This is the first study of internal ocular shell structures of Cretaceous ostracodes. Internal molds from eight species of four genera from Santonian, Campanian, and Maastrichtian strata revealed a stalked ocular sinus constricted along its length and distally inflated. The latter part has anterior and posterior lobes and a subcentral concavity. These Cretaceous trachyleberids have ocular shell structures similar to Cenozoic taxa and it is presumed they functioned similarly. However, each taxon has a diagnostic ocular sinus and an inner surface of the eye tubercle that distinguishes each from all other forms examined.
|Title||Ocular shell structures in some Cretaceous trachyleberid Ostracoda|
|Authors||M. Kontrovitz, T.M. Puckett|
|Publication Subtype||Journal Article|
|Record Source||USGS Publications Warehouse|