The genus Clavulinoides Cushman emended and the new Cretaceous genus Clavulinopsis
- 1 April 1985
- journal article
- research article
- Published by Cushman Foundation for Foraminiferal Research in Journal of Foraminiferal Research
- Vol. 15 (2) , 79-90
- https://doi.org/10.2113/gsjfr.15.2.79
Abstract
The type species and other Paleocene species of the genus Clavulinoides Cushman, 1936, have simple apertures and canaliculate walls and are distinct from both Clavulina d''Orbigny, 1826, of the Tertiary (with canaliculate walls, apertural tooth and toothplate) and CLAVULINOPSIS gen. nov. [type species C. hofkeri sp. nov.] of the Late Cretaceous (with canaliculate walls and a sieve-like aperture). All are distinct from the Cretaceous genus Tritaxia Reuss, 1860, with its simple aperture, internal toothplate and solid walls, and from the Cretaceous-Tertiary Pseudoclavulina (Cushman) with its solid walls and simple aperture. The significance of iterative, independent development of canalicular walls is discussed.This publication has 2 references indexed in Scilit:
- Suprageneric Classification of the Foraminiferida (Protozoa)Micropaleontology, 1984
- A monograph of the Forminifera of the North Pacific Ocean pt. 2: TextulariidaeBulletin of the United States National Museum, 1911