They are pulmonate gastropod mollusks related to land slugs and snails. Stylommatophora is an order of air-breathing land snails and slugs, terrestrial pulmonate gastropod molluscs. The name is most often applied to land snails, terrestrial pulmonate gastropod molluscs. These aquatic pulmonate gastropod mollusks are approximately the size of unpopped corn kernels. It is a shell-less pulmonate gastropod mollusc in the family Trigonochlamydidae. Like almost all pulmonate gastropods, these snails are hermaphrodites, having male and female sex organs. This species uses pulmonate snails as hosts. Most pulmonate air-breathing land snails perform courtship behaviors before mating. SEM images of love darts from eight different species of pulmonate land snails. Like most pulmonate land snails, it is hermaphrodite and must mate to produce fertile eggs. Like almost all pulmonate snails, it is a hermaphrodite. It confirmed Acochlidiacea in a pulmonate relationship, as sister to Eupulmonata. Pulmonate land gastropods are simultaneous hermaphroditic and their reproductive system is complex.