Belongs within: Heterobranchia.Contains: Orbitestellidae. The Prionoglossa are a group of minute, low-spired or planispiral marine molluscs. Members of the Prionoglossa are simultaneous hermaphrodites that perform internal fertilisation despite the absence of a true penis. They include the Omalogyridae which have a greatly reduced radula consisting of only a single rachidian tooth per row. <==PrionoglossaGS75 |–OmalogyroideaS11… Continue reading Prionoglossa