Ostracods are small crustacea including both fossil and extant forms. The typical ostracod is 1-3 mm in length, though smaller and larger forms are known. As fossils, they are most notable for their calcareous carapace, which is composed of paired valves. Both the paired valves and single valves can be recovered. While the valves may be quite simple in some species, in others they may be elaborately decorated. The following ostracods were recovered from weathered samples of the Darian Submember of the Wanakah Shale (Ludlowville Formation, Hamilton Group, Middle Devonian) at Bethany, NY. The weathered material was washed seived, and the ostracods retrieved using a stereomicroscope. All are 2 mm or less in length.
Ponderodictya punctulifera (Hall)
Hibbordia lacrimosa (Swartz &
Welleria bisulcata Smith
Phlyctiscapha subovata Smith ?
Poloneilla sp. ?
Smith, M.L. (1956) Some Ostracods from the Middle Devonian Ledyard and Wanakah Members of the Ludlowville Formation in Western New York. J. of Paleontology 30 (1) 1-8.
Page last revised 17 May, 2000