Baiomys taylori

The northern pygmy mouse (Baiomys taylori) is a species of rodent in the family Cricetidae. It is known as ratón-pigmeo norteño in the Spanish-speaking areas of its range. It is found in Mexico and the United States. Parasites of the northern pygmy mouse include the intestinal nematode Pterygodermatites baiomydis.