Formica fusca densiventris Viereck, 1903 an obsolete combination of Formica densiventris Viereck, 1903
Formica fusca var. densiventris Viereck, 1903: 74 (w.) U.S.A. (New Mexico). Nearctic.
Primary type information: Primary type material: 2 syntype workers. Primary type locality: U.S.A.: New Mexico, Beulah, 17.viii.1901 (H. Skinner). Primary type depository: ANSP.
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