Beetle ID please...Ernobius sp? - Orchesia cultriformis - BugGuide.Net

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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Cucujiformia » Tenebrionoidea » False Darkling Beetles (Melandryidae) » Melandryinae » Orchesiini » Orchesia » Orchesia cultriformis

Photo#1036667

Copyright © 2015 Britt A. Bunyard

Beetle ID please...Ernobius sp? - Orchesia cultriformis

Vermont, USA
September 13, 2014
Size: very small

Very small beetles collected from a sporulating woodrot fungus fruitbody that was attached to a paper birch tree in the forest. Forest was in northernmost part of Vermont near Canada border.

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Beetle ID please...Ernobius sp? - Orchesia cultriformis

Beetle ID please...Ernobius sp? - Orchesia cultriformis

Beetle ID please...Ernobius sp? - Orchesia cultriformis

Beetle ID please...Ernobius sp? - Orchesia cultriformis

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Contributed by Britt A. Bunyard on 28 January, 2015 - 11:11pm
Last updated 29 January, 2015 - 11:08am

Dr Pollock says:

"the terminal max. palpomere is THE best way of identifying these critters.... even the close up pic isn't that great at showing a side view of the article... however, I can pretty positively state that it's either O. gracilis Melsh. or O. cultriformis Laliberté. Based on distribution [...] I'd have to go with cultriformis, as gracilis seems not to get as far north."

Moved from Orchesia.

… v belov, 29 January, 2015 - 11:08am

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please make sure to fill the location fields

… v belov, 29 January, 2015 - 12:07am

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These beetles collected in Vermont...

from northernmost Vermont. And were likely feeding on fungal tissues or spores or both; fungus is a polypore species and a woodrotter of birch trees. Thanks so much for the help!

… Britt A. Bunyard, 29 January, 2015 - 6:29am

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can you put at least county name in the form? please?

yes, they are known to be mycophagous

also, these are not 'very small' by beetle standards; please keep in mind that size data only help if measured accurately in mm, otherwise the field is better left blank

… v belov, 29 January, 2015 - 11:06am

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Orchesia sp., hopefully further IDable

Moved from ID Request.

… v belov, 29 January, 2015 - 12:04am

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