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1,100,502 specimens across 6 departments, collected since 1754 — 100,256 names, 42,336 type specimens.
Pyramidella acus
BPBM 257229
T. Dranga & D. Thaanum; Thaanum, Ditlev, 1940
Beqa, Fiji
Pyramidella acus
BPBM 257225
Milton J. Flood; Thaanum, Ditlev
Australia
Pyramidella acus
BPBM 257226
Thaanum, Ditlev
Mauritius
Pyramidella acus
BPBM 257227
D.B. Langford & D. Thaanum; Thaanum, Ditlev, 1925
Japan
Pyramidella acus
BPBM 257228
D.B. Langford & D. Thaanum; Thaanum, Ditlev, 1932
Ryukyu Islands
Pyramidella acus
BPBM 257230
D.B. Langford; Thaanum, Ditlev, 1949
Koror, Palau
Pyramidella acus
BPBM 258027
Ostergaard, J. M.; Ostergaard, Jens M., 1926
Tonga