A group of mollusks that includes the land snails and slugs and many freshwater snails. They have a modified mantle cavity that acts as a lung for breathing air.
- ‘The latter group includes radically modified animals, the Opisthobranchia and Pulmonata, which undergo detorsion and essentially re-evolve bilateral symmetry.’
- ‘In the traditional classification system, the class Gastropoda has been divided into three subclasses, Prosobranchia, Pulmonata, and Opisthobranchia.’
- ‘Haszprunar and Bandel suggested a subdivision of the Heterostropha into the Allogastropoda and Euthyneura, with the Euthyneura including the Opisthobranchia and Pulmonata.’
Modern Latin (plural), from Latin pulmo, pulmon- lung.