Veliger
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A veliger is the planktonic larva of many kinds of sea snails and freshwater snails, as well as most bivalve molluscs and tusk shells.
9 day old veliger of the nudibranch Tritonia diomedea with various organs and structures labeled. Larval size about 200 um on its long axis.
Veliger of sea hare Dolabrifera dolabrifera, with two rows of cilia visible
Zebra mussel
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The zebra mussel is a small freshwater mussel, an aquatic bivalve mollusc in the family Dreissenidae. The species originates from the lakes of southwestern Russia and southeastern Europe, but has been
Veliger
…Mollusca: Prosobranchia)". Journal of Zoology 182(4): 495-503. doi:10.1111/j.1469-7998.1977.tb04165.x. Information about the veliger of the Zebra Mussel Dreissena polymorpha…
Dreissena polymorpha 0265
Right valve
Left valve
Closeup of siphon