Shell design inBolivinita quadrilatera, B. pohana, andB. compressa(Foraminiferida)
- 1 January 1978
- journal article
- research article
- Published by Taylor & Francis in New Zealand Journal of Geology and Geophysics
- Vol. 21 (1), 85-95
- https://doi.org/10.1080/00288306.1978.10420725
Abstract
Aspects of the morphology of 3 related Neogene species of Bolivinita are described and some features are related to the structural design of the shells. Possible hydromechanical consequences of the architectural differences between B. quadrilatera (rectangular spiral profile) and B. compressa (flattened, alate, spiral profile) are inferred but, qualitatively, no outstanding advantages of the descendant alate form (B. compressa) are apparent. Both taxa occupied deep water biotopes. Biometric data on spiral shape of the species (topotypic or near topotypic material) does not support previous views that B. pobana was the immediate ancestor of B. compressa. Toothplate construction in the group involves partial closure of the antecedent aperture. The location and shape of the tooth plate indicate that it would impede rather than Iaci litate the passage of cytoplasm.This publication has 2 references indexed in Scilit:
- Fourier analysis of bivalve outlines: Implications on evolution and autecologyMathematical Geology, 1976
- Variation inGloborotalia miozea(Foraminiferida) from the New Zealand neogeneNew Zealand Journal of Geology and Geophysics, 1975