Second record of holbrookia approximans (squamata: phrynosomatidae) for aguascalientes, mexico and highest altitude record Authors: Quintero-Díaz, Gustavo Ernesto, Pérez-Delgadillo, Ana Gisele, Carbajal-Márquez, Rubén Alonso

Crotalus aquilus Klauber, 1952 (Squamata: Viperidae), a new state record for Zacatecas, Mexico Authors: Carbajal-Márquez, Rubén Alonso, González-Saucedo, Zaira Yaneth, Arenas-Monroy, José Carlos

Heterospecific amplexus between Triprion petasatus (Anura: Hylidae) and Incilius valliceps (Anura: Bufonidae) from Yucatán, Mexico Authors: Carbajal-Márquez, Rubén Alonso, Ramírez-Valverde, Tania, Quintero-Díaz, Gustavo Ernesto, García-Balderas, Christian M., Cedeño-Vázquez, J. Rogelio