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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.author Eldredge, Niles. en_US
dc.date.accessioned 2005-10-06T14:23:54Z
dc.date.available 2005-10-06T14:23:54Z
dc.date.issued 1973 en_US
dc.identifier.uri http://hdl.handle.net/2246/599
dc.description p. 287-337 : ill. ; 27 cm. en_US
dc.description Includes 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.extent 21749429 bytes
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York : [American Museum of Natural History] en_US
dc.relation.ispartofseries Bulletin of the American Museum of Natural History ; v. 151, article 4 en_US
dc.subject.lcsh Phacops. en_US
dc.subject.lcsh Trilobites -- United States. en_US
dc.subject.lcsh Trilobites -- Canada. en_US
dc.subject.lcsh Arthropoda, Fossil -- United States. en_US
dc.subject.lcsh Arthropoda, Fossil -- Canada. en_US
dc.subject.lcsh Paleontology -- Devonian -- United States. en_US
dc.subject.lcsh Paleontology -- Devonian -- Canada. en_US
dc.subject.lcsh Paleontology -- United States. en_US
dc.subject.lcsh Paleontology -- Canada. en_US
dc.title Systematics of Lower and Lower Middle Devonian species of the trilobite Phacops Emmrich in North America. Bulletin of the AMNH ; v. 151, article 4 en_US
dc.type text en_US


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  • Bulletin of the American Museum of Natural History
    The Bulletin, published continuously since 1881, consists of longer monographic volumes in the field of natural sciences relating to zoology, paleontology, and geology. Current numbers are published at irregular intervals. The Bulletin was originally a place to publish short papers, while longer works appeared in the Memoirs. However, in the 1920s, the Memoirs ceased and the Bulletin series began publishing longer papers. A new series, the Novitates , published short papers describing new forms.

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