Info on super teeny species of FW clam?

knifegill

AC Members
Jan 13, 2005
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I found these little clams on a bug hunt at a retention pond near my house. These little buggers look like bits of quartz gravel and if I hadn't been trolling the mud for bugs, I'd never have noticed them at all. The biggest ones aren't even 1/8th of an inch wide. They seem to be almost perfectly symmetrical. The shell surface is smooth, glassy and gives a high shine, again much like quartz gravel. Any guesses on which species this might be?
 
Pics would indeed help, as would a location. One guess could be the family of clams (scientific name escapes me at the moment) that are often referred to as "fingernail clams" and "pea clams".
 
Sphaerid clams are small and white. They're the "fingernail" or "pea" clams Vampie mentioned.
 
Oh! Thanks! Do any of these Sphaerid clams have a parasitic reproductive phase? Info I find on google is unclear. I'll try to get a pic but it won't be very good...
 
Fail. I put the clams in my 5g invert tank. They are hidden somewhere in three fistfulls of nasty technicolor gravel and I dug but found none.
 
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