Lake Gosiute, Green River eocene, unknown larva, worms and bugs
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I don't see any gills in the fossils, they all look to be air breathers. I
would guess diptera (flies), such as mosquito larvae, or similar. There
are a few that seem to be attached at the head and abdomen, I have seen
this in diptera larvae.
It looks to be an assemblage from a vernal pool or a mud flat, where low
oxygen conditions preclude mosquito larvae predators, such as the nymphs
of the following, all which have gills, damsel fly, dragon fly, stone fly,
etc., these are considered indicators of "high quality" water. Any worms
you see may actually be nematodes, similar to horse hair worms, also
indicators of low oxygen conditions.
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