INVESTIGADORES
TALEVI Marianella
artículos
Título:
Bioerosion structures in a Late Cretaceous mosasaur from Antarctica
Autor/es:
TALEVI, MARIANELLA; BREZINA, SOLEDAD
Revista:
FACIES
Editorial:
SPRINGER
Referencias:
Año: 2019 vol. 65
ISSN:
0172-9179
Resumen:
Bioerosive structures in the cortical region of a vertebra from a mosasaur fall in the López de Bertodano Formation (UpperMaastrichtian) in Seymour Island (Isla Marambio), Antarctica, are reported. The traces studied are similar but not coincidentwith the described microborings in other fossil bone remains. The morphology and extension of these bioerosive structuresare considered as the result of the activity of endolithic organisms on the original vascular channels of the bone. They areapproximately straight, anastomosed, and commonly filled with an opaque mineral and framboidal pyrite. As most of thebone structure is well preserved, only the small portion of the cortical region was exposed to the microorganisms? activity.This would mean that the mosasaur individual died well earlier than the burial event. This is their first report of this type ofbioerosive structures in a mosasaur fall.
