Anal-fins of Tlaloc hildebrandi (male: A–B) and Profundulus punctatus (female: C–D). Arrows indicate the spicules. B and D = anal fin rays (cleared).

 
 
  Part of: Velázquez-Velázquez E, Domínguez-Cisneros SE, Anzueto-Calvo MJ, Maza-Cruz MF (2022) Occurrence of contact organs and sexual dimorphism in fishes of the family Profundulidae (Actinopterygii: Cyprinodontiformes). Acta Ichthyologica et Piscatoria 52(4): 261-265. https://doi.org/10.3897/aiep.52.93669