The Ostracod Genus Dicrorygma POAG 1962 from Upper Jurassic and Lower Cretaceous

Authors

  • Ole Bruun Christensen

DOI:

https://doi.org/10.34194/raekke2.v90.6881

Abstract

Representatives of the subgenus Dicrorygma Poag are found in Lower Cretaceous beds in Texas, England, and Denmark.

Two new Lower Cretaceous species have been described from England and Denmark, respectively. Besides, an ostracod closely related to the English species has been described from Danish beds.

Species of Dicrorygma (Orthorygma) nov. subgen. occur in beds of the Kimmeridgian, Portlandian, and Purbeckian Ages from Denmark. Frequent occurrences of the species in the Purbeckian beds indicate marine ingressions in these otherwise brackish deposits. A number of formerly described Upper Jurassic species from NW. Europe are considered to belong to the genus Dicrorygma. Three new Upper Jurassic species are described.

Cover image for volume 90

Downloads

Published

1965-12-31

How to Cite

Christensen, O. B. (1965). The Ostracod Genus Dicrorygma POAG 1962 from Upper Jurassic and Lower Cretaceous. Danmarks Geologiske Undersøgelse II. Række, 90, 1–22. https://doi.org/10.34194/raekke2.v90.6881

Issue

Vol. 90 (1965): The Ostracod Genus Dicrorygma POAG 1962 from Upper Jurassic and Lower Cretaceous

Section

Monograph

License

This article is distributed under a CC-BY 4.0 licence, permitting free redistribution and reproduction for any purpose, even commercial, provided proper citation of the original work. Author(s) retain copyright over the article contents.