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Late Ordovician channel-dwelling crinoids from southern Ontario, Canada. American Museum novitates ; no. 2665

Show simple item record Haugh, Bruce N. en_US 2005-10-06T18:19:20Z 2005-10-06T18:19:20Z 1979 en_US
dc.description 25 p. : ill. ; 26 cm. en_US
dc.description Includes bibliographical references (p. 24-25). en_US
dc.description.abstract "Rheocrinus aduncus, new genus, and new species, subclass Camerata, and Parisocrinus mulletensis, new species, subclass Inadunata, occurr in a late Ordovician (Richmondian) submarine channel fill in the Georgian Bay Formation. This occurrence greatly extends the stratigraphic ranges of the respective families, Anthacocrinidae and Ampheristocrinidae, thereby providing morphologic and temporal support to proposed evolutionary relationships of the foregoing families with the Rhodocrinitidae and Cyathocrinitidae, respectively. Unusual morphological features of R. aduncus indicate that it could form an inclined, parabolic filtration baffle, as do certain living stalked crinoids. A vertically held, planar baffle is suggested for P. mulletensis. These species are believed to have occupied two distinctive microhabitats defined by feeding level, current energy, and feeding mode. They are presently the oldest known channel-dwelling crinoids, and contain among the oldest three dimensional preserved internal organs"--P. [1]. en_US
dc.format.extent 15844890 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. 2665 en_US
dc.subject.lcc QL1 .A436 no.2665, 1979 en_US
dc.subject.lcsh Rheocrinus aduncus. en_US
dc.subject.lcsh Parisocrinus mulletensis. en_US
dc.subject.lcsh Crinoidea, Fossil -- Ontario. en_US
dc.subject.lcsh Echinodermata, Fossil -- Ontario. en_US
dc.subject.lcsh Paleontology -- Ordovician -- Ontario. en_US
dc.subject.lcsh Paleontology -- Ontario. en_US
dc.title Late Ordovician channel-dwelling crinoids from southern Ontario, Canada. American Museum novitates ; no. 2665 en_US
dc.title.alternative Channel-dwelling crinoids 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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