The early Miocene balaenid Morenocetus parvus from Patagonia (Argentina) and the evolution of right whales

Mostrar todas las versiones(2)

Balaenidae (right and bowhead whales) are a key group in understanding baleen whale evolution, because they are the oldest surviving lineage of crown Mysticeti, with a fossil record that dates back ~20 million years. However, this record is mostly Pliocene and younger, with most of the Miocene histo...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Buono, Mónica Romina, Fernández, Marta Susana, Cozzuol, Mario A., Cuitiño, José I., Fitzgerald, Erich M.G.
Formato: Articulo
Lenguaje:Inglés
Publicado: 2017
Materias:
Paleontología
Balaenidae
Evolution
Mysticeti
Neogene
Patagonia
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/87470
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-87470
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Balaenidae
Evolution
Mysticeti
Neogene
Patagonia
spellingShingle Paleontología
Balaenidae
Evolution
Mysticeti
Neogene
Patagonia
Buono, Mónica Romina
Fernández, Marta Susana
Cozzuol, Mario A.
Cuitiño, José I.
Fitzgerald, Erich M.G.
The early Miocene balaenid Morenocetus parvus from Patagonia (Argentina) and the evolution of right whales
topic_facet Paleontología
Balaenidae
Evolution
Mysticeti
Neogene
Patagonia
description Balaenidae (right and bowhead whales) are a key group in understanding baleen whale evolution, because they are the oldest surviving lineage of crown Mysticeti, with a fossil record that dates back ~20 million years. However, this record is mostly Pliocene and younger, with most of the Miocene history of the clade remaining practically unknown. The earliest recognized balaenid is the early Miocene Morenocetus parvus Cabrera, 1926 from Argentina. M. parvus was originally briefly described from two incomplete crania, a mandible and some cervical vertebrae collected from the lower Miocene Gaiman Formation of Patagonia. Since then it has not been revised, thus remaining a frequently cited yet enigmatic fossil cetacean with great potential for shedding light on the early history of crown Mysticeti. Here we provide a detailed morphological description of this taxon and revisit its phylogenetic position. The phylogenetic analysis recovered the middle Miocene Peripolocetus as the earliest diverging balaenid, and Morenocetus as the sister taxon of all other balaenids. The analysis of cranial and periotic morphology of Morenocetus suggest that some of the specialized morphological traits of modern balaenids were acquired by the early Miocene and have remained essentially unchanged up to the present. Throughout balaenid evolution, morphological changes in skull arching and ventral displacement of the orbits appear to be coupled and functionally linked to mitigating a reduction of the field of vision. The body length ofMorenocetus and other extinct balaenids was estimated and the evolution of body size in Balaenidae was reconstructed. Optimization of body length on our phylogeny of Balaenidae suggests that the primitive condition was a relatively small body length represented by Morenocetus, and that gigantism has been acquired independently at least twice (in Balaena mysticetus and Eubalaena spp.), with the earliest occurrence of this trait in the late Miocene-early Pliocene as represented by Eubalaena shinshuensis.
format Articulo
Articulo
author Buono, Mónica Romina
Fernández, Marta Susana
Cozzuol, Mario A.
Cuitiño, José I.
Fitzgerald, Erich M.G.
author_facet Buono, Mónica Romina
Fernández, Marta Susana
Cozzuol, Mario A.
Cuitiño, José I.
Fitzgerald, Erich M.G.
author_sort Buono, Mónica Romina
title The early Miocene balaenid Morenocetus parvus from Patagonia (Argentina) and the evolution of right whales
title_short The early Miocene balaenid Morenocetus parvus from Patagonia (Argentina) and the evolution of right whales
title_full The early Miocene balaenid Morenocetus parvus from Patagonia (Argentina) and the evolution of right whales
title_fullStr The early Miocene balaenid Morenocetus parvus from Patagonia (Argentina) and the evolution of right whales
title_full_unstemmed The early Miocene balaenid Morenocetus parvus from Patagonia (Argentina) and the evolution of right whales
title_sort early miocene balaenid morenocetus parvus from patagonia (argentina) and the evolution of right whales
publishDate 2017
url http://sedici.unlp.edu.ar/handle/10915/87470
work_keys_str_mv AT buonomonicaromina theearlymiocenebalaenidmorenocetusparvusfrompatagoniaargentinaandtheevolutionofrightwhales
AT fernandezmartasusana theearlymiocenebalaenidmorenocetusparvusfrompatagoniaargentinaandtheevolutionofrightwhales
AT cozzuolmarioa theearlymiocenebalaenidmorenocetusparvusfrompatagoniaargentinaandtheevolutionofrightwhales
AT cuitinojosei theearlymiocenebalaenidmorenocetusparvusfrompatagoniaargentinaandtheevolutionofrightwhales
AT fitzgeralderichmg theearlymiocenebalaenidmorenocetusparvusfrompatagoniaargentinaandtheevolutionofrightwhales
AT buonomonicaromina earlymiocenebalaenidmorenocetusparvusfrompatagoniaargentinaandtheevolutionofrightwhales
AT fernandezmartasusana earlymiocenebalaenidmorenocetusparvusfrompatagoniaargentinaandtheevolutionofrightwhales
AT cozzuolmarioa earlymiocenebalaenidmorenocetusparvusfrompatagoniaargentinaandtheevolutionofrightwhales
AT cuitinojosei earlymiocenebalaenidmorenocetusparvusfrompatagoniaargentinaandtheevolutionofrightwhales
AT fitzgeralderichmg earlymiocenebalaenidmorenocetusparvusfrompatagoniaargentinaandtheevolutionofrightwhales
bdutipo_str Repositorios
_version_ 1764820490092806149

Ejemplares similares