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Tenebrionidae, dorsal - Diaperis maculata

Tenebrionidae, dorsal - Diaperis maculata
Plymouth Rock, Winneshiek County, Iowa, USA
May 27, 2008
Size: 5+mm
Collected under bark of dead stump in lots of sawdust
Looks like Edomychidae but not Endomychus biguttatus (Marshall's "Insects, Their natural History & Diversity)
But I don't know.

Images of this individual: tag all
Tenebrionidae, dorsal - Diaperis maculata Tenebrionidae, lateral - Diaperis maculata Tenebrionidae, dorsal-lateral - Diaperis maculata Tenebrionidae, antenna - Diaperis maculata Tenebrionidae, tarsal claws - Diaperis maculata

Moved from Darkling Beetles.

That's it! (And that's not the first time I've been confused by a Tenebrionidae...nor the last.) Thanks Skip.

Yeah with smooth claws Tenebr
Yeah with smooth claws Tenebrionidae is the next closest in my key too. They are really tricky, awsome to know species too.

Tarsal claws are all smooth o
Tarsal claws are all smooth on the inside.

I think this is a member of the Family Alleculidae. If you still have it the clincher is if there is a fine sawtooth like edge on the inside of it's tarsal claws (called pectinate). They are found under bark, which seems to fit in this case. My key is a little older and it looks like these guys might have been merged with some other groups, but yours looks very much like the examples at the end of the key (even if it doesn't look so much like the ones listed on bug guide at the moment)

Though pretty atypical, it is a tenebe, Diaperis maculata.

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