Similar looking but not closely related snail-suckers from southern Mexico. Sibon nebulatus from Municipio de Ixtlahuacán, Colima (A); Sibon nebulatus from Municipio de Las Margaritas, Chiapas (B); Tropidodipsas fischeri from Municipio de Rayón, Chiapas (C); Tropidodipsas fischeri from Municipio de Unión Juárez, Chiapas (D).

 
 
  Part of: Grünwald CI, Toribio-Jiménez S, Montaño-Ruvalcaba C, Franz-Chávez H, Peñaloza-Montaño MA, Barrera-Nava EY, Jones JM, Rodriguez CM, Hughes IM, Strickland JL, Reyes-Velasco J (2021) Two new species of snail-eating snakes of the genus Tropidodipsas (Serpentes, Dipsadidae) from southern Mexico, with notes on related species. Herpetozoa 34: 233-257. https://doi.org/10.3897/herpetozoa.34.e69176