First issued in release COL20.12.
Last used in release COL23.1
Published in
Janssens, A. (1940). Monographie des Gymnopleurides. Verhandelingen Koninklijk Natuurhistorisch Museum Belgie. Brussel 2(18):1-74. http://biblio.naturalsciences.be/rbins-publications/memoirs-of-the-royal-institute-of-natural-sciences-of-belgium-second-series/18-1940/vol-18-0251d5x-text.pdf