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

2 specimens

Hydatina zonata

BPBM 258754

D.B. Langford & D. Thaanum; Thaanum, Ditlev, 1925
Ryukyu Islands

Hydatina zonata

BPBM 258755

Thaanum, Ditlev
Japan