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<a href="http://doi.org/10.1671/0272-4634(2001)021%5B0132:nsoerm%5D2.0.co;2" target="_blank" rel="noreferrer noopener">http://doi.org/10.1671/0272-4634(2001)021%5B0132:nsoerm%5D2.0.co;2</a>
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Pages
132-152
Issue
1
Volume
21
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Title
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New specimens of Elphidotarsius russelli (Mammalia, ?Primates, Carpolestidae) and a revision of plesiadapoid relationships
Publisher
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Journal of Vertebrate Paleontology
Date
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2001
2001-03
Subject
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alberta; evolution; late; ordered characters; outgroups; paleocene; Paleontology; parsimony; plesiadapiformes; primatomorpha; pronothodectes-gaoi fox; systematic position
Creator
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Silcox M T; Krause D W; Maas M C; Fox R C
Description
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Significant new material of the plesiadapiform Elphidotarsius russelli is described from Montana and Alberta. Previously the most poorly documented carpolestid, this species is now known from numerous isolated teeth and many jaw fragments. New material from the Crazy Mountains Basin, Montana substantially extends its known geographic range and shows that E. russelli is the most derived species of Elphidotarsius, with many features that foreshadow characteristics of Carpodaptes; consequently, emending the diagnosis of Elphidotarsius has been necessary. A phylogenetic analysis based on 73 characters scored for all species of Elphidotarsius. Pronothodectes, and Saxonella, as well as Purgatorius unio, Purgatorius janisae, Pandemonium dis, Chronolestes simul, and Carpodaptes hazelae, indicates that Elphidotarsius is a paraphyletic stem taxon at the base of Carpolestidae. Numerous crossing synapo-morphies among these taxa show that a single anagenetic lineage can no longer represent the evolution of early carpolestids. This analysis also clarifies basal plesiadapoid relationships. Carpolestidae is the sister taxon to Plesiadapidae, and Saxonellidae is sister group to the carpolestid/plesiadapid clade. Contrary to previous hypotheses, Chronolestes and Pandemonium are found to lie outside of a clade including the other members of Carpolestidae, Saxonellidae, and Plesiadapidae, implying that they are basal plesiadapoids that diverged before the evolution of the common ancestor to the three main plesiadapoid families.
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<a href="http://doi.org/10.1671/0272-4634(2001)021%5B0132:nsoerm%5D2.0.co;2" target="_blank" rel="noreferrer noopener">10.1671/0272-4634(2001)021%5B0132:nsoerm%5D2.0.co;2</a>
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Journal Article
2001
alberta
Evolution
Fox R C
Journal Article
Journal of Vertebrate Paleontology
Krause D W
late
Maas M C
ordered characters
outgroups
paleocene
Paleontology
parsimony
plesiadapiformes
primatomorpha
pronothodectes-gaoi fox
Silcox M T
systematic position