Actinopteri /æktɪˈnɒptər/ is the sister group of Cladistia in the class Actinopterygii (ray-finned fish).

Atlantic sturgeon flipped.jpg
Atlantic sturgeon (Chondrostei)
Salmo salar flipped.jpg
Atlantic salmon (Neopterygii)
Scientific classification e
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
(unranked): Actinopteri
Cope, 1871

Dating back to the Permian period, the Actinopteri comprise the Chondrostei (sturgeons and paddlefish) and the Neopterygii (bowfin, gars, and teleosts). In other words, the Actinopteri include all extant Actinopterygians, minus the Polypteridae (bichirs).


The following cladogram[1][2][3][4] summarizes the evolutionary relationships of extant Actinopteri. Divergence time for each clade in mya are based on:[5]

Actinopteri 400 mya

Acipenseriformes (sturgeons, paddlefish)  

Neopterygii 360 mya
Holostei 275 mya

Lepisosteiformes (gars, alligator gars)  


Amiiformes (bowfin)  

Teleostei 310 mya  


  1. ^ Betancur-R (2016). "Phylogenetic Classification of Bony Fishes Version 4".
  2. ^ Nelson, Joseph, S. (2016). Fishes of the World. John Wiley & Sons, Inc. ISBN 9781118342336.
  3. ^ "Actinopterygii". Integrated Taxonomic Information System. Retrieved 3 April 2006.
  4. ^ R. Froese and D. Pauly, editors (February 2006). "FishBase".
  5. ^ Thomas J. Near; et al. (2012). "Resolution of ray-finned fish phylogeny and timing of diversification". PNAS. 109 (34): 13698–13703. doi:10.1073/pnas.1206625109. PMC 3427055. PMID 22869754.