinidae, Steninae) with descriptions of two new species from China, pp. 490-516 in Zootaxa 4394 (4) on pages 491-492, DOI: 10.11646/zootaxa.4394.4.2, http://zenodo.org/record/1199912