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GENUS Zygodontomys

Author:J. A. Allen, 1897.
Citation:Bull. Am. Mus. Nat. Hist., 9: 38.
Type Species:Oryzomys cherriei J. A. Allen, 1895 (= Oryzomys brevicauda J. A. Allen and Chapman, 1893).
Comments:Oryzomyini. Zygodontomys was considered a member of the phyllotine group by Hershkovitz (1962), an affinity disputed by others (Hooper and Musser, 1964a; Olds and Anderson, 1989; Pearson and Patton, 1976), or as Sigmodontinae incertae sedis (Reig, 1984; Voss, 1991a). Classification in Oryzomyini formally proposed by Voss and Carleton (1993), a tribal relationship supported by Steppan (1995) and Bonvicino et al. (2003d). First revised by Hershkovitz (1962), who included South American populations now allocated to Bolomys (= Necromys) lasiurus (see Maia and Langguth, 1981; Reig, 1987; Voss and Linzey, 1981). Generic definition emended and species taxonomy revised by Voss (1991a), as followed here; in addition to the two species that Voss recognized, Reig (in Reig et al., 1990a) considered microtinus as valid, a possibility that deserves further exploration. Karyology reported by Gardner and Patton (1976, Costa Rica and Colombia), Reig et al. (1990a, Venezuela), and Mattevi et al. (2002, Brazil); all karyotypes summarized as well as new variants reported by Bonvicino et al. (2003d).
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SPECIES brevicauda

SPECIES brunneus


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