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1,100,502 specimens across 6 departments, collected since 1754 — 100,256 names, 42,336 type specimens.

Littorina coccinea
BPBM 228599
Langford & Thaanum; Thaanum, 1947
Romanum, Federated States of Micronesia

Littorina exigua
BPBM 228619
Langford & Thaanum; Thaanum, 1947
Romanum, Federated States of Micronesia

Littorina scabra
BPBM 228713
Langford & Thaanum; Thaanum, 1947
Romanum, Federated States of Micronesia

Littorina undulata
BPBM 228770
Langford & Thaanum; Thaanum, 1947
Romanum, Federated States of Micronesia

Risellopsis
BPBM 228998
Langford & Thaanum; Thaanum, 1947
Romanum, Federated States of Micronesia
