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New early Eocene marine gastropods from Baja California Sur, Mexico

Published online by Cambridge University Press:  20 May 2016

Richard L. Squires  and
Robert Demetrion
Richard L. Squires
Affiliation:
Department of Geological Sciences, California State University, Northridge 91330
Robert Demetrion
Affiliation:
Department of Geological Sciences, University of Southern California, Los Angeles 90007
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Abstract

Three gastropod species are described from a previously unknown shallow-marine molluscan fauna in the lower Eocene Bateque Formation, southwest of San Ignacio, Baja California Sur, Mexico. Velates batequensis n. sp., a commonly occurring neritid in the Bateque, is the only ribbed Velates known from the Western Hemisphere. The fairly rare Platyoptera pacifica n. sp. is the earliest record of this strombid genus and its first occurrence on the west coast of North America. The very rare Cypraedia sp. is also the first occurrence of this cypraeid-like genus on the west coast of North America.

Type
Research Article
Information
Journal of Paleontology , Volume 64 , Issue 1 , January 1990 , pp. 99 - 103
Copyright
Copyright © The Paleontological Society 

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References

Adams, H., and Adams, A. 1854. The Genera of Recent Mollusca; Arranged According to Their Organization. Vol. 1. John Van Voorst, London, 484 p.Google Scholar
Archiac De Saint-Simon, E. J. d', A., and Haime, J. 1853–1854. Description des animaux fossiles du groupe nummulitique de l'Inde. 2 vols. Paris, 373 p.Google Scholar
Berggren, W. A., Kent, D. V., Flynn, J. J., and Van Couvering, J. A. 1985. Cenozoic geochronology. Geological Society of America Bulletin, 96:1407–1418.2.0.CO;2>CrossRefGoogle Scholar
Bezançon, A. 1870. Descriptions d'especes nouvelles du bassin de Paris. Journal de Conchyliologie, 18:310–323.Google Scholar
Conrad, T. A. 1854. Fossil Testacea of the Tertiary green-sand and marl-bed of Jackson, Miss., p. 359. In Wailes, B. L. C. (ed.), Report on the Agriculture and Geology of Mississippi…, Jackson, Miss. Reprinted, 1939, in Bulletins of American Paleontology 24(86):10–19.Google Scholar
Cossmann, A. E. M. 1888. Catalogue illustré des coquilles fossiles de l'Éocène des environs de Paris. Société Royale Malacologique de Belgique, 23:1–324.Google Scholar
Cossmann, A. E. M. 1904. Essais de paléoconchologie comparée. Vol. 6. Privately published, Paris, 148 p.Google Scholar
Cossmann, A. E. M. 1913. Catalogue illustré de coquilles fossiles de l'Éocène des environs de Paris. Société Royale Malacologique de Belgique, 49: Appendix 5.Google Scholar
Cossmann, A. E. M., and Pissarro, G. 1909. The Mollusca of the Ranikot Series. Pt. 1. Cephalopoda and Gastropoda. Memoirs of the Geological Survey of India, Palaeontologia Indica, new series, Memoir 1, Vol. 3, 83 p.Google Scholar
Cossmann, A. E. M. 1910–1913. Iconographie completé des coquilles fossiles de l'Eocène des environs de Paris. Société Géologique de France 2:pls. 1–65.Google Scholar
Cox, L. R. 1931. A contribution to the molluscan fauna of the Laki and basal Khirthar Groups of the Indian Eocene. Transactions of the Royal Society of Edinburgh, 57(2):25–92.CrossRefGoogle Scholar
Davies, A. M. 1971. Tertiary Faunas—A Text-book for Oilfield Palaeontologists and Students of Geology. Vol. 1. The Composition of Tertiary Faunas. Revised and updated by F. E. Eames. George Allen and Unwin, London, 571 p.Google Scholar
Davies, A. M. 1975. Tertiary Faunas—A Text-book for Oilfield Palaeontologists and Students of Geology. Vol. 2. The Sequence of Tertiary Faunas. Revised and updated by Eames, F. E. and Savage, R. J. G. George Allen and Unwin, London, 447 p.Google Scholar
Dockery, D. T. 1977. Mollusca of the Moodys Branch Formation, Mississippi. Mississippi Geological Economic and Topographical Survey Bulletin, 120:1–212.Google Scholar
Dockery, D. T. 1986. Punctuated succession of Paleogene mollusks in the northern Gulf Coast plain. Palaios, 1:582–589.Google Scholar
