Morphology, Onotgeny, and Intraspecific Variation of Sinacopia, a New Genus of Myodocopid Ostracod (Sarsiellidae). Smithsonian Contributions to Zoology, Number 8

摘要

Morphology, biology, and variability of a new genus with four new species are described from collections of deep-sea ostracods obtained by the Lamont Greological Observatory and Woods Hole Biological Laboratory in the Atlantic, Antarctic, and Indian Oceans. Adult females far out number males in collections, but juvenile males and females are present in equal numbers indicating that adult males are short lived. Microtome sections of male and female genitalia document that the male transfers sperm to the female in ovoid spermatophores which are attached externally. Examination of stomachs shows that members of the new genus are carnivores feeding oncopepods, ostracods, and nematodes. Apparently adult males do not eat. A key is presented for identification of early in star stages by means of examination of sixth and seventh limbs.