(ofCeratia watsoni Hornung & Mermod, 1927)Hornung A. & Mermod G. (1927-1928). Mollusques de la Mer Rouge recueillis par A. Issel faisant partie des collections du Musée Civique d'Histoire Naturelle de Gênes. Quatrième partie, Rissoidés. <em>Annali del Museo Civico di Storia Naturale Giacomo Doria, Genova.</em> 52: 363-369 [20 December 1927]; 370-372 [19 January 1928]. Preprint 363-372 [6 December 1927]., available online athttp://www.biodiversitylibrary.org/page/33395623 page(s): 369 [details]
MolluscaBase eds. (2025). MolluscaBase. Monotygma watsoni (Hornung & Mermod, 1927). Accessed through: Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2025) European Register of Marine Species at: http://www.marbef.org//www.marbef.org/data/aphia.php?p=taxdetails&id=871230 on 2026-07-14
Costello, M.J.; Bouchet, P.; Boxshall, G.; Arvanitidis, C.; Appeltans, W. (2026). European Register of Marine Species. Monotygma watsoni (Hornung & Mermod, 1927). Accessed at: https://www.vliz.be/vmdcdata/narms/narms.php?p=taxdetails&id=871230 on 2026-07-14
original description(ofCeratia watsoni Hornung & Mermod, 1927)Hornung A. & Mermod G. (1927-1928). Mollusques de la Mer Rouge recueillis par A. Issel faisant partie des collections du Musée Civique d'Histoire Naturelle de Gênes. Quatrième partie, Rissoidés. <em>Annali del Museo Civico di Storia Naturale Giacomo Doria, Genova.</em> 52: 363-369 [20 December 1927]; 370-372 [19 January 1928]. Preprint 363-372 [6 December 1927]., available online athttp://www.biodiversitylibrary.org/page/33395623 page(s): 369 [details]
basis of recordBogi C. & Galil B.S. (2013). <i>Monotygma watsoni</i>, an erythraean alien pyramidellid (Mollusca Gadstropoda: Heterobranchia) newly recorded in the Mediterranean Sea. <em>Marine Biodiversity Records.</em> 6: e80 (5 pp.)., available online athttps://doi.org/10.1017/s175526721300047x[details] Available for editors
new combination referenceBogi C. & Galil B.S. (2013). <i>Monotygma watsoni</i>, an erythraean alien pyramidellid (Mollusca Gadstropoda: Heterobranchia) newly recorded in the Mediterranean Sea. <em>Marine Biodiversity Records.</em> 6: e80 (5 pp.)., available online athttps://doi.org/10.1017/s175526721300047x[details] Available for editors
Present Inaccurate Introduced: alien Containing type locality