A phylogenetic study of living and fossil platyrrhines. American Museum novitates ; no. 3269

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dc.contributor.authorHorovitz, Inés.en_US
dc.date.accessioned2005-10-06T16:48:07Z
dc.date.available2005-10-06T16:48:07Z
dc.date.issued1999en_US
dc.description40 p. : ill. ; 26 cm.en_US
dc.descriptionIncludes bibliographical references (p. 28-33).en_US
dc.description.abstract"A phylogenetic analysis of the 16 genera of living platyrrhines (New World monkeys) and 20 fossil taxa of the same group was undertaken. Analyses were conducted on two data sets: one was restricted to morphological characters and the other was a combination of those morphological characters and DNA sequence characters belonging to the 16S and 12S mito-chondrial genes and the e-globin and IRBP nuclear genes. In neither case could all taxa be included without large loss in resolution when the strict consensus trees were computed: the maximum number of fossil taxa that could be included was 11 with the first data set, and 18 with the second; relationships differed between the two. In the simultaneous analysis of mor-phological and molecular data, relationships among Recent taxa remained invariant regardless of what fossil taxa were included. This allowed a comparison of character changes along branches between a tree including Recent taxa only and a tree including the fossil species and to evaluate the influence that the addition of fossils has on our understanding of character evolution. When fossils were added, branch support values decreased substantially (i.e., for callitrichines and pitheciins) with the following contributing factors: (1) characters were not as clustered in some nodes as in the phylogeny of Recent taxa only but scattered among a larger number of nodes; (2) high numbers of fossils had missing entries, which contributed to their being ubiquitous and accommodating in many topologies; and (3) adding taxa increased the degree of homoplasy and in some cases caused a higher instability for some clades. It is apparent that a high Bremer value may be the result of extinctions and taxonomic incomplete-ness, rather than correspondence to reality"--P. [1].en_US
dc.format.extent5451915 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/3049
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, NY : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates ; no. 3269en_US
dc.subject.lccQL1 .A436 no.3269, 1999en_US
dc.subject.lcshCebidaeen_US
dc.subject.lcshCebidae, Fossil.en_US
dc.subject.lcshMammals -- South Americaen_US
dc.subject.lcshMammals -- Caribbean Areaen_US
dc.subject.lcshMammals, Fossil -- South America.en_US
dc.subject.lcshMammals, Fossil -- Caribbean Area.en_US
dc.subject.lcshPaleontology -- South America.en_US
dc.subject.lcshPaleontology -- Caribbean Area.en_US
dc.titleA phylogenetic study of living and fossil platyrrhines. American Museum novitates ; no. 3269en_US
dc.typetexten_US

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