Unionoidea Rafinesque 1820

Vombsjön, Skåne, Sverige

Salten Sø

Section of shell of Unio (A). Horizontal shell of Pinna, showing the hexagonal prisms (B)

Pink heel-splitter, Lampsilis alata (Say), from Mississippi River, Upper left and middle right; White heel-splitter, Symphynota complanata (Barnes), from Kankakee River, lower left and lower right.

Lake Pepin mucket, Lampsilis luteola (Lamarck), upper; Yellow sand-shell, Lampsilis anodontoides (Lea), middle; Pocketbook, Lampsilis ventricosa (Barnes), lower.

Rear view of Anodonta corpulenta showing siphonal openings. Note the very smooth margins of the upper exhalent opening and the fimbriae or feelers protecting the lower or inhalent opening.

Unio pictorum (Linnaeus).

Bullhead (Pleurobema aesopus). Warty-Back (Quadrula pustulosa). Butterfly (Plagiola securis). Outside and inside views.

Grandma, Lampsilis ovata (Say), from Cumberland River, upper; Pocketbook, Lampsilis capax (Green), from Mississippi River, lower.