Oryzomys alfari (J. A. Allen, 1897). Bull. Am. Mus. Nat. Hist., 9:39. TYPE LOCALITY: Costa Rica, Limon, Jimenez, 700 ft. (213 m). DISTRIBUTION: E. Honduras to Panama to N. Ecuador and W. Venezuela. COMMENT: Formerly included in Nectomys; Gardner and Patton, 1976, Occas. Pap. Mus. Zool. La. St. Univ., 49:16- 17, placed alfari in Oryzomys (Sigmodontomys). Corbet and Hill, 1980: 144, included alfari in russulus, without comment. Hall, 1981:623, considered alfari a distinct species. Includes russulus; see Cabrera, 1961:418, and Hershkovitz, 1970, J. Mammal., 51:791. ISIS NUMBER: 5301410008025001001 as Nectomys alfari.

{"references": ["Gardner, A. L., and J. L. Patton. 1976. Karyotypic variation in oryzomyine rodents (Cricetinae) with comments on chromosomal evolution in the Neotropical cricetine complex. Occasional Papers of the Museum of Zoology, Louisiana State University, 49: 1 - 48.", "Corbet, G. B., and J. E. Hill. 1980. A world list of mammalian species. British Museum (Natural History), London, 226 pp.", "Hall, E. R. 1981. The mammals of North America. Second ed. John Wiley and Sons, New York, 1: 1 - 600 + 90, 2: 601 - 1181 + 90."]}

Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Rodentia (Part 3), pp. 392-476 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 436, DOI: 10.5281/zenodo.7353031