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

2 specimens

Acmaea testudinalis

BPBM 197019

C.F. Mant; Joseph Swift Emerson, 1930
Canada

Acmaea testudinalis

BPBM 197021

J.R.Le B Tomlin; Joseph Swift Emerson, 1925
Scotland