Hostname: page-component-cc8bf7c57-hbs24 Total loading time: 0 Render date: 2024-12-11T23:08:14.397Z Has data issue: false hasContentIssue false
  • English
  • Français

A Wenlockian (Silurian) gastropod shell and operculum from Siberia

Published online by Cambridge University Press:  20 May 2016

Alexander P. Gubanov  and
Ellis L. Yochelson
Alexander P. Gubanov
Affiliation:
Institute of Geology, Siberian Section, Russian Academy of Sciences, Novosibirsk 630090, Russia
Ellis L. Yochelson
Affiliation:
Department of Paleobiology, National Museum of Natural History, Washington, D.C. 20560, and U.S. Geological Survey (retired)
Get access Rights & Permissions [Opens in a new window]

Abstract

In a large collection of Wenlockian gastropods from north Siberia, a single small specimen shows the operculum in situ just within the aperture. In other morphologic features, particularly the presence of numerous spiral lirae on the shell, this species is similar to Silurian gastropods traditionally assigned to Oriostoma. Preservation of the operculum is far from perfect, but almost certainly it has paucispiral growth, rather than concentric or multispiral construction. This new species (Australonema varvarae n. sp.) is assigned to Australonema, previously known only from the Lower Devonian of Australia, primarily because of the form of the operculum. The material was obtained from just below a biostromal unit in a bed interpreted as an interreef lagoon in an area of locally relatively quiet water.

Type
Research Article
Information
Journal of Paleontology , Volume 68 , Issue 3 , May 1994 , pp. 486 - 491
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

Gordon, M. Jr. and Yochelson, E. L. 1982. A Naticopsis operculum found in situ (Gastropoda, Mississippian). Journal of Paleontology, 56:260–265.Google Scholar
Gubanov, A. P. 1985. Changes of gastropods and their dependence on the hydrodynamics of the basin, p. 70–74. In Betekhtine, O. A. and Zhuravlova, I. T. (eds.), Environment and Life in the Geologic Past: Paleobasins and their Inhabitants. Transactions of the Geological and Geophysical Institute, Siberian Section, Academy of Sciences, Bulletin 628 [in Russian].Google Scholar
Hall, J. 1859. Contributions to the paleontology of New York; being some of the results of investigations during the years 1855, 1856, 1857, and 1858. Twelfth Annual Report of the State Cabinet of Natural History, p. 8–110.Google Scholar
Hickman, C. S., and McLean, J. H. 1990. Systematic revision and suprageneric classification of trochacean gastropods. Natural History Museum of Los Angeles County Science Series, 35, 169 p.Google Scholar
Knight, J. B. 1941. Paleozoic gastropod genotypes. Geological Society of America, Special Paper 32, 510 p.Google Scholar
Knight, J. B. 1956. New family of Gastropoda. Journal of the Washington Academy of Science, 46:41–42.Google Scholar
Lindstrom, G. 1884. On the Silurian Gastropoda and Pteropoda of Gotland. Kongliga Svenska Vetenskaps-Akademiens Handlinger, Bandet 19, No. 6, 250 p.Google Scholar
Rohr, D. M., and Boucot, A. J. 1985. Observations on the operculum of Oriostoma (Silurian Gastropoda). Canadian Journal of Earth Sciences, 22:294–296.Google Scholar
Tassell, C. B. 1976. A revision of the gastropod fauna of the Lilydale Limestone (Early Devonian) of Victoria. Memoirs of the National Museum of Victoria, 37:1–22.Google Scholar
Tassell, C. B. 1980. Further gastropods from the Early Devonian Lilydale Limestone, Victoria. Records of the Queen Victoria Museum, Lauceston, 69:3–27.Google Scholar
Teller, E. E. 1910. An operculated gastropod from the Niagara Formation of Wisconsin. Wisconsin Academy of Science, Arts, and Letters, Transactions, 16:1286–1288.Google Scholar
Wenz, W. 1938. Gastropoda. Allgemeiner und Prosobranchia, p. 1–240. In Schindewolf, O. H. (ed.), Handbuch der Paläozoologie, Band 6, Teil 1.Google Scholar
Yochelson, E. L. 1990. Billings' second operculum: a late Early Ordovician Maclurites (Gastropoda) from western Newfoundland and the Canadian Arctic. Canadian Journal of Earth Sciences, 27:669–676.Google Scholar
Yochelson, E. L. 1991. Pennsylvanian gastropod opercula from eastern and central United States. XI Congres International de Stratigraphie et de Geologie du Carbonifere, Beijing 1987, Compte Rendu, 2:399–405.Google Scholar
Yochelson, E. L., and Linsley, R. M. 1972. Opercula of two gastropods from the Lilydale Limestone (Early Devonian) of Victoria, Australia. Memoirs of the National Museum of Victoria, 33:1–13.Google Scholar