From editor or global species database
Synonymy Rehder (1980: 27-28) regards this as a subspecies of Zebina tridentata (Michaud) from Hawaii and Easter Island: "I had first considered Zebina crassilabrum
(Garrett, 1857) to be a synonym of Z. tridentata
(Michaud, 1830), but the rather obvious smaller
size and more slender outline of the form from Hawaii
and Easter Island and the separated geographical
ranges of the two subspecies have lead me to consider
them to be subspecifically distinct. Typical Zebina
tridentata is found from the western Indian Ocean to
southern Japan and Samoa and Tonga. This species
is unknown from Micronesia and Polynesia." Rehder, 1980: 28) [details]