Doncieux, Louis. 1908. Catalogue descriptif des fossiles nummulitiques de l'Aude et de l'Hérault, Deuxième partie (fascicule 1), Corbières Septentrionales. Annales de l'Université de Lyon, nouvelle série 1, Sciences, Medecine, fascicule 22, 250 p.Google Scholar
Gabb, W. M. 1868. An attempt at a revision of the two families Strombidae and Aporrhaidae. American Journal of Conchology, 4:137–149.Google Scholar
Gmelin, J. F. 1791. Caroli a Linné Systema Naturae per regna tria naturae. Editio decima tertia. Vol. 1, Pt. 6 (Vermes):3021–3910. Lipsiae.Google Scholar
Harris, G. D., and Palmer, K. V. W. 1946–1947. The Mollusca of the Jackson Eocene of the Mississippi embayment (Sabine River to Alabama River). Bulletins of American Paleontology, 30(117):1–563.Google Scholar
Lamarck, J. B. de. 1804. Mémoires sur les fossiles des environs de Paris. Annales de Muséum National d'Histoire Naturelle, 5:91–98.Google Scholar
Mclean, H., Hausback, B. P., and Knapp, J. H. 1985. Reconnaissance geologic map of part of the San Isidro quadrangle, Baja California Sur, Mexico. U.S. Geological Survey, Miscellaneous Field Studies Map MF-1799.Google Scholar
Montfort, P. D. 1810. Conchyliologie systematique et classification méthodique des coquilles. Vol. 2. F. Schoell, Paris, 176 p.Google Scholar
Oppenheim, P. 1896–1897. Die Eocaenfaune der Monte Postale bei Bolca im Veronesischen. Palaeontographica, 43:125–222.Google Scholar
Plaziat, J.-C. 1984. Le genre Velates et sa signification biostratigraphique, un example représentatif de l'évolution des conceptions paléontologiques du 18 e siecle a nos jours, Vol. 1, p. 242–271. In Le Domaine Pyreneen de la fin du Crétacé à la fin de l'Éocène. Thése, Université Paris-Sud.Google Scholar
Quadri, V.-U.-N., and Shuaib, S. M. 1986. Hydrocarbon prospects of southern Indus basin, Pakistan. American Association of Petroleum Geologists Bulletin, 70:730–747.Google Scholar
Rafinesque, C. S. 1815. Analyse de la nature, ou tableau de l'universe et des corps organisées. Palermo, 224 p.Google Scholar
Raincourt, M. de. 1876. Description de quelques fossiles nouveaux du Bassin de Paris. Bulletin Société Géologique de France, série 3, 4:352–355.Google Scholar
Schilder, F. A. 1932. Cypraeacea. Fossilium Catalogus I, 55:1–276.Google Scholar
Schilder, M., and Schilder, F. A. 1971. A catalogue of living and fossil cowries. Taxonomy and bibliography of Triviacea and Cypraeaecea (Gastropoda Prosobranchia). Mémoires de l'Institut Royal des Sciences Naturelles de Belgique, série 2, 85, 246 p.Google Scholar
Squires, R. L. 1987. Eocene molluscan paleontology of the Whitaker Peak area, Los Angeles and Ventura Counties, California. Los Angeles County Natural History Museum Contributions in Science, 388, 93 p.Google Scholar
Squires, R. L., and Demetrion, R. 1989. An early Eocene pharetronid sponge from the Bateque Formation, Baja California Sur, Mexico. Journal of Paleontology, 63:440–442.CrossRefGoogle Scholar
Stainforth, R. M., Lamb, J. L., Luterbacher, H., Beard, J. H., and Jeffords, R. M. 1975. Cenozoic planktonic foraminiferal zonation and characteristic index forms. University of Kansas Paleontological Contributions, Article 62, 425 p.Google Scholar
Swainson, W. 1840. A Treatise on Malacology; or the Natural Classification of Shells and Shell-fish. Longman and others, London, 419 p.Google Scholar
Thiele, J. 1925. Gastropoden der deutschen Tiefsee-Expedition. II. Wissenschaftliche Evgebnisse der Deutschen Tiefsee-Expedition “Valdivia,” 17:35–382.Google Scholar
Vokes, H. E. 1935. The genus Velates in the Eocene of California. University of California Publications, Department of Geological Sciences Bulletin, 23:381–390.Google Scholar
Wenz, W. 1938–1941. Gastropoda. Allgemeiner Teil und Prosobranchia, p. 1–1639. In Schindewolf, O. H. (ed.), Handbuch der Paläozoologie. Gebrüder Borntraeger, Berlin.Google Scholar
Woods, A. J., and Saul, L. R. 1986. New Neritidae from southwestern North America. Journal of Paleontology, 60:636–655.CrossRefGoogle Scholar