Peromyscus pectoralis

Peromyscus pectoralis was split into two species in 2015 by Bradley et al.: "Sequence-based phylogenetics supported by allozyme variation and multivariate analyses of morphologic data form the basis for recognizing Peromyscus laceianus as a separate and presumably cryptic species from the Mexican populations of P. pectoralis".

Range of Peromyscus pectoralis

References

Bradley, R. D., Schmidly, D. J., Amman, B. R., Platt, R. N., Neumann, K. M., Huynh, H. M., ... & Ordóñez-Garza, N. (2015). Molecular and morphologic data reveal multiple species in Peromyscus pectoralis. Journal of Mammalogy, 96(2), 446-459.