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Ocular shell structures in some Cretaceous trachyleberid Ostracoda

Micropaleontology

By:
and

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Abstract

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.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Ocular shell structures in some Cretaceous trachyleberid Ostracoda
Series title:
Micropaleontology
Volume
44
Issue:
2
Year Published:
1998
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Micropaleontology
First page:
201
Last page:
206
Number of Pages:
6