Flabellinopsidae is a family of nudibranchs, shell-less marine gastropod molluscs or sea slugs, in the superfamily Flabellinoidea.Korshunova, T.; Martynov, A.; Bakken, T.; Evertsen, J.; Fletcher, K.; Mudianta, W.; Saito, H.; Lundin, K.; Schrödl, M.; Picton, B. (2017). Polyphyly of the traditional family Flabellinidae affects a major group of Nudibranchia: aeolidacean taxonomic reassessment with descriptions of several new families, genera, and species (Mollusca, Gastropoda). ZooKeys. 717: 1-139.
Genera According to Korshunova et al. (2025), genera within the family Flabellinopsidae include: Baenopsis Flabellinopsis
According to Ekimova et al. (2026), genera within the family Flabellinopsidae include: Baenopsis Bajaeolis [placed in Facelinidae by Korshunova et al. (2025)] Flabellinopsis Kynaria
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