Comparisons of the colors of iris, the colors of inside of mouth, and the precloacal plates. A, C, and E the holotype (KIZ2019028) of Gonyosoma coeruleum sp. nov. B, D, and F the specimen (SEABRI2019120043) of G. prasinum.

  Part of: Liu S, Hou M, Lwin YH, Wang Q, Rao D (2021) A new species of Gonyosoma Wagler, 1828 (Serpentes, Colubridae), previously confused with G. prasinum (Blyth, 1854). Evolutionary Systematics 5(1): 129-139.