J.  Meisenheimer, ?Pteropoda?, Tiefsee Exp. 1898-1899, vol. 4, p. 314, 1905.

J. J.  Tesch, ?Vorläufige Mitteilung über die Thecosomata und Gymnosomata der Siboga-Expedition?, Tijdsch. Nederl. Dierk., vol. 2, p. 117, 1903.

S.  Van Der Spoel, Pseudothecosomata, gymnosomata and heteropoda (gastropoda). Amsterdam: Bohn, Scheltema & Holkeme Utrecht, 1976, p. 484.

K.  Bonnevie, ?Pteropoda from the Michael Sars North-Atlantic Deep-Sea expedition?, ?Michael Sars? North Atl, vol. 3, p. 69, 1913.