Artículo
Evolutionary transformations of the malleus in pinnipeds, with emphasis on Southern Hemisphere taxa
Loza, Cleopatra Mara
; Rutimann, Oliver; Sanchez Villagra, Marcelo R.; Carlini, Alfredo Armando
; Aguirre Fernández, Gabriel
Fecha de publicación:
07/2018
Editorial:
University of Amsterdam
Revista:
Contributions To Zoology
ISSN:
1875-9866
e-ISSN:
1383-4517
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The systematic value of the middle-ear ossicles, in particular the malleus, has been long recognized for diverse groups. We present here systematic work on middle-ear ossicle characters of pinnipeds, focusing on until now poorly studied Southern Hemisphere species. Mallei were extracted from specimens representing 16 specimens of pinnipeds (from five austral species of Phocidae and two of Otariidae, and one northern Phocidae) and two extinct species. Many characters used in this study were introduced previously, but some were here modified. Three new characters are here defined and analysed, and all the characters were mapped onto the phylogeny. Our character analysis serves to elucidate the transformations that have occurred in the evolution of middle ear ossicles in pinnipeds and to identify diagnostic features of many of its clades. Beyond the identification of specific changes within the clade, our study of pinniped ossicle evolution documents the occurrence of anatomical convergences with other groups of mammals that live in an aquatic environment, as has occurred in other organ systems.
Palabras clave:
middle ear
,
ossicles
,
aquatic mammals
,
phylogeny
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Citación
Loza, Cleopatra Mara; Rutimann, Oliver; Sanchez Villagra, Marcelo R.; Carlini, Alfredo Armando; Aguirre Fernández, Gabriel; Evolutionary transformations of the malleus in pinnipeds, with emphasis on Southern Hemisphere taxa; University of Amsterdam; Contributions To Zoology; 87; 2; 7-2018; 75-85
Compartir
Altmétricas