Formica dryas gymnomma Wheeler, 1905 junior synonym of current valid taxon Formica obscuriventris Mayr, 1870
Formica dryas var. gymnomma Wheeler, 1905d: 269 (w.) U.S.A. (New York). Nearctic.
Primary type information: Primary type material: syntype workers (number not stated). Primary type locality: U.S.A.: New York, Long I., Cold Spring Harbor (by restriction of Wheeler, 1913i: 448). Primary type depository: MCZC. Type notes: Other original syntype locality: U.S.A.: Illinois, Rockford (W.M. Wheeler).
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