andyk's picture

Help......

Observed: 8th February 2011 By: andyk
London Natural History Society
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Dorsal view
Ventral view
Head and pronotum - dorsal
Mouthparts
Elytra detail
Apex of elytra
Leg 1 - antennal cleaner
Setae on mandible
Description:

Found in the frass in a rot hole in an oak tree.
I'm probably having a 'senior moment' but am having great difficulty in keying this one.

Identifications
Species interactions

No interactions present.

Comments

andyk's picture

A. flavipes

Thanks Altus. However, looking through the Luff key the specimen seems to match A. curtum more exactly - 'legs entirely pale or gradually darkened' and from species description ' Pronotum transverse, sides sharply angled at median seta and with a small keel at hind angles'(pics 1 & 3).

Andy Keay

altus silva's picture

Might be A. curtum, as well

Hello Andy.
I did not know this species occurs in UK...

Hard to tell the two from photos (sometimes hard under a binocular too).

andyk's picture

A. curtum

From Luff: 'Probably widespread in Britain and Ireland; abundant'.

The small keel at the hind angle of the pronotum seems to be a good character to separate curtum from flavipes - you can see it quite well in the 3rd pic above.

Andy Keay

Martin Harvey's picture

curtipes

Andy, can you add A. curtipes as a third identification? The pale antennae seem to point to that species as well.

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Entomologist and biological recorder