Cr. Bonvicino et M. Weksler, A NEW SPECIES OF OLIGORYZOMYS (RODENTIA, SIGMODONTINAE) FROM NORTHEASTERN AND CENTRAL BRAZIL, Zeitschrift fur Saugetierkunde, 63(2), 1998, pp. 90-103
A new Oligoryzomys species from Central and Northeastern regions of Br
azil, Oligoryzomys stramineus sp. n., is described based on morphologi
c, biogeographic, and karyotypic analyses. A comparison with other Oli
goryzomys species resulted in the distinction of two species groups: o
ne comprising large-sized species with a white ventral surface (O. cha
coensis, O. nigripes, O. delticola, and O. stramineus sp. n.) and anot
her, comprising small-sized species with a yellow ventral surface (O.
fornesi, O. microtis, and O. flavescens).