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Photo#43992
Stenus rove beetle? - Cafius seminitens

Stenus rove beetle? - Cafius seminitens
Venice Beach State Park, San Mateo County, California, USA
March 2, 2006
Found him under some dried kelp that had washed ashore on the beach. I know there is a genus of Roves that like to do that. Is it Stenus? Any help would be great!

Moved
Moved from Cafius.

Staphylinidae: Staphylininae
It is one of the staphylinine genera - far from Stenus. Possibly a Platydracus if about 25 mm, perhaps a Cafius if about 12. Stating the size is very helpful if you wish staphylinids identified.

 
Size:
The size was about 15mm I'd estimate. Does the fact that it lived under seaweed help?

 
Staphylinidae: Staphylininae: Cafius sp.
As Phillip has indicated, based on size and habitat it is almost certainly a Cafius. The classic habitat for this small genus is beneath wrack at the seashore.

 
Thanks!
Thanks a lot for all your help, that makes my 59th family of insect I've photographed!

 
many, many, many spp.
Just to get an idea, see the California list. Tough group. Cafius sp. sure looks possible, right habitat.

Moore, I. 1964 The Staphylinidae of the marine mud flats of southern California and northwestern Baja California (Coleoptera: Staphylinidae). Trans. San Diego Soc. Nat. Hist. 13, 269-284

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