Artículo
Appearances are deceptive: a cryptic lineage within the assumed distributional boundaries of Ctenomys talarum (Rodentia, Ctenomyidae)
Austrich, Ailin
; Tomasco Introini, Ivanna Haydée; Mapelli, Fernando Javier
; Kittlein, Marcelo Javier
; Cutrera, Ana Paula
; Mora, Matias Sebastian
Fecha de publicación:
01/2023
Editorial:
Alliance Communications Group Division Allen Press
Revista:
Journal of Mammalogy
ISSN:
0022-2372
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The coastal dunes of the southeast of Buenos Aires province, Argentina, present two different described species of tuco-tucos: Ctenomys talarum and C. australis. Formerly, C. talarum was subdivided into three subspecies (C. t. talarum, C. t. recessus, and C. t. occidentalis), mainly based on its geographic distribution and phenotypic variation in characters of external morphology (e.g., body size and pelage color). This study assesses the phylogenetic relationships of C. talarum, focusing on the populations at the western end of its coastal distribution (localities of Pehuen-Có and Sauce Grande), which have been previously identified as highly genetically divergent. In this regard, populations distributed throughout the range of the species were sampled. Complete DNA sequences of the mitochondrial cytochrome b gene (1,140 bp), partial sequences of the mitochondrial D-loop region (426 bp), and partial sequences of the nuclear DNA intron 8 of the β-fibrinogen (about 870 bp) gene were used for the analyses. Phylogenetic inferences based on mitochondrial and nuclear markers were performed separately or combined to obtain a species tree. Populations distributed at the western end of the coastal dunes (between Pehuen-Có and Sauce Grande), previously assumed as C. talarum, were found to belong to an independent lineage relative to the other populations from the Pampas region. The average genetic distance between these two lineages is within the order of the genetic distances observed between different species of the genus. Also, our results show that this lineage of Ctenomys presents a high affinity with the magellanicus group, which is distributed further south, in Patagonia. In conclusion, tuco-tuco populations occurring in the coastal expanse between these two localities should be considered a possible distinct cryptic species, highly differentiated from C. talarum.
Palabras clave:
CTENOMYS TALARUM
,
MOLECULAR PHYLOGENY
,
PAMPAS REGION
,
SUBTERRANEAN RODENTS
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IIMYC)
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Articulos de INSTITUTO DE INVESTIGACIONES MARINAS Y COSTERAS
Articulos(MACNBR)
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Articulos de MUSEO ARG.DE CS.NAT "BERNARDINO RIVADAVIA"
Citación
Austrich, Ailin; Tomasco Introini, Ivanna Haydée; Mapelli, Fernando Javier; Kittlein, Marcelo Javier; Cutrera, Ana Paula; et al.; Appearances are deceptive: a cryptic lineage within the assumed distributional boundaries of Ctenomys talarum (Rodentia, Ctenomyidae); Alliance Communications Group Division Allen Press; Journal of Mammalogy; 104; 2; 1-2023; 372-386
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