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[Orthogastropoda]
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Coleophysis carinata
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Pyrunculus
Pyrunculus caelatus
Pyrunculus conulus
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Retusa
Retusa alba
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Retusa montereyensis
Retusa obtusa
[
Retusa pertenius
]
Retusa obtusa lajonkaireana
Retusa obtusa obtusa
Retusa obtusa turrita
Retusa ovata
Retusa semen
Retusa sulcata
Retusa truncatula
Retusa turrita
Retusa umbilicata
Retusa umbilicata nitidula
Retusa umbilicata umbilicata
Retusa xystrum
[
Sulcoretusa xystrum
]
Sulcoretusa
Volvulella
[
Rhizorus
]
Volvulella acuminatus
[
Rhizorus acuminatus
]
Volvulella californica
Volvulella catharia
Volvulella cylindrica
[
Volvulella callicera
]
Volvulella panamica
Volvulella paupercula
[
Volvulella aspinosa
]
Volvulella persimilis
[
Volvulella oxytata
]
Volvulella recta
Volvulella texasiana