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1,100,502 specimens across 6 departments, collected since 1754 — 100,256 names, 42,336 type specimens.
Paraxenisthmus springeriHolotype
BPBM 34995 · J.E. Randall and G.R. Allen, 1973
Florida Island, Solomon Islands
Xenisthmus oligoporusParatype
BPBM BPBM 27446, 1 · J. E. Randall, 1980
Sudan
Xenisthmus baliusHolotype
BPBM BPBM 30458, 1 · J. E. Randall & A. B. Tarr & J. E. Burfhard, 1984
Saudi Arabia
Xenisthmus baliusParatype
BPBM BPBM 33308, 1 · J. E. Randall & L. J. McCarthy & B. E. Stanaland & A. B. Tarr, 1985
Iceland
Xenisthmus baliusHolotype
BPBM 30458 · J.E. Randall, A.B. Tarr, and J.E. Burchard, 1984
Jana Island
Xenisthmus baliusParatype
BPBM 33308 · J.E. Randall, L.J. McCarthy, B.E. Stanaland, and A.B. Tarr, 1985
Jana Island
Xenisthmus baliusParatype
BPBM 33353 · J.E. Randall, L.J. McCarthy, B.E. Stanaland, and A.B. Tarr, 1985
Jana Island
Xenisthmus eirospilusParatype
BPBM 39134 · J.E. Randall, R.C. Wass, and VISTA volunteers, 1974
Tutuila Island