A new facetotectan species, described herein as Hansenocaris spiridonovi Kolbasov, Savchenko et Høeg sp.n. and based on its cypridiform stage, was found in the plankton off Azores Islands. We employed scanning electron microscopy to document the fine-scale external morphology of this species. We discuss the findings of facetotectan larvae showing cosmopolitan distribution of these crustaceans. The presence of Y-cyprid exuviae in plankton, findings of y-larvae in the deep sea plankton, occurrence in the oceanic plankton, as well as their permanent presence in the tropical waters may evidence on a pelagic host.