The reproductive system of gastropods varies greatly from one group to another within this very large and diverse taxonomic class of animals. Their reproductive strategies also vary greatly.
Marine gastropods mating.
A stack of the protandrous species Crepidula fornicata: the small individual at the extreme lower left is currently a male, the other individuals are large enough to have become female
Head of a mating Helix pomatia showing the everted penis (P), and the dart sac (S) in the process of shooting a love dart (D).
Head of Helix pomatia after mating with everted vagina (V) and penis (P).
Arion distinctus
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Arion distinctus is a species of air-breathing land slug in the family Arionidae, sometimes known as the roundback slugs. It is a terrestrial pulmonate gastropod mollusc. Several vernacular names exis
