Neuromorfología de Utaetus buccatus (Xenarthra, Dasypodidae): un armadillo del Eoceno temprano de la provincia del Chubut, Argentina.

DOZO, MARÍA TERESA

AMEGHINIANA

ASOCIACION PALEONTOLOGICA ARGENTINA

Lugar: Buenos Aires; Año: 1998 vol. 35 p. 285 - 289

0002-7014

This Casamayoran armadillo provides the only known evidence of the skull structure in xenarthrans prior to the Oligocene. An endocranial cast of the neotype was prepared and studied in order to make comparisons with living Dasypodidae. The brain of U. buccatus has a single prominent neocortical sulcus in the frontoparietal part of each hemisphere and an ininterrupted rhinal fissure. This inferred neocortex is very different from the neocortical model that characterizes living armadillos.