†Formica annosa LaPolla & Greenwalt, 2015: 168, figs. 7, 15d (m.) U.S.A. (Montana, Eocene).

Primary type information: Primary type locality: U.S.A.: Kishenehn Formation: Montana: Middle Fork of the Flathead River between Paola and Coal Creeks. Primary type depository: USNM. Primary type specimen: USNM#609591.