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Coleoptera, dorsal lateral - Eucinetus haemorrhoidalis

Coleoptera, dorsal lateral - Eucinetus haemorrhoidalis
100 Acre Wood, Winneshiek County, Iowa, USA
July 27, 2010
Size: 3 mm
Interesting pattern on elytra
black lighting

Images of this individual: tag all
Coleoptera, dorsal lateral - Eucinetus haemorrhoidalis Coleoptera, ventral - Eucinetus haemorrhoidalis Coleoptera, dorsal - Eucinetus haemorrhoidalis

sorry, MJ -- my bad, picked the wrong one

How is E. haemorrhoidalis distinguished from E. terminalis? I have been using Blatchley's key and E. haemorrhoidalis is not included.

good question
Perhaps they have been synonomized? If so, when was this done? We have both species in the guide right now.

American Beetles (1) lists E. terminalis but no E. haemorrhoidalis. Majka (2) records E. haemorrhoidalis but doesn't mention its relationship to E. terminalis.

I'm also wondering about this...
They seem very similar in appearance from the photos in the guide and co-occur in many states/provinces. Any update as far as literature for separating these species? I'm looking at beetles from western Canada and both species are listed in the 2013 Checklist of Beetles of Canada and Alaska...

I just BLASTed the BOLD nucleotide sequences for haemorrhoidalis and it does seem to partition from terminalis, which supports that these are distinct species. However, the plot thickens, as the only BOLD sequence of "haemorrhoidalis" from the nearctic (Alaska) should actually be terminalis based on the sequences and is not aligned with the other haemorrhoidalis sequences from the palearctic...

Hopefully we'll figure it out at some point
I suppose Dan Young or Chris Majka would be who to ask.

Very cool indeed
It's another FAMILY I've never heard of.
Sometimes when I post, in my head, I've got a pretty good guess what something is. And sometime, in my head, it's just a big dark nothing at all.

Moved from Beetles.

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