Systematics of Lower and Lower Middle Devonian species of the trilobite Phacops Emmrich in North America. Bulletin of the AMNH ; v. 151, article 4

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dc.contributor.authorEldredge, Niles.en_US
dc.date.accessioned2005-10-06T14:23:54Z
dc.date.available2005-10-06T14:23:54Z
dc.date.issued1973en_US
dc.descriptionp. 287-337 : ill. ; 27 cm.en_US
dc.descriptionIncludes bibliographical references (p. 336-337).en_US
dc.description.abstract"Six species (one new) including 20 subspecies (4 new) of Phacops are recognized from the Lower and Middle Devonian of North America. Gedinnian-Siegenian species include P. logani Hall, 1861, and P. claviger Haas, 1969. Phacops clarksoni, new species, occurs in the Emsian Schoharie Formation of New York, and P. cristata Hall, 1861, occurs in the Emsian and Eifelian of the Appalachian Province. Phacops iowensis Delo, 1935, and P. rana (Green, 1832) occur in Givetian strata. A conservative position is taken on generic nomenclature and defended herein; all species, with the exception of P. rana are closely related and belong to the same monophyletic taxon. Special topics include a quantitative analysis of eye polymorphism and ontogeny in Phacops logani birdsongensis Delo, 1940, and P. logani raymondi (Delo, 1935), and of eye ontogeny in Phacops cristata stummi, new subspecies and P. c. canadensis (Stumm, 1954). Cladistic methodology in paleontology is briefly discussed, and theories of relationship among all subspecies and species are presented. A key to all Devonian phacopid taxa considered valid herein is included"--P. 289.en_US
dc.format.extent21749429 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/599
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York : [American Museum of Natural History]en_US
dc.relation.ispartofseriesBulletin of the American Museum of Natural History ; v. 151, article 4en_US
dc.subject.lcshPhacops.en_US
dc.subject.lcshTrilobites -- United States.en_US
dc.subject.lcshTrilobites -- Canada.en_US
dc.subject.lcshArthropoda, Fossil -- United States.en_US
dc.subject.lcshArthropoda, Fossil -- Canada.en_US
dc.subject.lcshPaleontology -- Devonian -- United States.en_US
dc.subject.lcshPaleontology -- Devonian -- Canada.en_US
dc.subject.lcshPaleontology -- United States.en_US
dc.subject.lcshPaleontology -- Canada.en_US
dc.titleSystematics of Lower and Lower Middle Devonian species of the trilobite Phacops Emmrich in North America. Bulletin of the AMNH ; v. 151, article 4en_US
dc.typetexten_US

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Bulletin of the American Museum of Natural History