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Drilling predation on Antarctic tusk shells: first records on Recent scaphopods from the Southern Hemisphere

Published online by Cambridge University Press:  24 May 2021

Sandra Gordillo*
Affiliation:
Universidad Nacional de Córdoba, Facultad de Filosofía y Humanidades, Museo de Antropología, Córdoba, Argentina Consejo Nacional de Investigaciones Científicas y Tecnológicas (CONICET), Instituto de Antropología de Córdoba (IDACOR), Avda. Hipólito Yrigoyen 174, X5000JHO, Córdoba, Argentina
Mariano E. Malvé
Affiliation:
Facultad de Ciencias Naturales y Ciencias de la Salud, Universidad Nacional de la Patagonia San Juan Bosco, Ruta Provincial 1 s/n, 9000, Comodoro Rivadavia, Argentina

Abstract

Drillholes on shells are one of the few predation marks preserved in fossil molluscs, providing an opportunity to study and quantify predator-prey interactions in the palaeontological record. Among these, reports of drilling predation on scaphopods are rare, and such information from Antarctica is non-existent. We describe the finding of drillholes on scaphopods recovered from Recent mollusc assemblages between depths of 246.5 and 454.0 m in West Antarctica. The predation traces located in the middle sectors of two preyed shells belonging to Siphonodentalium dalli and Dentalium majorinum are identified as Oichnus and are interpreted as produced by naticids, probably Pseudamauropsis aureolutea. These new records constitute the first reports of drilling predation on scaphopods in Antarctica and also for Recent scaphopods of the Southern Hemisphere.

Type
Biological Sciences
Copyright
Copyright © Antarctic Science Ltd 2021

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