Hostname: page-component-cd9895bd7-q99xh Total loading time: 0 Render date: 2024-12-26T07:44:53.703Z Has data issue: false hasContentIssue false
  • English
  • Français

A new heteromorph ammonite from the Barremian (Cretaceous) of California

Published online by Cambridge University Press:  14 July 2015

Michael A. Murphy ,
Peter U. Rodda  and
Patrick Embree
Michael A. Murphy
Affiliation:
University of California, Davis 95616, California Academy of Sciences, San Francisco 94118
Peter U. Rodda
Affiliation:
University of California, Davis 95616, California Academy of Sciences, San Francisco 94118
Patrick Embree
Affiliation:
2228 Knobcone, Anderson, California 96007
Get access Rights & Permissions [Opens in a new window]

Extract

The fauna of the lower Chickabally Member of the Budden Canyon Formation, a part of the Cretaceous Great Valley Sequence in the Cottonwood District (Figures 1, 2) of northern California, was described by Murphy (1975). At that time, two specimens of the species described here were known, but they were not complete enough to be identified or classified. Recently, Embree collected three additional specimens from the same horizon that enable us to classify the taxon with the Heteroceratidae. However, the rate of whorl expansion of the cross section of the conch and the open coiling are different from all other Heteroceratidae and we regard it, like much of the associated fauna, as a genus and species endemic to California.

Type
Paleontological Notes
Information
Journal of Paleontology , Volume 69 , Issue 6 , November 1995 , pp. 1179 - 1182
Copyright
Copyright © The Paleontological Society 

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Bralower, T. J. 1990a. Lower Cretaceous calcareous nannofossil stratigraphy of the Great Valley Sequence, Sacramento Valley, California. Cretaceous Research, 11:101–123.Google Scholar
Bralower, T. J. 1990b. A field guide to Lower Cretaceous calcareous nannofossil biostratigraphy of the Great Valley Group, Sacramento Valley, California. In Ingersoll, R. V. and Nilsen, T. H. (eds.), 1990, Sacramento Valley Symposium and Guidebook, Pacific Section S.E.P.M. Guidebook, 65:31–37.Google Scholar
Busnardo, R. 1963. Rapport sûr l'étage Barrémian. Colloque sûr le Crétacé inférieur. Bureau Récherches géologiques et minières Mémoir, 34:161–169.Google Scholar
Djanelidzé, A. 1926. Mélanges géologiques et paléontologiques. Bulletin Tiflis University, 6:259–266.Google Scholar
Hyatt, A. 1900. in Textbook of Paleontology by Zittel. Translated and edited by Charles Eastman, First Edition. New York and London, MacMillan and Co., Ltd. Google Scholar
Kakabadze, M. V. 1975. The Heteroceratinae of Georgia and adjacent regions (In Russian). Trudy Geological Institute Akademia Nauk G.S.S. R. NS, 47:62–131.Google Scholar
Murphy, M. A. 1975. Paleontology and stratigraphy of the Lower Chickabally Mudstone (Barremian–lower Aptian) in the Ono Quadrangle, northern California. University of California Publications in Geological Sciences, 113:1–52.Google Scholar
Murphy, M. A., Rodda, P. U., and Morton, D. M. 1969. Geology of the Ono Quadrangle, Shasta and Tehama Counties, California. California Division of Mines and Geology Bulletin, 192:1–28.Google Scholar
Orbigny, A. D'. 1850. Prodrôme de Paléontologie. Stratigraphique universelle des animaux mollusques et rayonnés 2, Paris.CrossRefGoogle Scholar
Rouchadzé, J. 1933. Les ammonites aptiennes de la Georgie occidentale. Bulletin Institute géologique Georgie, 1(3):166–273.Google Scholar
Urreta, M. B. A., and Klinger, H. C. 1986. Upper Barremian Heteroceratinae (Cephalopoda, Ammonoidea) from Patagonia and Zululand, with comments on the systematics of the subfamily. Annals South African Museum, 96(8):315–358.Google Scholar