TY - JOUR
T1 - Phylogeny and evolution of the neotropical rodent genus Calomys
T2 - Inferences from mitochondrial DNA sequence data
AU - Salazar-Bravo, Jorge
AU - Dragoo, Jerry W.
AU - Tinnin, David S.
AU - Yates, Terry L.
N1 - Funding Information:
We acknowledge the help of the following people and organizations for collecting and/or kindly providing material for this study: M. A. Mares and Janet K. Braun (Sam Noble Oklahoma Museum of Natural History), Sydney Anderson (American Museum of Natural History), Teresa Tarifa and Nuria Bernal (Colección Boliviana de Fauna), Robert J. Baker and Sergio Tiranti (Texas Tech University), Bruce Patterson and Bill Standley (Field Museum of Natural History), James N. Mills (CDC-P, Atlanta), Sergio Saba (Centro Nacio-nal Patagónico, Argentina), Orlando Scaglia (Musco Municpal de Mar del Plata), and Angela Martino (Universidad Francisco de Miranda). The following people read and helped improve earlier versions of the manuscript: Michael A. Bogan, Angela Martino, Uly-ses Pardiñas, Timothy K. Lowrey, Luis A. Ruedas, and Joseph A. Cook. Specimens from Bolivia were obtained through Grants BSR 9015454, BSR 89200617, and INT 9212839 from the National Science Foundation (NSF) to Dr. Terry L. Yates. Funding for field research in Argentina was provided by grants from the National Science Foundation (BSR-8906665) and the National Geographic Society (4820-92) to M. A. Mares. Laboratory work was funded by NIH (grant 5-P01-AI39780).
PY - 2001
Y1 - 2001
N2 - Field mice of the genus Calomys are small, mostly granivorous rodents common to several habitats in South America. To date, phylogenies for the genus have been proposed on the basis of morphological, chromosomal, and biochemical data, often with contradictory results due to incomplete species sampling or methodological shortcomings. In this paper, we propose relationships among 10 species of Calomys based on the complete cytochrome b gene sequence. Our analyses show that Calomys is constituted by two major clades, one mostly associated with mountain habitats with subsequent invasions to lowland habitats and another with species restricted to lowland habitats both north and south of the Amazon basin. The evolution of the genus was likely accompanied by a reduction of chromosome diploid numbers that occurred independently in each of the two evolutionary lineages. A "clock" calibrated on the split between Auliscomys and Loxodontomys suggests that the almost nonexistent fossil record for the genus greatly underestimates divergence times among its species.
AB - Field mice of the genus Calomys are small, mostly granivorous rodents common to several habitats in South America. To date, phylogenies for the genus have been proposed on the basis of morphological, chromosomal, and biochemical data, often with contradictory results due to incomplete species sampling or methodological shortcomings. In this paper, we propose relationships among 10 species of Calomys based on the complete cytochrome b gene sequence. Our analyses show that Calomys is constituted by two major clades, one mostly associated with mountain habitats with subsequent invasions to lowland habitats and another with species restricted to lowland habitats both north and south of the Amazon basin. The evolution of the genus was likely accompanied by a reduction of chromosome diploid numbers that occurred independently in each of the two evolutionary lineages. A "clock" calibrated on the split between Auliscomys and Loxodontomys suggests that the almost nonexistent fossil record for the genus greatly underestimates divergence times among its species.
UR - http://www.scopus.com/inward/record.url?scp=0034903018&partnerID=8YFLogxK
U2 - 10.1006/mpev.2001.0965
DO - 10.1006/mpev.2001.0965
M3 - Article
C2 - 11476627
AN - SCOPUS:0034903018
SN - 1055-7903
VL - 20
SP - 173
EP - 184
JO - Molecular Phylogenetics and Evolution
JF - Molecular Phylogenetics and Evolution
IS - 2
ER -