In identifying some fish species from a recent pacific trip, I ran into this conundrum. Is Monotaxis heterodon a valid species or is it just a synonym for Monotaxis grandoculis? In one of my guides, "Micronesian Reef Fishes" by Myers it says the Monotaxis genus is monotypic....however in "Reef Fish Identification: Tropical Pacific" I get both M.grandoculis and M.heterodon. In looking online I find nothing definitive...if someone could help, that would be great!
And also if they are indeed two separate species, how to differentiate between the two...thank you!!