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A new species of Gaylordia Paula Couto (Mammalia, Metatheria) from Itaboraí, Brazil

2015; Volume: 18; Issue: 1 Linguagem: Inglês

10.4072/rbp.2015.1.07

ISSN

2236-1715

Autores

Édison Vicente Oliveira, Francisco J. Goin,

Tópico(s)

Bat Biology and Ecology Studies

Resumo

We describe a new metatherian of the genus Gaylordia Paula Couto, from the early Eocene Itaboraí Basin, Brazil.This new species (estimated body mass ~60-90.9g) is based on lower and upper dentition elements and is characterized by a more plesiomorphic dental morphology with respect to G. macrocynodonta Paula Couto (with a larger body mass, estimated in ~74-103 g for large individuals or males).The species G. doelloi Marshall, represented by small individuals or females, is regarded a junior synonym of G. macrocynodonta.A phylogenetic analysis as well as details of the occlusal surface of its upper and lower molars suggests that Gaylordia is closely related to the Pucadelphyidae, a non-marsupial "ameridelphian" group previously recorded at the early Paleocene locality of Tiupampa, Bolivia.

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