INVESTIGADORES
DOZO Maria Teresa
artículos
Título:
Paleoneurología de Dolicavia minuscula (Rodentia, Caviidae) y Paedotherium insigne (Notoungulata, Hegetotheriidae) del Plioceno de Buenos Aires, Argentina.
Autor/es:
DOZO, MARÍA TERESA
Revista:
AMEGHINIANA
Editorial:
ASOCIACION PALEONTOLOGICA ARGENTINA
Referencias:
Lugar: Buenos Aires; Año: 1997 vol. 34 p. 427 - 435
ISSN:
0002-7014
Resumen:
Based on a
paleoneurological study, the external neuromorphological characters of a
Caviidae rodent (Dolicavia minuscula) and a Hegetotheriidae notoungulate
(Paedotherium insigne) from Chapadmalal Formation, are interpreted. The
endocasts of these species show similar external brain morphologies including
the same pattern of neocortical sulci. Comparisons with brains of their
possible ecological equivalents, rodents and lagomorphs, suggest that the brain
of Paedotherium insigne is similar to those of Caviidae, particularly
Caviinae (Cavia, Dolicavia). Also, this brain shares the same
pattern that it is interpreted in others Hegetotheriidae (Hegetotherium,
Pachyrukhos). It is proposed that the neuromorphological convergence
between Hegetotheriidae and Caviidae has been closer than it is inferred from
the osteological and dental characters. Indices of encephalization were
computed. The relative brain size of P. insigne is lower than that of D.
minuscula, being the last one at the level of the living Caviidae.