Hex Mayflies
Hexagenia limbata
The famous nocturnal Hex hatch of the Midwest (and a few other lucky locations) stirs to the surface mythically large brown trout that only touch streamers for the rest of the year.
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This one seems to tentatively key to Holocentropus, although I can't make out the anal spines in Couplet 7 of the Key to Genera of Polycentropodidae Larvae nor the dark bands in Couplet 4 of the Key to Genera of Polycentropodidae Larvae, making me wonder if I went wrong somewhere in keying it out. I don't see where that could have happened, though. It might also be that it's a very immature larva and doesn't possess all the identifying characteristics in the key yet. If Holocentropus is correct, then Holocentropus flavus and Holocentropus interruptus are the two likely possibilities based on range, but I was not able to find a description of their larvae.
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Okeydokey01
Posts: 2
Posts: 2
Okeydokey01 on Apr 29, 2008April 29th, 2008, 1:34 am EDT
what do the water pennies eat?
Taxon on Apr 29, 2008April 29th, 2008, 12:47 pm EDT
OD-
Water penny beetle larvae feed on periphyton, a complex mixture of algae, cyanobacteria, heterotrophic microbes, and detritus coating the rocks to which they attach themselves. The adults are not aquatic.
Water penny beetle larvae feed on periphyton, a complex mixture of algae, cyanobacteria, heterotrophic microbes, and detritus coating the rocks to which they attach themselves. The adults are not aquatic.