Gaetanus Giesbrecht, 1888 (additional source)
Gaetanus antarcticus Wolfenden, 1905 accepted as Gaetanus kruppii Giesbrecht, in Lo Bianco, 1903 (source of synonymy)
Gaetanus armiger Giesbrecht, 1888 (additional source)
Gaetanus brachyurus Sars G.O., 1907 (additional source)
Gaetanus brevicaudatus Wolfenden, 1911 accepted as Gaetanus wolfendeni Park, 1975 accepted as Gaetanus antarcticus Wolfenden, 1905 accepted as Gaetanus kruppii Giesbrecht, in Lo Bianco, 1903 (source of synonymy)
Gaetanus miles Giesbrecht, 1888 (additional source)
Gaetanus minor Farran, 1905 (additional source)
Gaetanus minutus (Sars G.O., 1907) (additional source)
Gaetanus pileatus Farran, 1903 (additional source)
Gaetanus tenuispinus (Sars G.O., 1900) (additional source)
Gaetanus wolfendeni Park, 1975 accepted as Gaetanus antarcticus Wolfenden, 1905 accepted as Gaetanus kruppii Giesbrecht, in Lo Bianco, 1903 (original description)
Gaidius Giesbrecht, 1895 accepted as Gaetanus Giesbrecht, 1888 (additional source)
Gaidius Giesbrecht, 1895 accepted as Gaetanus Giesbrecht, 1888 (source of synonymy)
Gaidius affinis Sars G.O., 1905 accepted as Gaetanus affinis (Sars G.O., 1905) accepted as Gaetanus brevispinus (Sars G.O., 1900) (source of synonymy)
Gaidius brevicaudatus Sars G.O., 1907 accepted as Gaetanus brevicaudatus (Sars G.O., 1907) (source of synonymy)
Gaidius brevispinus (Sars G.O., 1900) accepted as Gaetanus brevispinus (Sars G.O., 1900) (source of synonymy)
Gaidius inermis (Sars G.O., 1905) accepted as Gaetanus inermis Sars G.O., 1905 (source of synonymy)
Gaidius minutus Sars G.O., 1907 accepted as Gaetanus minutus (Sars G.O., 1907) (source of synonymy)
Gaidius pungens Giesbrecht, 1895 accepted as Gaetanus pungens (Giesbrecht, 1895) (source of synonymy)
Gaidius robustus (Sars G.O., 1905) accepted as Gaetanus robustus Sars G.O., 1905 (source of synonymy)
Gaidius tenuispinus (Sars G.O., 1900) accepted as Gaetanus tenuispinus (Sars G.O., 1900) (source of synonymy)