unknown beetle - Rhizophagus sayi - BugGuide.Net

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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles (Polyphaga) » Series Cucujiformia » Sap, Bark and Fungus Beetles (Cucujoidea) » Minute Clubbed Beetles (Monotomidae) » Rhizophagus » subgenus Rhizophagus (Rhizophagus subgenus Rhizophagus) » Rhizophagus sayi

Photo#1157443

Copyright © 2015 Glenn A. Salsbury

unknown beetle - Rhizophagus sayi

Frontenac,, Crawford County, Kansas, USA
October 20, 2015
Size: 2.7 mm

Taken in a pan trap.

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Contributed by Glenn A. Salsbury on 20 October, 2015 - 10:52am
Last updated 21 June, 2016 - 2:42pm

Moved

Moved from Rhizophagus.

… v belov, 21 June, 2016 - 2:42pm

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Moved

Moved from ID Request.

… Will Chatfield-Taylor, 5 December, 2015 - 5:30pm

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Guess: Monotomidae

Something close to this one?

… Chris Hartley, 20 October, 2015 - 12:47pm

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Yes, Rhizophagus

You are right for Rhizophagus, however, it isn't R. sayi. This specimen is less elongated and have serrate pronotum at base. I don't have the Rhizophagus key with me right now, but this last characteristic should help to determine the exact species.

… Pierre-Marc Brousseau, 23 October, 2015 - 9:12pm

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species ID

Unfortunately I do not have a key to all of the species. But the specimen has the middle tibiae with 3 long spines and a large attenuate spine at the apex of tibiae 1. The two partial keys I was able to locate would indicate it is either sayi or bipunctatus. Are these the only two with the large spines on the middle tibiae?

… Glenn A. Salsbury, 25 October, 2015 - 7:05am

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It's Rhizophagus sayi

I don't know what you mean about a serrate pronotum. No Rhizophagus have a serrate pronotum as far as I know.

… Tommy McElrath, 10 March, 2016 - 8:42pm

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I think you got it

I think you are correct. My photo does not show the two light spots at the base of the elytra but they are there, just faint. I have been catching a lot of these lately in a white pan trap using soapy water and a baffle. Thank you for the ID.

… Glenn A. Salsbury, 20 October, 2015 - 1:03pm

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