Mesocricetus is a genus of Old Worldhamsters, including the Syrian or golden hamster, the first hamster to be introduced as a domestic pet, and still the most popular species of hamster for that purpose.
Recent research has shown that, unlike almost all other land mammals studied, all species of this genus lack the capacity for color vision.[2]
^Williams, Gary A. (2008). "Absence of functional short-wavelength sensitive cone pigments in hamsters (Mesocricetus)". Journal of Comparative Physiology A. 194: 429–439. doi:10.1007/s00359-008-0316-4.
Williams, G. A.; Jacobs, G. H. (2008). "Absence of functional short-wavelength sensitive cone pigments in hamsters (Mesocricetus)". Journal of Comparative Physiology A. doi:10.1007/s00359-008-0316-4.