The affinities of Notocetus vanbenedeni, an early Miocene platanistoid (Cetacea, Mammalia) from Patagonia, southern Argentina. American Museum novitates ; no. 2904

Simple item page
dc.contributor.authorMuizon, Christian de.en_US
dc.date.accessioned2005-10-06T18:07:19Z
dc.date.available2005-10-06T18:07:19Z
dc.date.issued1987en_US
dc.description27 p. : ill. ; 26 cm.en_US
dc.descriptionIncludes bibliographical references (p. 25-27).en_US
dc.description.abstract"The study of previously undescribed material of the early Miocene odontocete cetacean Notocetus vanbenedeni allows a new interpretation of its relationships, and a reevaluation of the taxon Platanistoidea. The new specimen consists of a well preserved auditory region (periotic, tympanic, malleus, stapes, squamosal, and partial occipital) associated with several teeth and some postcranial elements (scapula, vertebrae, and rib fragments). The presence of an articular rim on the periotic and the morphology of the tympanic demonstrate the close relationship of Notocetus with the Platanistidae. Notocetus is referable to the family Squalodelphidae, which also includes the genera Squalodelphis and Phocageneus. This family is the sister-group of the Platanistidae, which consists of the genera Platanista, Zarachis, and Pomatodelphis. Platanistidae and Squalodelphidae are regarded as the sister-groups of the Squalodontidae on the basis of two synapomorphies of the scapula: the loss of the coracoid process and the acromion located on the anterior edge. These three families (Platanistidae, Squalodelphidae, and Squalodontidae) constitute the Platanistoidea. The Squalodontidae, however, may be poly- or paraphyletic as they are defined by symplesiomorphies only; they are not analyzed here and the group is tentatively regarded as monophyletic. The phylogenetic relationships of this family will be considered elsewhere. The ziphiid affinities of Notocetus vanbenedeni, assumed by some previous workers, are rejected. The Ziphiidae could, however, have their origin in some squalodont-like odontocetes, a statement which favors a possible polyphyletism of the Squalodontidae. Notocetus is an Argentinian genus, but the occurrence of a periotic and a partial tympanic from the Calvert Formation of Maryland extends the distribution of the genus to the Middle Miocene of North America"--P. [1].en_US
dc.format.extent6700142 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/5165
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, N.Y. : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates ; no. 2904en_US
dc.subject.lccQL1 .A436 no.2904, 1987en_US
dc.subject.lcshNotocetus vanbenedeni.en_US
dc.subject.lcshPlatanistoideaen_US
dc.subject.lcshCetacea, Fossil -- Patagonia (Argentina and Chile)en_US
dc.subject.lcshCetacea, Fossil -- Argentina.en_US
dc.subject.lcshMammals, Fossil -- Patagonia (Argentina and Chile)en_US
dc.subject.lcshMammals, Fossil -- Argentina.en_US
dc.subject.lcshPaleontology -- Miocene -- Patagonia (Argentina and Chile)en_US
dc.subject.lcshPaleontology -- Miocene -- Argentina.en_US
dc.subject.lcshPaleontology -- Patagonia (Argentina and Chile)en_US
dc.subject.lcshPaleontology -- Argentina.en_US
dc.titleThe affinities of Notocetus vanbenedeni, an early Miocene platanistoid (Cetacea, Mammalia) from Patagonia, southern Argentina. American Museum novitates ; no. 2904en_US
dc.typetexten_US

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
/v2/dspace/ingest/pdfSource/nov/N2904.pdf
Size:
6.39 MB
Format:
Adobe Portable Document Format
Description:
Download

Collections

American Museum Novitates