Registro de Moridae (Teleostei: Gadiformes) en la Formación Chenque (Oligoceno Tardío-Mioceno Temprano) de la provincia de Chubut, Argentina

Sergio Bogan,Federico Agnolin

doi:10.22179/revmacn.13.218

Sergio Bogan, Federico Agnolin

Open Access

https://doi.org/10.22179/revmacn.13.218

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Abstract

Record of Moridae (Teleostei: Gadiformes) from the Chenque Formation (Late Oligocene - Early Miocene) from the Chubut province, Argentina. A nearly complete specimen belonging to the family Moridae is described in this paper. The material has been collected in outcrops referable to the Chenque Formation (Oligocene-Miocene) from the Chubut province, Argentina. The specimen constitutes the first fossil record for the Gadiformes in Argentina and one of the first osteological occurrences for Moridae. The morphology of the specimen suggests affinities with the genera Physiculus and Salilota. The presence of Moridae in the Early Miocene of Patagonia and New Zealand is in agreement with previous hypotheses suggesting marine transantarctic connections between both landmasses during Late Oligocene - Early Miocene times.

Highlights

Resumen: En el presente trabajo se describen restos de un especimen relativamente completo perteneciente a la familia Moridae
The material has been collected in outcrops referable to the Chenque Formation (Oligocene-Miocene) from the Chubut province, Argentina
The presence of Moridae in the Early Miocene of Patagonia and New Zealand is in agreement with previous hypotheses suggesting marine transantarctic connections between both landmasses during Late Oligocene - Early Miocene times

Summary

Introduction

Los sedimentos de la Formación Chenque presentan una abundante fauna de invertebrados fósiles (del Río, 2002), especialmente rica en restos de moluscos; gran parte de los taxones identificados para esta transgresión marina corresponden a formas comunes con el Terciario de Nueva Zelanda (Beu et al, 1997), planteándose la existencia de corrientes marinas que permitieron la migración de taxones entre ambas regiones geográficas durante el lapso Oligoceno Tardío Mioceno Temprano (Beu et al, 1997; del Río, 2002).

Results

Conclusion