1. Species Adelactaeon amoenus (A. Adams, 1853) accepted as Monotygma amoena (A. Adams, 1853) (unaccepted > superseded combination)
2. Species Adelactaeon fulvus (A. Adams, 1853) accepted as Monotigma fulva (A. Adams, 1853) accepted as Monotygma fulva (A. Adams, 1853)

marine

Cossmann, M. (1895). Essais de paléoconchologie comparée. Première livraison. Paris, The author and Comptoir Géologique. 159 pp., 7 pls., available online at http://biodiversitylibrary.org/page/36852875
page(s): 54 [details] 

MolluscaBase eds. (2021). MolluscaBase. Adelactaeon Cossmann, 1895. Accessed through: Rius, M.; Ahyong, S.; Costello, M. J.; Galil, B. S.; Gollasch, S.; Hutchings, P.; Katsanevakis, S.; Lejeusne, C.; Marchini, A.; Occhipinti, A.; Pagad, S.; Poore, G. C. B; Robinson, T. B.; Sterrer, W.; Turon, X.; Willan, R. C.; Zhan, A. (2021) World Register of Introduced Marine Species (WRiMS) at: http://www.marinespecies.org/introduced/aphia.php?p=taxdetails&id=397010 on 2025-05-14

Costello, M. J.; Ahyong, S.; Bieler, R.; Boudouresque, C.; Desiderato, A.; Downey, R.; Galil, B. S.; Gollasch, S.; Hutchings, P.; Kamburska, L.; Katsanevakis, S.; Kupriyanova, E.; Lejeusne, C.; Ma, K. C. K.; Marchini, A.; Occhipinti, A.; Pagad, S.; Pino, L.; Poore, G. C. B.; Rewicz, T.; Rius, M.; Robinson, T. B.; Sobczyk, R.; Stępień, A.; Turon, X.; Valls Domedel, G.; Verleye, T.; Vieira, L. M.; Willan, R. C.; Zhan, A. (2025). World Register of Introduced Marine Species (WRiMS). Adelactaeon Cossmann, 1895. Accessed at: https://www.marinespecies.org/introduced/aphia.php?p=taxdetails&id=397010 on 2025-05-14

[taxonomic tree]