Class Ostracoda - Information on these small shrimps which form part of the marine plankton and are frequently found as fossils, with photographs of a number of these from the Gault Clay, UK.
International Research Group on Ostracoda (IRGO) - An interdisciplinary, international organization of research scientists studying living and fossil Ostracoda. Its purpose is to advance our knowledge of Ostracoda and to facilitate communication among researchers.
Leperditia - Photograph of this ostracod from the Silurian, found in West Virginia.
Leperditia sp - Photograph of some fossils of this genus found in Medina Sandstone, New York, and dating back to the Lower Silurian.
