Formica arcana Scudder, 1877 valid
Formica arcana Scudder, 1877a: 266 (wing) CANADA (British Columbia, Eocene).
  • Status as species: Scudder, 1891: 699; Dalla Torre, 1893: 193; Handlirsch, 1907: 863; Bolton, 1995b: 191.
  • *Incertae sedis* in Formicidae: Carpenter, 1930: 21.
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