US Geological Survey
Date of this Version
Descriptions and illustrations are given for 44 ostracode species of the Decker, Rondout and Manlius limestones of the William Nearpass quarries and Dalton Nearpass farm in northwestern New Jersey, and at Austin's Glen and Trilobite Mountain in New York. One brachiopod variety is proposed. The ostracode species are distributed through 11 families and 23 genera. Thirty-two species and one variety are new, and there are eight new genera. Holotype or syntype specimens of 13 of Weller's ostracode species have been restudied and are refigured and redescribed. Stratigraphic sections are described to provide details of the ostracode occurrences, and zonal potentialities are considered. There is an extensive and distinctive suite of ostracode species in the uppermost part of the Decker limestone, and at least one well characterized species occurs in middle beds. Species of Leperditia are common in the Rondout limestone, where other observed ostracodes include only some unidentified specimens of Kloedenella and more questionably of Eukloedenella. Ostracodes are numerous and diversified in the Manlius limestone, and include several distinctive species that range throughout the formation, whereas others are restricted to lower, upper, and possibly middle beds. Successive changes of the ostracode assemblages and other faunal groups in part are evolutionary, but in part reflect modifications in environment that affected the animal communities as a whole.
Published in the JOURNAL OF PALEONTOLOGY VOLUME 30, NUMBER 5, SEPTEMBER, 1956.