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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Elateriformia » Byrrhoidea » Riffle Beetles (Elmidae) » Elminae » Elmini » Optioservus » Optioservus ovalis
Photo#965039
Optioservus quadrimaculatus? - Optioservus ovalis
Copyright © 2014 roar

Optioservus quadrimaculatus? - Optioservus ovalis
Lancaster County, Pennsylvania, USA
July 25, 2014
Size: 2mm
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Contributed by roar on 26 July, 2014 - 12:18pm
Last updated 13 July, 2020 - 2:20am

Moved
Moved from Optioservus.
… v belov, 13 July, 2020 - 2:20am login or register to post comments

Optioservus ID
I don't think O. quadrimaculatus occurs in eastern states. This looks like O. ovalis.
… Yaal D, 16 October, 2018 - 8:00pm login or register to post comments

 
Species key
Take a look at the key in "A revision of the nearctic Optioservus (Coleoptera: Elmidae), with descriptions of new species." To be certain, check genitalia if male, but I'm pretty sure it is O. ovalis.
… Yaal D, 16 October, 2018 - 8:08pm login or register to post comments

body shape suggests otherwise; hope someone figures it out
see comments at(1); your bug looks ~conspecific to Tom's
nice find, and great pic as always

Moved from Beetles.
… v belov, 26 July, 2014 - 1:02pm login or register to post comments

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