Distribution extension of Syphacia (Seuratoxyuris) peromysci Harkema, 1936 (Nematoda, Syphaciinae) parasitizing the Rock Mouse, Peromyscus difficilis (J. A. Allen, 1891) (Rodentia, Neotominae) in central Mexico

As a part of an ongoing project in order to inventory the helminth parasites of rodents in Mexico, 49 individuals of Syphacia (Seuratoxyuris) peromysci were collected from five specimens of the Rock Mouse Peromyscus difficilis caught in Veracruz state, Mexico. This is the first report of S. peromysci in a Mexican endemic rodent, widening the known distribution of the species to the southern portion of the country.