I recently took a few macro images of some amphipods and found other critters were in the frame. I wasn't sure what they were, and Melev at RC identified them as Ostracodes. To the naked eye they are smaller than a grain of sand.
" Ostracodes are very small animals which are common as fossils but are rarely large enough to be seen by the naked eye. They have been present on earth since the early part of the
Ordovician Period (490 to 443 years ago), and occur today in great numbers in lakes, rivers, and seas. Ostracodes prefer shallow water and live in vast hordes, crawling over the bottom or swimming near the surface.
They have two shells, one on each side of the body, so that some ostracodes look much like small clams. But the animal inside looks much like a shrimp or an insect with jointed legs and feelers. As the animal grows, it sheds its shells and forms a new pair. The shells may be smooth, or ornamented with pits, bumps, ribs, or spines."
http://www.isgs.uiuc.edu/fossils/ostracodes.htm
NIkon D200, nikkor 60mm micro
Regards
RFC
" Ostracodes are very small animals which are common as fossils but are rarely large enough to be seen by the naked eye. They have been present on earth since the early part of the
Ordovician Period (490 to 443 years ago), and occur today in great numbers in lakes, rivers, and seas. Ostracodes prefer shallow water and live in vast hordes, crawling over the bottom or swimming near the surface.
They have two shells, one on each side of the body, so that some ostracodes look much like small clams. But the animal inside looks much like a shrimp or an insect with jointed legs and feelers. As the animal grows, it sheds its shells and forms a new pair. The shells may be smooth, or ornamented with pits, bumps, ribs, or spines."
http://www.isgs.uiuc.edu/fossils/ostracodes.htm
NIkon D200, nikkor 60mm micro
Regards
RFC
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