Various pupillid genera also, such as Orcula (Orculidae) and Lauria (Lauriidae), have apertural armature during the neanic stage.
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By the structure of the male organs Strobilops resembles Vallonia, Pupilla, Lauria, the Achatinellidae, and some other groups are similar in having a bifurcate penial retractor and a long, tripartite appendix.