Phylogenetic relationships among the Notharctinae of North America

American Journal of Physical Anthropology
H H Covert

Abstract

Study of over 1,000 specimens representing all notharctine genera and species leads to the conclusion that current concepts about the relationships of genera within the Notharctinae are incorrect. The following describes the more probable relationships among these genera. 1) Smilodectes and Notharctus are more closely related to each other than either is to any known early Eocene notharctine. Synapomorphies linking these genera include relatively narrow upper and lower molars, a relatively low-crowned P4, and paraconid size reduction on M1-3. 2) Among known Wasatchian notharctines, a clade consisting of Copelemur tutus and Cop. praetutus shares several lower molar synapomorphies with the Notharctus-Smilodectes clade, and therefore appears to form the Wasatchian sister group of Bridgerian notharctines. Synapomorphies documenting this relationship include well-developed entoconid notches on P4-M2, an anteriorly placed paraconid on M2, and a long premetacristid on M2. 3) Copelemur and Pelycodus are independently derived from early North American Cantius. Recent suggestions that the European adapine taxa Leptadapis priscus and Microadapis sciureus share special phylogenetic relationships with Smilodectes are rejected. The reduced (...Continue Reading

References

Mar 1, 1977·American Journal of Physical Anthropology·R F Kay
Jan 1, 1982·Folia primatologica; international journal of primatology·J H Schwartz, I Tattersall
Jan 1, 1982·American Journal of Primatology·J H Schwartz, Ian Tattersall

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Citations

Aug 6, 2002·Journal of Human Evolution·Nobuo ShigeharaTin Thein
Sep 22, 2016·Journal of Human Evolution·Arianna R HarringtonJonathan I Bloch
Jun 1, 1997·American Journal of Physical Anthropology·C E Wall
Apr 18, 2006·American Journal of Physical Anthropology·Rachel H DunnD Tab Rasmussen

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