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Phylogeny and systematics of Squamata (Reptilia) based on morphology ; Bulletin of the American Museum of Natural History, no. 310

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dc.contributor.author Conrad, Jack L. en_US
dc.date.accessioned 2008-06-13T17:45:30Z
dc.date.available 2008-06-13T17:45:30Z
dc.date.issued 2008 en_US
dc.identifier.uri http://hdl.handle.net/2246/5915
dc.description 182 p. : ill. ; 26 cm. en_US
dc.description Includes bibliographical references (p. 144-164). en_US
dc.description.abstract Squamata (amphisbaenians, "lizards," mosasaurs, and snakes) is an extremely diverse clade with a rich fossil record. There is little consensus about the interrelationships of the major squamate clades (i.e., Iguania, Gekkota, Scincomorpha, Anguimorpha, Amphisbaenia, and Serpentes), or even the membership of some of these clades. Morphology-based cladistic analyses typically agree only that the major dichotomy in extant squamates is between Iguania and all other taxa. The phylogenetic placement of Amphisbaenia and Serpentes is particularly problematic. Incomplete taxon sampling is likely a major contributing factor to the absence of a consensus about squamate interrelationships. This study examines squamate relationships using 222 ingroup taxa scored for 363 morphological characters. Analysis of these data recovered 2,213 equally short trees with a length of 3,273 steps and a retention index of 0.7164. The results confirm the monophyly of the clades Scleroglossa (extant squamates exclusive of Iguania), Gekkota, Scincomorpha, Lacertoidea, Scincoidea, Anguimorpha, Carusioidea, Platynota, and Varanoidea. Novel results include the identification of a clade containing Scincidae sensu lato, Dibamidae, Amphisbaenia, and Serpentes; identification of a Mesozoic clade containing Bainguis, Eoxanta lacertifrons, Globaura venusta, and Myrmecodaptria; and identification of Dalinghosaurus as a basal shinisaur. A new taxonomic scheme is outlined. The names Iguanomorpha, Scincogekkonomorpha, Evansauria, and Mosasauriformes are applied to the stem-based groups including Iguania, Scleroglossa, Autarchoglossa, and Mosasauria, respectively. The importance of strict rigidity within taxonomy is questioned; taxonomy is most useful as a tool for communication about organisms or groups of organisms. en_US
dc.format.extent 31410880 bytes
dc.format.extent 210429 bytes
dc.format.mimetype application/pdf
dc.format.mimetype application/pdf
dc.language eng en_US
dc.language.iso en_US
dc.publisher New York, NY : American Museum of Natural History en_US
dc.relation.ispartofseries Bulletin of the American Museum of Natural History, no. 310 en_US
dc.subject.lcc QH1 .A4 no.310 2008 en_US
dc.subject.lcsh Squamata -- Phylogeny. en_US
dc.subject.lcsh Squamata en_US
dc.subject.lcsh Reptiles -- Phylogeny. en_US
dc.subject.lcsh Reptiles en_US
dc.title Phylogeny and systematics of Squamata (Reptilia) based on morphology ; Bulletin of the American Museum of Natural History, no. 310 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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