Archaeus is an extinct genus of jackfish from the Paleogene of Europe. The oldest species, A. oblongus is from the late/terminal Thanetian epoch of Paleocene Turkmenistan, and the last species, A. glarisianus and possibly A. brevis, are from the early to middle Rupelian, of the Oligocene lagerstatten of Canton Glarus, Switzerland. In life, Archaeus species would have resembled a small trevally, though, Archaeus had a proportionally smaller mouth, and larger eyes, and the tail was more fan-shaped, rather than crescent-shaped.

Temporal range: Thanetian to Rupelian
Archaeus species.JPG
A. glarisianus & A. brevis
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Carangiformes
Family: Carangidae
Genus: Archaeus
Agassiz, 1834
Type species
Archaeus glarisianus
Agassiz 1834
  • A. glarisianus
    Agassiz 1834
  • ?A. brevis
    Agassiz 1844
  • A. oblongus
    Daniltshenko, 1968
  • Archaeoides
    Rath 1859
A. oblongus from Late Paleocene Turkmenistan


  • Catalogue of the fossil fishes in the British museum (Natural history) [1]
  • PROKOFIEV Artém M. The Late Paleocene fish fauna of Turkmenistan