Stenus cirrus

Tang, Liang, Liu, Sheng-Nan & Dong, Xin-Yu, 2018, Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China, Zootaxa 4425 (3), pp. 527-540: 539

publication ID

https://doi.org/10.11646/zootaxa.4425.3.6

publication LSID

lsid:zoobank.org:pub:95B002AE-E58E-42A3-BD5A-47A4A6BE9AB9

persistent identifier

http://treatment.plazi.org/id/8B018790-FF8E-A714-FF11-FF3B1BAC0D2D

treatment provided by

Plazi

scientific name

Stenus cirrus
status

 

Key to species of the Stenus cirrus  group of Sichuan 

1 Hind legs with tarsomeres IV simple...................................................................... 2

- Hind legs with tarsomeres IV distinctly bilobed.............................................................. 3

2 Abdominal tergites without reticulation. BL= 2.6–2.8 mm, FB= 1.3 mm. Aedeagus: Fig. 5 in Puthz, 2012................................................................................................. S. beckeri L. Benick, 1941 

- Last abdominal tergites reticulated. BL= 2.3–2.8 mm, FB= 1.2–1.3 mm. Aedeagus: Fig. 6 in Puthz, 2012............................................................................................... S. erlangmontium Puthz, 2012 

3 Abdominal segments III and IV with paratergites............................................................ 4

- Abdominal segments III and IV without paratergites.......................................................... 5

4 Abdominal segments V and VI with paratergites. BL: 4.1–4.3 mm, FL: 2.0 mm. Habitus: Fig. 3; sexual characters: Figs. 22–27........................................................................................ S  View Figure . lineatus sp. n.

- Abdominal segments V and VI without paratergites. BL: 4.2–4.6 mm, FL: 1.9–2.3 mm. Habitus: Fig. 7; sexual characters: Figs. 44–49.......................................................................... S  View Figure . brevilineatus sp. n.

5 Elytra stout with EL/EW=0.75–0.76; pronotum bicolor with lateral portions distinctly lighter. BL: 4.1–4.5 mm, FL: 1.8–1.9 mm. Habitus: Fig. 6; sexual characters: Figs. 40–43.......................................... S  View Figure . xichangensis sp. n.

- Elytra slender with EL/EW≥0.85; pronotum unicolor......................................................... 6

6 Head distinctly narrower than elytra, macropterous. BL= 3.3–4.5 mm, FL: 1.9–2.1 mm. Aedeagus: Fig. 4 in Puthz, 1998.................................................................................... S. aeneonitens Puthz, 1998 

- Head distinctly wider than elytra, brachypterous............................................................. 7

7 Smaller species, BL= 3.2–3.3 mm, FL= 1.5 mm; head black and rest parts reddish brown. Habitus: Fig. 5; sexual characters: Figs. 34–39......................................................................... S  View Figure . jiudingshanus sp. n.

- Larger species, BL≥ 3.7mm, FL≥ 1.8 mm; body with different coloration.......................................... 8

8 Elytra with distinct spots, disk relatively even, punctation distinctly wider than apical cross section of antennal segment II. BL: 3.7–4.9 mm, FL: 1.8–2.1 mm. Habitus: Fig. 4; sexual characters: Figs. 28–33....................... S  View Figure . emeishanus sp. n.

- Elytra with indistinct spots or without spots, disk uneven, punctation as wide as apical cross section of antennal segment II....................................................................................................... 9

9 Larger species; elytra broader than long. BL: 4.6–5.2 mm, FL: 2.0– 2.3 mm. Habitus: Fig. 1; sexual characters: Figs. 8–15....................................................................................... S  View Figure . cariniventris sp. n.

- Smaller species; elytra at least as long as wide. BL: 4.0– 4.1 mm, FL: 1.9–2.0 mm. Fig. 2; sexual characters: Figs. 16–21........................................................................................... S  View Figure . jiangrixini sp. n.

Kingdom

Animalia

Phylum

Arthropoda

Class

Insecta

Order

Coleoptera

Family

Staphylinidae

Genus

Stenus