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Home » Guide » Arthropods (Arthropoda) » Hexapods (Hexapoda) » Insects (Insecta) » Beetles (Coleoptera) » Polyphaga » Series Elateriformia » Byrrhoidea » Riffle Beetles (Elmidae) » Elminae » Elmini » Optioservus
Photo#251080
Riffle Beetle Larva - Optioservus
Copyright © 2009 Stephen Luk

Riffle Beetle Larva - Optioservus
Eramosa River, Guelph, Wellington, Ontario, Canada
January 13, 2009
Size: 5.0 mm
Here's an Elmid larva for the guide. Sifted from detritus, in association with adults of this species. The flattened, armor-plated body, and terminal gill chamber are characteristic (shared with the Lutrochidae, which have rounder abdominal tip and are rarer),
Contributed by Stephen Luk on 29 January, 2009 - 9:37am
Last updated 1 July, 2013 - 1:22pm

Moved
Moved from Stenelmis crenata.

It's difficult to make out in this view, but the cross section is triangular, not hemicylindrical as in Stenelmis. See here for an example of Stenelmis larva.
… Brady Richards, 1 July, 2013 - 1:22pm

Excellent!
Love to see those larval associations :-)
… Jim McClarin, 30 January, 2009 - 8:23pm

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