Trimorphodon vilkinsonii

Lazcano, David, Nevárez-de, Manuel, García-Padilla, Elí, Johnson, Jerry D., Mata-Silva, Vicente, DeSantis, Dominic L. & Wilson, Larry David, 2019, The herpetofauna of Coahuila, Mexico: composition, distribution, and conservation status, Amphibian & Reptile Conservation (e 189) 13 (2), pp. 31-94 : 46

Trimorphodon vilkinsonii . Baeza-Tarín et al. (2018c) first reported this species for Coahuila.

Crotalus ornatus . Anderson and Greenbaum (2012) resurrected Crotalus ornatus from the synonymy of C. molossus . Crotalus ornatus is found in most parts of Coahuila, whereas C. molossus is restricted to the extreme southern parts of the state.

Apalone atra . Apalone atra has been either regarded as a subspecies of A. spinifera or as a species endemic to the Valley of Cuatro Ciénegas, where A. spinifera has gained access to some areas through irrigation channels, thereby allowing some genetic introgression to take place, and driving A. atra to a level of being critically susceptible to extinction. Smith and Smith (1979) had already considered A. atra to be extinct. Recently, however, pure individuals of A. atra have been found, as well as hybrids between the two species ( Cerdá-Ardura et al. 2008). See Wilson and Johnson (2010) for a discussion on this issue. Until updated data indicate otherwise, we regard A. atra as having viable populations in the Valley of Cuatro Ciénegas, highlighting its need for conservation assessment and action.