Sphaeriidae is a family of small to minute freshwater bivalve molluscs in the order Sphaeriida. In the US, they are commonly known as pea clams or fingernail clams.
Pisidium is a genus of very small or minute freshwater clams known as pill clams or pea clams, aquatic bivalve molluscs in the family Sphaeriidae, the pea clams and fingernail clams.
Assiminea is a genus of minute, salt-tolerant snails with an operculum, aquatic gastropod mollusks, or micromollusks, in the family Assimineidae.
Renea is a genus of air-breathing land snails with an operculum, terrestrial gastropod mollusks in the family Aciculidae.
The Littorinidae are a taxonomic family of over 200 species of sea snails, marine gastropod molluscs in the clade Littorinimorpha, commonly known as periwinkles and found worldwide.
Cylindrobulla is a genus of sea snails or bubble snails, marine gastropod mollusks in the clade Sacoglossa.
Margarya is a genus of large operculate freshwater snails, aquatic gastropod mollusks in the family Viviparidae.
Minolia is a genus of sea snails, marine gastropod mollusks in the family Solariellidae.
Euchelus is a genus of sea snails, marine gastropod mollusks in the family Chilodontaidae.
Isanda is a genus of sea snails, marine gastropod mollusks in the family Trochidae, the top snails.
Pisulina is a genus of submarine cave snails, marine gastropod mollusks in the family Neritiliidae.
Mainwaringia is a genus of sea snails or freshwater snails, marine gastropod mollusks in the family Littorinidae, the winkles or periwinkles.
Peasiella is a genus of sea snails, marine gastropod mollusks in the family Littorinidae, the winkles or periwinkles.
Eucithara is a genus of small to quite large sea snails, marine gastropod mollusks in the family Mangeliidae.
Schwartziella is a genus of minute sea snails, marine gastropod mollusks or micromollusks in the family Zebinidae.
Hemilienardia is a genus of sea snails, marine gastropod mollusks in the family Raphitomidae, the turrids.
Tallorbis is a genus of sea snails, marine gastropod mollusks in the family Chilodontaidae.
Tucetona is a genus of saltwater clams, marine bivalve molluscs in the family Glycymerididae, the bittersweet clams. Unlike other genera in the family, Tucetona species have a ribbed shell.
Citharomangelia is a genus of small predatory sea snails, marine gastropod mollusks in the family Mangeliidae.
Afropisidium pirothi is a species of bivalve belonging to the family Sphaeriidae.
