Side-necked turtle lower jaws (Podocnemididae, Bothremydidae) from the late Cretaceous Maevarano Formation of Madagascar. American Museum novitates ; no. 3397

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dc.contributor.authorGaffney, Eugene S.en_US
dc.contributor.authorForster, Cathy.en_US
dc.date.accessioned2005-10-06T16:39:31Z
dc.date.available2005-10-06T16:39:31Z
dc.date.issued2003en_US
dc.description13 p. : ill. ; 26 cm.en_US
dc.descriptionIncludes bibliographical references (p. 12-13).en_US
dc.description.abstractTwo lower jaws from the upper part (early Maastrichtian) of the late Cretaceous Maevarano Formation in the Mahajanga Basin, northwestern Madagascar, are identified as belonging to side-necked turtles (Pleurodira). A nearly complete lower jaw is identified as cf. Erymnochelys because of its close resemblance to the living Malagasy Erymnochelys madagascariensis. Both uniquely possess the combination of a posteriorly directed processus retroarticularis and a nearly identical triturating surface that is narrow anteriorly with a horizontal labial ridge and a dorsally rising lingual ridge. A second specimen, consisting of an incomplete symphyseal region, is questionably identified as Bothremydidae on the basis of a thick wedge-shaped symphysis with partial or complete pits on the rami. The cf. Erymnochelys specimen is the oldest record of Erymnochelys or a taxon very similar to it, and it indicates the persistence of a Mesozoic element in the extant Malagasy turtle fauna. The possible bothremydid jaw suggests a more cosmopolitan element now extinct.en_US
dc.format.extent408750 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2246/2823
dc.languageengen_US
dc.language.isoen_US
dc.publisherNew York, NY : American Museum of Natural Historyen_US
dc.relation.ispartofseriesAmerican Museum novitates ; no. 3397en_US
dc.subject.lccQL1 .A436 no.3397 2003en_US
dc.subject.lcshTurtles, Fossil -- Madagascar -- Mahajanga (Province)en_US
dc.subject.lcshMandible.en_US
dc.subject.lcshReptiles, Fossil -- Madagascar -- Mahajanga (Province)en_US
dc.subject.lcshPaleontology -- Cretaceous -- Madagascar -- Mahajanga (Province)en_US
dc.subject.lcshPaleontology -- Madagascar -- Mahajanga (Province)en_US
dc.titleSide-necked turtle lower jaws (Podocnemididae, Bothremydidae) from the late Cretaceous Maevarano Formation of Madagascar. American Museum novitates ; no. 3397en_US
dc.title.alternativeSidenecked turtle lower jawsen_US
dc.typetexten_US

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