Miscellany on Bibimys (Rodentia, Sigmodontinae), a unique akodontine cricetid
Miscellany on Bibimys (Rodentia, Sigmodontinae), a unique akodontine cricetid
Comentamos sobre la distribución geográfica de las 3 especies reconocidas de Bibimys, con énfasis en la especie tipo, B. torresi. Revisando brevemente su registro fósil postulamos que dicha especie sufrió una marcada retracción reciente. Sobre la base de unos pocos individuos colectados pertenecientes a B. chacoensis y B. torresi, describimos algunos rasgos externos como la dotación mamaria compuesta por 2 pares localizados más atrás en el cuerpo, 1 de ellos lateralmente a la genitalia. Combinando morfología con observaciones directas de un individuo en libertad postulamos que Bibimys no es una forma fosorial o semifosorial sino un sigmodontino especializado en la búsqueda activa de alimento empleando mayormente la nariz.
We comment on the geographical distribution of the 3 recognized species of Bibimys, focusing in the type species, B. torresi. By briefly reviewing the fossil occurrence of this form we posit that the species suffered a very recent marked retraction. Based on few collected individuals belonging to B. chacoensis and B. torresi, we describe some external traits, such as their unique mammary dotation composed by 2 pairs located more caudally, 1 of them laterally to the genitalia. Combining morphology with direct observation of a wild individual we advance that Bibimys is not a fossorial or semi-fossorial form but a specialized sigmodontine focused on the active search for food employing mostly the nose.
Fil: Galliari, Carlos Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Estudios Parasitológicos y de Vectores. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Estudios Parasitológicos y de Vectores; Argentina
Fil: Pardiñas, Ulises Francisco J.. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Diversidad y Evolución Austral; Argentina
Fil: Voglino, Damián. Museo de Ciencias Naturales Antonio Scasso; Argentina
- National University of La Plata Argentina
- National Scientific and Technical Research Council Argentina
Bibimys torresi, anatomy, Holocene, Distribución, Bibimys chacoensis, distribución, Distribution, Akodontini, https://purl.org/becyt/ford/1.6, anatomía, distribution, Ciencias Naturales, Holoceno, Anatomy, https://purl.org/becyt/ford/1, Anatomía
Bibimys torresi, anatomy, Holocene, Distribución, Bibimys chacoensis, distribución, Distribution, Akodontini, https://purl.org/becyt/ford/1.6, anatomía, distribution, Ciencias Naturales, Holoceno, Anatomy, https://purl.org/becyt/ford/1, Anatomía
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