geisinid

plural geisinids

1. A bivalve mollusk of the family Geisinidae.

   The difference between the kloedenellids and the geisinids, as defined, is the development of an anterodorsal process in the former.

   1978, Robert Vernon Kesling, Ruth B. Chilman, Ostracods of the Middle Devonian Silica Formation

   2 more examples

   Geisinids, and other groups having an IPl and usually assigned to the Kloedenellids deserve to be set apart as the independent suborder Parapodocopa.

   1977, Doklady: Earth science sections - Volumes 232-234, page 211

   Preliminary examination of interbedded dark shales reveals abundant geisinid ostracodes and plant material, interpreted to represent restricted, low energy, nearshore deposition.

   1994, Raymond A. Garber, David R. Keller, Field Guide to the Paleozoic Section of the San Andres Mountains