New records and range extension of Trimorphodon tau Cope, 1869 (Squamata, Colubridae) in Nuevo León, México

The distribution of Trimorphodon tau Cope, 1869 in Nuevo León, Mexico, is understood on the basis of only a few records from the municipality of Iturbide and the central portion in the municipality of Monterrey, both in the southern portion of the state. The most recent record was reported in 2020. We provide new information on specimens from the collection of the Universidad Autónoma de Nuevo León and photographic vouchers, which extend the known geographic range of this species to the northern portion of the state. We also review the scutellation in the new specimens and other specimens cited in the literature.