TY - JOUR
T1 - A new species of arboreal rat, genus Oecomys (Rodentia, Cricetidae) from Chaco
AU - Pardiñas, Ulyses F.J.
AU - Teta, Pablo
AU - Salazar-Bravo, Jorge
AU - Myers, Phil
AU - Galliari, Carlos A.
N1 - Funding Information:
Acknowledgments Several colleagues shared with us (UFJP and CAG) the field efforts in order to capture specimens of Oecomys in Argentina: J. S?nchez, M. Lareschi, G. Panisse, M. del Rosario Robles, J. Barneche, and J. Torres. Fieldwork in Formosa was authorized by O. Mendoza (Direcci?n de Control y Fiscalizaci?n) and J. Soupet (Direcci?n Recursos Naturales y Gesti?n) and logistically supported in Guaycolec by S. Maciel. Curators D. Flores (MACN), Y. Davies and A. Giacchino (Fundaci?n F?lix de Azara), and J. Patton (MVZ) kindly allowed the study of specimens of Oecomys under their care. M. Carleton, J. Patton, and G. Musser provided measurements and sequences and shared with us their impressions and huge knowledge about the taxonomy of Oecomys. G. D'El?a provided the Cytb sequence of the MACN 26663. M. Lareschi and R. Robles provided parasitological data. S. Turvey, S. Brace, and E. Lessa attended our questions about Megalomys sequences. P. Cordeiro Estrela provided photographs from the holotype of O. mamorae. D. E. Udrizar Sauthier granted access to material from his private collection. C. L?pez Beltr?n sent her rich study about Luigi Balzan. Field and laboratory activities were supported by grants Agencia PICT 2010-0924 (to Graciela Navone) and 2008-547 and 2014-1039 (to UFJP). Funds from the American Philosophical Society, the Systematics Research Fund (Systematics Association) and the UMSA-ASDI program (Ref 75000553) to JS-B are acknowledged. We are deeply indebted to the above-mentioned persons and institutions. This is GEMA (Grupo de Estudios de Mam?feros Australes) contribution #17.
Publisher Copyright:
© 2016 American Society of Mammalogists.
PY - 2016/7/25
Y1 - 2016/7/25
N2 - A new species of rodent is added to the highly diverse genus Oecomys (Cricetidae, Sigmodontinae, Oryzomyini) based on specimens collected in the Argentinian provinces of Chaco and Formosa. The new species is characterized by a derived carotid circulatory pattern, a feature shared with O. concolor, O. mamorae, and O. sydandersoni. A unique combination of morphological, morphometric, and molecular characters, however, provides unambiguous evidence of its validity as a separate entity. Individuals of the new species are larger than other representatives of Oecomys, and their skulls have wide and cuneate interorbital regions with well-developed supraorbital shelves, long incisive foramina, long palates, absent alisphenoid struts, and broad Eustachian tubes. This new Oecomys appears to be endemic to the Humid Chaco, an ecoregion listed as Vulnerable due to the human impact. Preliminary observations suggest that several specimens from Eastern Paraguay and the Brazilian Pantanal could also be assigned to the new species described herein.
AB - A new species of rodent is added to the highly diverse genus Oecomys (Cricetidae, Sigmodontinae, Oryzomyini) based on specimens collected in the Argentinian provinces of Chaco and Formosa. The new species is characterized by a derived carotid circulatory pattern, a feature shared with O. concolor, O. mamorae, and O. sydandersoni. A unique combination of morphological, morphometric, and molecular characters, however, provides unambiguous evidence of its validity as a separate entity. Individuals of the new species are larger than other representatives of Oecomys, and their skulls have wide and cuneate interorbital regions with well-developed supraorbital shelves, long incisive foramina, long palates, absent alisphenoid struts, and broad Eustachian tubes. This new Oecomys appears to be endemic to the Humid Chaco, an ecoregion listed as Vulnerable due to the human impact. Preliminary observations suggest that several specimens from Eastern Paraguay and the Brazilian Pantanal could also be assigned to the new species described herein.
KW - Argentina
KW - Bolivia
KW - Brazil
KW - Oecomys mamorae
KW - Oryzomyini
UR - http://www.scopus.com/inward/record.url?scp=84982986790&partnerID=8YFLogxK
U2 - 10.1093/jmammal/gyw070
DO - 10.1093/jmammal/gyw070
M3 - Article
AN - SCOPUS:84982986790
VL - 97
SP - 1177
EP - 1196
JO - Journal of Mammalogy
JF - Journal of Mammalogy
SN - 0022-2372
IS - 4
ER -