Formica nana

The binomial name Formica nana may refer to any of three distinct species currently or formerly placed within the ant genus Formica.

Formica nana Latreille, 1802, an unidentifiable species^[a] placed incertae sedis in Formica
Formica nana Jerdon, 1851, a species of ghost ant now known as Tapinoma nana, a junior synonym of Tapinoma melanocephalum
Formica nana Smith, 1858, a species of carpenter ant now known as Camponotus nywet, a junior synonym of Camponotus novogranadensis

Notes

↑ Due to various reasons like loss of or extensive damage to the type specimen, a description deemed too vague to identify to the species level, or often both simultaneously, this species is considered unidentifiable to the species level in modern taxonomy, although it technically remains a valid binomen.