Symplectoscyphus flexilis (Hartlaub, 1900)

Synonyms in the area: Sertularella modesta Hartlaub, 1900 p. 42–43, 1905 p. 634–635 [polyp]; Sertularella tricuspidata —Naumov & Stepanjants 1962; Stepanjants 1979 [polyp]; Symplectoscyphus glacialis —Blanco 1967a [polyp]; Symplectoscyphus modestus —Blanco 1976a, 1976b [polyp].

Remarks: species recorded as Sertularella modesta in Tierra del Fuego by Hartlaub (1900, 1905), as Sertularella tricuspidata between Tierra del Fuego and Malvinas (Falkland) Islands by Naumov & Stepanjants (1962), as Symplectoscyphus glacialis in Puerto Madryn by Blanco (1967a), and as Symplectoscyphus modestus by Blanco (1976), without details of the collection site (off Buenos Aires) .

Distribution in South America: polyp—Pacific Ocean, Chile, at 29.22°S 71.55°W and at 39.95°S 73.61°W (Galea & Schories 2012a p. 48–50; Galea et al. 2014 p. 36); Atlantic Ocean, Argentina, from 40°S to 56°S (Hartlaub 1900 p. 42–43, 1905 p. 634–635; Naumov & Stepanjants 1962; Blanco 1967a, 1976a, 1976b, 1980, 1994a; Vervoort 1972; Stepanjants 1979; Genzano & Zamponi 1997; Seo 2003; Miranda et al. 2015).

Habitat: polyp—from 6 to 800m depth, on seaweed and sponge (Vervoort 1972; Blanco 1976a, 1976b, 1980, 1994a; Galea & Schories 2012a p. 48–50; Galea et al. 2014 p. 36).