Pseudastenus Bernhauer

Busanello, Dilson G. C., Irmler, Ulrich & Caron, Edilson, 2020, Revision of Pseudastenus Bernhauer, synonym with Xenasterides Newton and six new species (Coleoptera, Staphylinidae, Paederinae), Zootaxa 4755 (1), pp. 139-154: 141-142

publication ID

https://doi.org/10.11646/zootaxa.4755.1.6

publication LSID

lsid:zoobank.org:pub:D0B3FFA8-C262-4CD6-98AB-B46C55FCEF6D

DOI

http://doi.org/10.5281/zenodo.3728591

persistent identifier

http://treatment.plazi.org/id/03C887D5-FF8F-FF8D-83C6-F9DFC3A9FE50

treatment provided by

Plazi

scientific name

Pseudastenus Bernhauer
status

 

Key to species of Pseudastenus Bernhauer  

1. Elytra shorter than pronotum, 0.9 times as long as pronotum, sides divergent to posterior margin, widest at posterior margin. ................................................................................................... 2

- Elytra longer than pronotum, ranging between 1.1 and 1.4 times as long as pronotum, sides slightly curved, widest in front of posterior margin...................................................................................... 4

2. Eyes reduced, approximately only 0.20 times as long as total length of head; postocular length more the two times longer than eyes; elytra unicolored or not conspicuously bicolored........................................................ 3

- Eyes less reduced, approximately 0.30 times as long as total length of head; postocular length only 1.6 times as long as eyes; elytra conspicuously bicolored, with distinct black anterior half......................................... P. barretoi  

3. Eyes slightly larger; postocular sides approximately parallel; elytra slightly bicolored, anterior half of elytra indistinctly darker than posterior half.......................................................................... P. ribeirocostae  

- Eyes slightly smaller; postocular sides divergent; elytra unicolored yellow................................ P. schubarti  

4. Eyes large, 0.33 times as long as total length of head; postocular length equal to eye length................... P. oculatus   - Eyes smaller, between 0.24 and 0.31 times as long as total length of head; postocular length distinctly longer than eye length ................................................................................................... 5

5. Pronotum light brown; elytra with basal half darker than apical half (in some specimens not so conspicuous)............. 6

- Pronotum rust brown to reddish; elytra with basal two-thirds darker than apical onethird................... P. ferrugineus  

6. Larger, at least 3.00 mm long; elytra bicolored, dark brown to black in anterior half and light brown in posterior half; aedeagus with apical sclerites of internal sac not elongate............................................................. 7

- Smaller, 2.20 mm long; elytra unicolored light brown; aedeagus with apical sclerites of internal sac elongate and straight............................................................................................ P. amazonicus  

7. Head light brown; median lobe of aedeagus with apical sclerites entirely narrow and S-shaped ( Figs. 46–47 View FIGURES 46–47 ).... P. plaumanni  

- Head dark brown; median lobe of aedeagus with apical sclerites broad on the basal half and not S-shaped ( Fig. 50 View FIGURES 48–54 )... P. latus