basis of record
Bouillon, J.; Boero, F. (2000). Synopsis of the families and genera of the Hydromedusae of the world, with a list of the worldwide species. <i>Thalassia Salent. 24</i>: 47-296 (look up in IMIS) [details]
From editor or global species database
Taxonomy The taxon Moerisiidae sensu Petersen (1990) is polyphyletic, Hydra is not related to Moerisia, see Collins et al. 2006. [details]