Genus Tetranema Fraser, 1937a

Tetranema Fraser, 1937a: 193 [invalid junior homonym of Tetranema Haeckel, 1879 (Hydrozoa)].

Astrolabia Naumov, 1955: 22 .

Type species. Tetranema furcata Fraser, 1937a, by monotypy.

Current status. Invalid.

Remarks. The name Tetranema Fraser, 1937a is an invalid junior homonym of Tetranema Haeckel, 1879: 125 (Hydrozoa) . It has been replaced by a synonym, Astrolabia Naumov, 1955 (Calder 1997; Schuchert 1997; Antsulevich 2015; WoRMS).