Florissant Fossil

Florissant Fossil
Age (Ma)
Start:	37.2
End:	33.9
System/Period:	Paleogene
Series/Epoch:	Eocene
Location
Location:	Florissant, Colorado
Country:	United States
Coordinates:	38.9°N, 105.3°W
Diversity
Genera:	19
Species:	33

Fossils from the formation at Florissant, Colorado are thought to be from 34.07 mya (± 0.10 m.y.) (Evanoff et al. 2001).

Genera known from Florissant

• Aphaenogaster
• Archiponera
• Camponotus
• Cephalomyrmex
• Dolichoderus
• Elaeomyrmex
• Eulithomyrmex
• Formica
• Iridomyrmex
• Lasius
• Liometopum
• Messor
• Mianeuretus
• Miomyrmex
• Petraeomyrmex
• Pheidole
• Pogonomyrmex
• Protazteca
• Pseudomyrmex

Species known from Florissant

• Aphaenogaster donisthorpei
• Aphaenogaster mayri
• Archiponera wheeleri
• Camponotites fuscipennis
• Camponotites microcephalus
• Camponotites petrifactus
• Cephalomyrmex rotundatus
• Dolichoderus antiquus
• Dolichoderus rohweri
• Elaeomyrmex coloradensis
• Elaeomyrmex gracilis
• Eulithomyrmex rugosus
• Eulithomyrmex striatus
• Formica cockerelli
• Formica grandis
• Formica robusta Carpenter
• Iridomyrmex florissantius
• Iridomyrmex obscurans
• Lasius peritulus
• Liometopum miocenicum
• Liometopum scudderi
• Messor sculpturatus
• Mianeuretus mirabilis
• Miomyrmex impactus
• Miomyrmex striatus
• Petraeomyrmex minimus
• Pheidole tertiaria
• Pogonomyrmex fossilis
• Protazteca capitata
• Protazteca elongata
• Protazteca hendersoni
• Protazteca quadrata
• Pseudomyrmex extinctus

Location of Formation

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References

• Evanoff, E., Mcintosh, W.C., Murphey ,P.C. 2001. Stratigraphic summary and 40Ar/39Ar Geochronology of the Florissant Formation, Colorado. In Evanoff E, Gregory Wodzicki KM, Johnson KR (Eds) Fossil flora and stratigraphy of the Florissant Formation, Colorado. Proceedings of the Denver Museum of Nature and Science 4(1): 1–16.