Iridomyrmex florissantius

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Iridomyrmex florissantius
Temporal range: Late Eocene
Florissant, Colorado, United States
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hymenoptera
Family: Formicidae
Subfamily: Dolichoderinae
Genus: Iridomyrmex
Species: I. florissantius
Binomial name
Iridomyrmex florissantius
Carpenter, 1930

This species, based on a series of impression fossil queens, is only tentatively placed in Iridomyrmex as very little morphological detail is available. It is unlikely that this species is related to modern Iridomyrmex, but so little information is available that it is extremely difficult to determine its true relationships. As such it is retained in Iridomyrmex as incertae sedis with strong reservations that it actually belongs here.



This taxon was described from the United States.




The following information is derived from Barry Bolton's New General Catalogue, a catalogue of the world's ants.

  • florissantius. †Iridomyrmex florissantius Carpenter, 1930: 50, pl. 2, fig. 4; pl. 10, fig. 7 (q.) U.S.A. (Oligocene). Provisionally retained in Iridomyrmex: Shattuck, 1992a: 15. Unidentifiable taxon, incertae sedis in Iridomyrmex: Heterick & Shattuck, 2011: 168.

Type Material

  • Holotype, queen, United States (Eocene).



  • Shattuck, S. O. 1992a. Review of the dolichoderine ant genus Iridomyrmex Mayr with descriptions of three new genera (Hymenoptera: Formicidae). J. Aust. Entomol. Soc. 31: 13-18 (page 15, Provisionally retained in Iridomyrmex)