INIBIOMA 20415
INSTITUTO DE INVESTIGACIONES EN BIODIVERSIDAD Y MEDIOAMBIENTE
Unidad Ejecutora - UE
artículos
Título:
The endocranial morphology and inner ear of the abelisaurid theropod Aucasaurus garridoi
Autor/es:
PAULINA CARABAJAL, A.; SUCCAR, C.
Revista:
ACTA PALAEONTOLOGICA POLONICA
Editorial:
INST PALEOBIOLOGII PAN
Referencias:
Lugar: Varsovia; Año: 2015 vol. 60 p. 141 - 144
ISSN:
0567-7920
Resumen:
A partial cranial endocast and right inner ear of the Cretaceous abelisaurid dinosaurAucasaurus garridoi were digitally reconstructed from CT scans. The forebrain,midbrain, and hindbrain resemble the morphology described for the abelisauridsMajungasaurus and Indosaurus. However, Aucasaurus exhibits a floccular process thatis relatively larger than that of Majungasaurus. In Aucasaurus the flocculus is enclosedin an 8-shaped floccular recess, similar in shape and size to that observed in Abelisaurus,suggesting that the two Patagonian taxa were capable of a slightly wider range ofmovements of the head. Here we describe the second inner ear known for theAbelisauridae. The labyrinth of the inner ear is similar in shape and size to thesemicircular canals of Majungasaurus, although the lateral semicircular canal is shorterin Aucasaurus.
