Triphoris gracilis Pease, 1871

Triphoris gracilis Pease, 1871: 774 .

Triforis gracilis Pease, 1871 — Tryon 1887: 191.

Mastonia gracilis (Pease, 1871) — Kay 1979: 138, fig. 49i.

Type locality. Hawaii, Kauai Island .

Type material. MCZ 50058, lectotype . MCZ 298493, paralectotype .

Distribution. China Sea (Zongguo & Mao 2012), Hawaii (Pease 1871; Tryon 1887; Kay 1979; Hemmes & Goldsmith 1986; Johnson 1994; Hemmes et al. 1996b; Chang & Wu 2005; Severns 2011; Polhemus 2020), Japan (Chang & Wu 2005), Strait of Malacca (Chang & Wu 2005), Taiwan (Chang & Wu 2005; Chang 2006d).

Remarks. Lectotype designation by Johnson (1994).