Differences in head morphology between species of Sibon previously subsumed under S. annulatus a S. annulatus MHCH 1982 from Bonyic, Bocas del Toro province, Panama b S. canopy sp. nov. holotype MHCH 3110 from Cerro Gaital, Coclé province, Panama c S. irmelindicaprioae sp. nov. MHCH 3120 from Pirré, Darién province, Panama d S. marleyae sp. nov. holotype ZSFQ 5065 from Verdecanandé, 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