what is Ostracoda?

Ostracoda is small bivalved Crustacea, and is sensitive to various environmental factors.
It is useful metazoan group abundantly fossilized in sediments that allow quantitative faunal analysis in sediment cores.
Its common name is ostracode or ostracod.

Further information is found in:

International Research Group on Ostracoda (IRGO)

CYPRIS: International Ostracoda Newsletter