Dioctria's picture

Rove Beetle

Observed: 23rd July 2008 By: DioctriaDioctria’s reputation in InvertebratesDioctria’s reputation in InvertebratesDioctria’s reputation in InvertebratesDioctria’s reputation in InvertebratesDioctria’s reputation in Invertebrates
20080723_S5_01550b
Description:

Small rove beetle found by railway line near reedbed.

Identifications
Species interactions

No interactions present.

Comments

markgtelfer's picture

Stenus

It might be clavicornis or it might be providus. I've found it tricky to separate females and undissected males of this pair and I've often found them together.
I guess Joy's keys must still work but there's much better available:
http://markgtelfer.co.uk/beetles/staphylinidae-rove-beetles/steninae/

Dioctria's picture

Thanks Mark, I've managed to

Thanks Mark, I've managed to get a look at the clavicornis/providus couplet of the RES volume and to my naive eye this looks quite reasonable for clavicornis: Punctation pretty even across tergites, femora less than 1/4 darkened apically. Would you say that it is still not clear enough for a definitive ID?

(Using Joy is just a matter of financial necessity for a very part-time naturalist like myself. I do try and get the RES keys eventually but it sometimes has to wait a while.)

David