Microtus breweri (Baird, 1858). Mammals, in Repts. Expl. Surv...., 8(1):525. REVIEWED BY: R. H. Tamarin (RHT). TYPE LOCALITY: U.S.A., Massachusetts, Muskeget Isl. DISTRIBUTION: Muskeget Isl. (Massachusetts, U.S.A.). COMMENT: Subgenus Microtus; related to pennsylvanicus of the adjacent mainland; treated as a full species in a review by Tamarin and Kunz, 1974, Mamm. Species, 45:1-3, but may be conspecific; see Fivush et al., 1975, J. Mammal., 56:272-273.

Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Rodentia (Part 4), pp. 477-504 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc. & The Association of Systematics Collections on page 490, DOI: 10.5281/zenodo.7353034

{"references": ["Tamarin, R. H., and T. H. Kunz. 1974. Microtus breweri. Mammalian Species, 45: 1 - 3.", "Fivush, B., R. Parker, and R. H. Tamarin. 1975. Karyotype of the beach vole, Microtus breweri, an endemic island species. Journal of Mammalogy, 56: 272 - 273."]}