Apparent cannibalism in Polinices marambioensis (Naticidae) from La Meseta Formation (Eocene), Antarctic Peninsula

CECH, N.; BREZINA, S.; CASADÍO, S.

Mendoza

Congreso; 4th International Palaeontological Congress; 2014

Cricyt

Polinices marambioensis Stilwell y Zinsmeister, 1992, is a naticid gastropod which is the most common constituent in fossils accumulation in the upper section of Cucullaea I Allomember (Eocene), at the La Meseta Formation, in the Jame Ross Basin of the Antarctic Peninsula. This is the unique naticid species registered in the Formation. These species probably was an important predator of infaunal bivalves and gastropods including other naticids. The aim of this work is to contribute to the knowledge of predatory pattern of P. marambioensis and to assess possible cannibal behavior. A total of 2,648 specimens were collected from three different levels (M10, M12 and M13) of the accumulations