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beetle - Alaetrinus minimus

beetle - Alaetrinus minimus
columbia, Boone County, Missouri, USA
September 18, 2006
Size: 1/2 inch
found under a rock... ran away from me and kept playing dead

Moved from Blapstinus.

Thanks for all the clarification guys!
Can't wait till summer gets here and i can start photographing some more!! How bout you all?

I can't say I've slowed down much, although I can't use lights or sweep net during the winter. There are adults and larvae overwintering and there are some hexapods that wait till winter to emerge. Litter sifting, bark stripping, and log and branch splitting are good techniques for winter collecting/photography.

baseball has started at my high school so I've not had much time...

Moved from Blapstinus fortis.

Moved from Darkling Beetles.

This is Blapstinus

Opatrinus rather
likely, O. minimus

Blapstimus dispar
is the closest I could find in the UFL checklist of eastern tenebrionidae but it still doesn't appear to have elytral punctuation as prominent as this beetle. Compare.

Theres also another large spe
Theres also another large species, B. Fortis which is more common. The two are distinguished by the pronotal puncture. I believe dispar has elongate punctures medially, while fortis just has normal ones. Can't really see in this photo which it would be.

It's B. fortis then.
As an editor I can zoom in on this image and all pronotal punctuation appears to be consistently sized and shaped. No sign of elongate punctures. Moving image.

I take it back, not fortis!
I've just compared images of fortis with this species and the elytral punctuation is smaller on fortis. Moving back to genus.

Darking beetle.
I am pretty sure this is a darkling beetle in the family Tenebrionidae, but not sure which genus.

thanks... i'll check that out...:D

upon further investigation
i think this may be an ironclad beetle...(also called a death feigning beetle)

Cryptoglossa verrucosa

The ironclads have a bit of an hourglass shape to them that this one lacks.

ok... i'll search some more...
pretty close other than that though...

edit: this is the death feigning beetle like i said... however, they are sometimes called iron clad beetles: check out what this person said:


This is a tenebrionid. The common name is "death-feigning beetle," or "ironclad beetle." The latter name is more properly applied to Zopheridae, hence the confusion. The scientific name of this specimen is Cryptoglossa verrucosa (though it might be a closely related species). Nice images of cool critters often kept in captivity.

Another difference I note
is that the elytra of yours has large punctures along the stria whereas C. verrucosa has raised warty bumps covering the elytra.

lol... scratch that theory... more research for me!!

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