Steno bredanensis (G. Cuvier in Lesson, 1828)—Rough-toothed Dolphin

Delphinus bredanensis G. Cuvier in Lesson, 1828 p.206; Type locality- Coast of France.

D. rostratus Desmarest, 1817 p.160 (not valid by Miller, 1924 see p.508).

Steno rostratus Gray, 1846 p.43; Type locality- North Sea; Miller, 1924 p.508; Kuroda, 1938 p.17.

S. bredanensis: Kim et al., 2000 p.106; Kim, 2004 p.249.

Range: The range of S. bredanensis reaches the South Sea of Korea (Fig. 98). A few vagrant individuals have stranded on Jeju Island and Busan (Kim 2004).

Remarks: Kuroda (1938) named this species in Korea as S. rostratus, but the latter was synonymized into S. bredanensis (Watkins et al. 1987) . A controversy arose over whether Steno should be grouped with Orcaella or Sotalia (Caballero et al. 2008, McGowen et al. 2009, Steeman et al. 2009). Recent DNA investigations failed to confirm all of the revisions suggested by LeDuc et al. (1999) and did not produce consistent estimates of phylogenetic relationships within the family (LeDuc et al. 1999; Caballero et al. 2008). Traditionally, based on morphological similarity, the Genus Steno was placed in the Subfamily Stenoninae with the Genera Sousa, and Sotalia (Perrin 1989, Vilstrup et al. 2011). Steno bredanensis is currently considered a monotypic taxon.