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HOME --> CLASS MAMMALIA
--> ORDER RODENTIA
--> SUBORDER MYOMORPHA
--> SUPERFAMILY Muroidea
--> FAMILY Cricetidae
--> SUBFAMILY Sigmodontinae
--> GENUS Scapteromys
SPECIES Scapteromys aquaticus
| Author: | Thomas, 1920. | | Citation: | Ann. Mag. Nat. Hist., ser. 9, 5: 477. | | Common Name: | Argentine Swamp Rat | | Type Locality: | Argentina, Buenos Aires Prov., Isla Ella. | | Distribution: | EC Argentina and E Paraguay. | | Comments: | Retained as a species (e.g., Cabrera, 1961; Gyldenstolpe, 1932) until Massoia and Fornes (1964) realigned aquaticus as a subspecies of S. tumidus, a reallocation commonly observed in later systematic works (Corbet and Hill, 1991; Hershkovitz, 1966c; Honacki et al., 1982; Musser and Carleton, 1993). Karyotypic differences consistently disclosed between aquaticus (2n = 32) and tumidus (2n = 24) have persuaded others to retain the two as distinct species (Brum et al., 1973; Brum-Zorilla et al., 1986; Gardner and Patton, 1976; Gentile de Fronza, 1970), and they are represented as genetically separable in phylogenetic studies of cytochrome b data (D’Elía et al., 2003, in press). |
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