PALEOECOLOGY OF BONAPARTHERIOIDEA (MARSUPIALIA, POLYDOLOPIMORPHIA, BONAPARTHERIIFORMES). The wear pattern, occlusal movement, body mass, and diversity of Bonapartherioidea families are analyzed. Hypothesis for the dietary habits and possible extinction causes are developed. Bonaparteroids are divided into three groups according to the development of Phase II in the chewing cycle. Grinding facet 5 is not developed in Prepidolopidae, is slightly developed in Rosendolopidae, and is broadly developed in Bonapartheriidae and Gashterniidae. Lateral movements characterize the occlusion of Prepidolopidae and Rosendolopidae, while oblique movements are typical of Bonapartheriidae and Gashterniidae. During the Peligran age—Vacan subage, species of Bonaparteroids occupied frugivorous, insectivorous, and folivorous niches. From the Barrancan age to La Cantera fauna, they mostly occupied the granivorous and insectivorous niches. Bonaparteroids became extinct during the Eocene/ Oligocene boundary, probably associated with an abrupt fall in temperature and precipitations.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 51 • No. 2