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1,156 littorinimorpha species
Melanella opaca
Anticlimax athleenae
Melanella thersites
Eratoena sandwichensis
Cymatium femorale
Cochliolepis planispiralis
Teinostoma cocolitoris
Semicassis umbilicata
Littoraria irrorata
Aphaostracon asthenes
Aphaostracon monas
Assiminea grayana
Assiminea pecos
Bursa bufonia
Clappia umbilicata
Floridobia monroensis
Floridobia parva
Floridobia wekiwae
Marstonia castor
Marstonia olivacea
Marstonia pachyta
Pyrgulopsis avernalis
Pyrgulopsis bacchus
Pyrgulopsis conica
Pyrgulopsis cruciglans
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