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

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dc.contributor.authorHaugh, Bruce N.en_US
dc.date.accessioned2005-10-06T18:19:20Z
dc.date.available2005-10-06T18:19:20Z
dc.date.issued1979en_US
dc.description25 p. : ill. ; 26 cm.en_US
dc.descriptionIncludes 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.extent15844890 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/5416
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, N.Y. : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates ; no. 2665en_US
dc.subject.lccQL1 .A436 no.2665, 1979en_US
dc.subject.lcshRheocrinus aduncus.en_US
dc.subject.lcshParisocrinus mulletensis.en_US
dc.subject.lcshCrinoidea, Fossil -- Ontario.en_US
dc.subject.lcshEchinodermata, Fossil -- Ontario.en_US
dc.subject.lcshPaleontology -- Ordovician -- Ontario.en_US
dc.subject.lcshPaleontology -- Ontario.en_US
dc.titleLate Ordovician channel-dwelling crinoids from southern Ontario, Canada. American Museum novitates ; no. 2665en_US
dc.title.alternativeChannel-dwelling crinoidsen_US
dc.typetexten_US

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