Amphinectomys Malygin 1994

Wilson, Don E. & Reeder, DeeAnn, 2005, Order Rodentia - Family Cricetidae, Mammal Species of the World: a Taxonomic and Geographic Reference (3 rd Edition), Volume 2, Baltimore: The Johns Hopkins University Press, pp. 955-1189 : 1100

Amphinectomys Malygin 1994

Amphinectomys Malygin 1994 , Zool. Zh., 73: 198.

Type Species: Amphinectomys savamis Malygin 1994

Species and subspecies: 1 species:

Species Amphinectomys savamis Malygin 1994

Discussion: Oryzomyini . A water rat morphologically similar to Nectomys but with more expansive interdigital webbing and broader interorbital region ( Malygin et al., 1994). The new genus was differentially diagnosed with respect to nearby populations of Nectomys squamipes sensu Hershkovitz (1944) , now well known to be a heterogeneous composite (see below); the relationship and generic status of savamis should be confirmed within a broader sampling of Nectomys species and other oryzomyines. The karyotype (2n = 52; Malygin et al., 1994) fits within the range of variation documented for species of Nectomys (2n = 38-59; e.g., Andrades-Miranda et al., 2001 b), but critical banding comparisons are needed; genetically closely related to Nectomys squamipes based on nuclear gene ( IRBP) sequences ( Weksler, 2003). Anatomy of male reproductive tract reported by Malygin and Rosmiarek (1997) and compared with other oryzomyines.