Pheidole guilelmimuelleri ultrix Forel, 1912 junior synonym of current valid taxon Pheidole heyeri Forel, 1899
Pheidole guilelmimuelleri var. ultrix Forel, 1912g: 221 (s.) BRAZIL (São Paulo). Neotropic.
Primary type information: Primary type material: holotype (?) major worker. Primary type locality: Brazil: São Paulo, Botucatu (Göldi). Primary type depository: MHNG. Type notes: No indication of number of specimens is given.
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