Order

Littorinimorpha

Angustassiminea californica. Photo: (c) Ken-ichi Ueda, some rights reserved (CC BY)

iNaturalist • Wikipedia

Littorinimorpha is a large clade of snails, gastropods, consisting primarily of sea snails (marine species), and also in addition some freshwater snails (aquatic species) and land snails (terrestrial species).

— Wikipedia

Subtaxa

Superfamily: Velutinoidea (Trivia, erato and allies)

Superfamily: Littorinoidea (Periwinkle snails and allies)

Superfamily: Truncatelloidea (Looping snails and allies)

Superfamily: Naticoidea

Where in Humboldt

Discussion

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