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Abstract:

The genus Reigechimys (Rodentia, Echimyidae) was originally described on the basis of two mandibular fragments recovered from Huayquerian (late Miocene) outcrops of the Cerro Azul Formation in La Pampa Province (Argentina). The included species (R. plesiodon Verzi et al. and R octodontifirmis Verzi et al.) represent a peculiar lineage characterized by its molar morphology with occlusal simplification that is extreme for the family. New materials recently found at the Cerro Azul Formation allow for a more detailed knowledge of the variation of Reigechimys and recognition of a new species, Reigechimys simplex sp. nov. characterized by the absence of mesoflexid/fossettid in the m1-2. The morphological changes of Reigechimys are described in the context of the turnover exhibited by octodontoid rodents in the Huayquerian of the Cerro Azul Formation. The polarity of changes described for Reigechimys is consistent with those of the other lineages. This evolutionary pattern enhances the biochronological interpretation of the Huayquerian in this formation.

Registro:

Documento: Artículo
Título:A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage
Autor:Sostillo, R.; Montalvo, C.I.; Verzp, D.H.
Filiación:INCITAP, CONICET, Univcrsidad Nacional de la Pampa, Av. Uruguay 151, Santa Rosa, La Pampa, Argentina
Facultad de Ciencias Exactas y Naturales, Univcrsidad Nacional de la Pampa, Av. Uruguay 151, Santa Rosa, La Pampa, Argentina
Conscjo Nacional de Investigaciones Científicas y Técnicas, Sección Mastozoología, Museo de la Plata, Pasco del Bosque s/n, La Plata, Buenos Aires, Argentina
Palabras clave:Argentina; Echimyidae; Late miocene; Reigechimys; Rodentia; biochronology; evolutionary biology; Miocene; new species; outcrop; rodent; species diversity; Argentina; Cerro Azul; Ecuador; Galapagos Islands; Isabela [Galapagos Islands]; Echimyidae; Rodentia
Año:2014
Volumen:51
Número:4
Página de inicio:284
Página de fin:294
DOI: http://dx.doi.org/10.5710/AMGH.24.04.2014.2718
Título revista:Ameghiniana
Título revista abreviado:Ameghiniana
ISSN:00027014
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00027014_v51_n4_p284_Sostillo

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Citas:

---------- APA ----------
Sostillo, R., Montalvo, C.I. & Verzp, D.H. (2014) . A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage. Ameghiniana, 51(4), 284-294.
http://dx.doi.org/10.5710/AMGH.24.04.2014.2718
---------- CHICAGO ----------
Sostillo, R., Montalvo, C.I., Verzp, D.H. "A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage" . Ameghiniana 51, no. 4 (2014) : 284-294.
http://dx.doi.org/10.5710/AMGH.24.04.2014.2718
---------- MLA ----------
Sostillo, R., Montalvo, C.I., Verzp, D.H. "A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage" . Ameghiniana, vol. 51, no. 4, 2014, pp. 284-294.
http://dx.doi.org/10.5710/AMGH.24.04.2014.2718
---------- VANCOUVER ----------
Sostillo, R., Montalvo, C.I., Verzp, D.H. A new species of Reigechimys (Rodentia, Echimyidae) from the late Miocene of Central Argentina and the evolutionary pattern of the lineage. Ameghiniana. 2014;51(4):284-294.
http://dx.doi.org/10.5710/AMGH.24.04.2014.2718