The ultrastructure of five common Pennsylvanian pleurotomarian gastropod species of eastern United States. American Museum novitates ; no. 2501

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dc.contributor.author Batten, Roger Lyman. en_US
dc.date.accessioned 2005-10-06T16:35:07Z
dc.date.available 2005-10-06T16:35:07Z
dc.date.issued 1972 en_US
dc.identifier.uri http://hdl.handle.net/2246/2708
dc.description 34 p. : ill. ; 24 cm. en_US
dc.description Includes bibliographical references (p. 33-34). en_US
dc.description.abstract "The shell ultrastructure of five pleurotomarian gastropod species from the Pennsylvanian is described and and variation discussed; in addition, some observations are made of three bellerophontid species. Two thin outer shell layers previously unknown are analyzed. The outermost of these is fibrous and about 10 [microns] thick; it appears to be the only one that is actually involved in the topographic expression of growth. The two principal layers of the species studied are an outer complex prismatic layer and a thicker inner nacreous layer. There is an innermost complex prismatic unit which is variable in development and may be absent in some species. Several types of pallial myostracum are present in all species examined. The importance of shell structure in elucidating the origin and phylogeny of molluscan groups is briefly discussed. Most variation of ultrastructure appears to occur within or between species and is quite conservative between larger taxonomic units"--P. [1]. en_US
dc.format.extent 12275447 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, N.Y. : American Museum of Natural History en_US
dc.relation.ispartofseries American Museum novitates ; no. 2501 en_US
dc.subject.lcc QL1 .A436 no.2501, 1972 en_US
dc.subject.lcsh Turridae, Fossil -- East (U.S.) en_US
dc.subject.lcsh Ultrastructure (Biology) en_US
dc.subject.lcsh Snails -- Anatomy. en_US
dc.subject.lcsh Body covering (Anatomy) -- Ultrastructure. en_US
dc.subject.lcsh Mollusks, Fossil -- East (U.S.) en_US
dc.subject.lcsh Paleontology -- Pennsylvanian -- East (U.S.) en_US
dc.subject.lcsh Paleontology -- East (U.S.) en_US
dc.title The ultrastructure of five common Pennsylvanian pleurotomarian gastropod species of eastern United States. American Museum novitates ; no. 2501 en_US
dc.title.alternative Pleurotomarian gastropods en_US
dc.type text en_US

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  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

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