Skip to Main content Skip to Navigation
Journal articles

A new Miocene baleen whale from Peru deciphers the dawn of cetotheriids

Abstract : Cetotheriidae are an iconic, nearly extinct family of baleen whales (Mysticeti) with a highly distinct cranial morphology. Their origins remain a mystery, with even the most archaic species showing a variety of characteristic features. Here, we describe a new species of archaic cetotheriid, Tiucetus rosae, from the Miocene of Peru. The new material represents the first mysticete from the poorly explored lowest portion of the highly fossiliferous Pisco Formation (allomember P0), and appears to form part of a more archaic assemblage than observed at the well-known localities of Cerro Colorado, Cerro los Quesos, Sud-Sacaco and Aguada de Lomas. Tiucetus resembles basal plicogulans (crown Mysticeti excluding right whales), such as Diorocetus and Parietobalaena, but shares with cetotheriids a distinct morphology of the auditory region, including the presence of an enlarged paroccipital concavity. The distinctive morphology of Tiucetus firmly places Cetotheriidae in the context of the poorly understood 'cetotheres' sensu lato, and helps to resolve basal relationships within crown Mysticeti.
Document type :
Journal articles
Complete list of metadata

Cited literature [48 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-02612076
Contributor : Christian De Muizon Connect in order to contact the contributor
Submitted on : Monday, May 18, 2020 - 9:50:20 PM
Last modification on : Friday, August 5, 2022 - 9:25:40 AM

File

185-2017 Marx et al.pdf
Publisher files allowed on an open archive

Identifiers

Citation

Felix G Marx, Olivier Lambert, Christian de Muizon. A new Miocene baleen whale from Peru deciphers the dawn of cetotheriids. Royal Society Open Science, The Royal Society, 2017, 4 (9), ⟨10.1098/rsos.170560⟩. ⟨hal-02612076⟩

Share

Metrics

Record views

131

Files downloads

33