A Miocene pygmy right whale fossil from Australia-Reference-Cited by-同舟云学术

A Miocene pygmy right whale fossil from Australia

Published:2018-06-22 Issue: Volume:6 Page:e5025
ISSN:2167-8359
Container-title:PeerJ
language:en
Short-container-title:

Author:

Marx Felix G.¹²³,Park Travis²⁴,Fitzgerald Erich M.G.³⁴⁵,Evans Alistair R.²³

Affiliation:

1. Directorate of Earth and History of Life, Royal Belgian Institute of Natural Sciences, Brussels, Belgium

2. School of Biological Sciences, Monash University, Clayton, Victoria, Australia

3. Palaeontology, Museums Victoria, Melbourne, Victoria, Australia

4. Department of Life Sciences, Natural History Museum, London, United Kingdom

5. National Museum of Natural History, Smithsonian Institution, Washington, D.C., United States of America

Abstract

Neobalaenines are an enigmatic group of baleen whales represented today by a single living species: the pygmy right whale, Caperea marginata, found only in the Southern Hemisphere. Molecular divergence estimates date the origin of pygmy right whales to 22–26 Ma, yet so far there are only three confirmed fossil occurrences. Here, we describe an isolated periotic from the latest Miocene of Victoria (Australia). The new fossil shows all the hallmarks of Caperea, making it the second-oldest described neobalaenine, and the oldest record of the genus. Overall, the new specimen resembles C. marginata in its external morphology and details of the cochlea, but is more archaic in it having a hypertrophied suprameatal area and a greater number of cochlear turns. The presence of Caperea in Australian waters during the Late Miocene matches the distribution of the living species, and supports a southern origin for pygmy right whales.

Funder

Marie Skłodowska-Curie Global Postdoctoral fellowship

Marie Skłodowska-Curie Individual Fellowship

Publisher

PeerJ

Subject

General Agricultural and Biological Sciences,General Biochemistry, Genetics and Molecular Biology,General Medicine,General Neuroscience

Link

https://peerj.com/articles/5025.pdf

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