Artículo
An exceptionally well-preserved fossil rodent of the South American subterranean clade Ctenomys (Rodentia, Ctenomyidae). Phylogeny and adaptive profile
de Santi, Nahuel Antu
; Olivares, Adriana Itati
; Piñero, Pedro; Fernández, José Ariel
; Verzi, Diego Hector




Fecha de publicación:
09/2024
Editorial:
Springer
Revista:
Journal of Mammalian Evolution
ISSN:
1064-7554
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Ctenomys, the only living Ctenomyidae, is the most diverse genus of hystricomorph rodents. Here, a new extinct species from the Middle Pleistocene of central Argentina is described. It is represented by the most complete skeleton for an extinct Ctenomys species. We analyze its remains and phylogenetic position in the context of other extinct and living Ctenomys species. Additionally, we present an updated and exhaustive timetree of the genus, and include the new species into a matrix of variables with morphofunctional significance. In the parsimony phylogenetic analysis, †C. uquiensis, †C. chapalmalensis, †C. rusconii, and †C. thomasi were placed at the base of the Ctenomys total clade, while †Ctenomys sp. nov. was the sister species of the crown group. Within the crown Ctenomys, a polytomy was obtained in the basal node formed by †C. dasseni,†C. kraglievichi, the clade †C. viarapaensis-C. osvaldoreigi, the frater species group, and the major clade consisting of the remaining eight species groups. The Bayesian tipdating analysis provided divergence estimates of 4.3 and 1.8 Ma for the origin of the genus and the crown clade, respectively. In the adaptive morphospace, the new species was located in the quadrant of lower scratch- and tooth-digger specialization, close to C. pulcer, a species currently distributed in semi-fixed dunes, pointing to the requirement of similar soil conditions. Finally, the new species co-occurs with †C. kraglievichi, a crown-group member with pronounced tooth-digging specialization, suggesting that Ctenomys experienced both significant cladogenesis and substantial eco-morphological diversification during the Middle Pleistocene.
Palabras clave:
GEOMETRIC MORPHOMETRICS
,
MIDDLE PLEISTOCENE
,
PHYLOGENY
,
RODENTS
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
de Santi, Nahuel Antu; Olivares, Adriana Itati; Piñero, Pedro; Fernández, José Ariel; Verzi, Diego Hector; An exceptionally well-preserved fossil rodent of the South American subterranean clade Ctenomys (Rodentia, Ctenomyidae). Phylogeny and adaptive profile; Springer; Journal of Mammalian Evolution; 31; 3; 9-2024; 1-27
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