Protonym: Formica rufa subsp. difficilis
Authorship Emery, 1893k: 651, pl. 22, figs. 9, 14
Forms w.q.m.
Bioregion Nearctic
Locality U.S.A. (Virginia)
Primary type information Primary type material: syntype workers, syntype queens, syntype males (numbers not stated). Primary type locality: U.S.A.: Virginia (T. Pergande) (by restriction of Wheeler, 1913i: 478). Primary type depositories: AMNH, MCZC.
Type notes Other original syntype locality: U.S.A.: New Jersey (T. Pergande), later designated as type locality by Creighton, 1950a: 500.
Taxa belonging to this protonym
Formica difficilis Species Valid
Formica rufa difficilis Subspecies Obsolete combination
an obsolete combination of Formica difficilis Emery, 1893
Original combination