Morphology and taxonomic position of the Late Cretaceous diatom genus Pomphodiscus Barker & Meakin

Authors

Vladimir A. Nikolaev, Academy of Sciences of Russia
David M. Harwood, University of Nebraska-LincolnFollow

Date of this Version

2000

Comments

Published in micropaleontology, vol. 46, no. 2, pp. 167-177, table 1, plates 1-4, 2000

Abstract

Results from our investigation of Upper Cretaceous diatoms from the Marca Shale Member of the Moreno Shale in California and from Ocean Drilling Program (ODP) Hole 748C on the Kerguelen Plateau ,Southern Indian Ocean enable a clarification of the taxonomic position of several diatoms. Differences in areola structure ,a primary and conservative character of the diatom valve, are used to separate diatoms recently included in the genus Benetorus. We resurrect he genus Pomphodiscusto include species with locular areolae, a central rimoportula ,and a central inflated chamber .We propose the new species Pomphodiscusk erguelensisn. sp. and new combination Pomphodiscusc raspedodiscoides comb. nov.