Etmopterus joungi Knuckey, Ebert & Burgess, 2011

Type locality: Da-xi, Taiwan.

The three Taiwanese samples of E. joungi formed a single cluster together with E. pusillus samples from Australia and Portugal. Specimens of E. pusillus included in Naylor et al. (2012a, 2012b) indicate haplotypes that are geographically widespread across the world’s oceans. A revision of this species is required to ascertain whether E. joungi is a western North Pacific sub-population of E. pusillus, and thus a junior synonym of E. pusillus, or whether it is a distinct species (Figure 2, Supplementary Material 1).