Taxa named by Paul Henri Fischer

The order Aplysiida, commonly known as sea hares (Aplysia species and related genera), are medium-sized to very large opisthobranch gastropod molluscs with a soft internal shell made of protein. These are marine gastropod molluscs in the superfamilies Aplysioidea and Akeroidea.

Actinonaias is a genus of freshwater mussels in the family Unionidae.

Basilissopsis is a genus of sea snails in the family Seguenziidae.

species of mollusc

species of mollusc

Hemisinidae is a family of snails in the superfamily Cerithioidea. They occur in freshwater and brackish environments on all continents except Australia and Antarctica.