Photographs of species of the Sibon nebulatus leucomelas complex in life a S. leucomelas from Morromico Reserve, Chocó department, Colombia b S. vieirai sp. nov. ZSFQ 5073 from Hacienda Cerro Chico, Los Ríos province, Ecuador c S. vieirai sp. nov. from Tundaloma Lodge, Esmeraldas Province, Ecuador d S. vieirai sp. nov. holotype ZSFQ 5071 from Tundaloma Lodge, Esmeraldas Province, Ecuador.

 
 
  Part of: Arteaga A, Batista A (2023) A consolidated phylogeny of snail-eating snakes (Serpentes, Dipsadini), with the description of five new species from Colombia, Ecuador, and Panama. ZooKeys 1143: 1-49. https://doi.org/10.3897/zookeys.1143.93601