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Actinistia Temporal range: Devonian–Recent PreꞒ Ꞓ O S D C P T J K Pg N
West Indian Ocean coelacanth
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Clade:	Sarcopterygii
Class:	Actinistia Cope, 1871
Daughter taxa
Miguashaiidae Diplocercidae Hadronectoridae Rhabdodermatidae Laugiidae Coelacanthiformes
Synonyms
Coelacanthimorpha

Actinistia is a subclass of mostly fossil lobe-finned fishes. This subclass contains the coelacanths (Order Coelacanthiformes), including the two living species of coelacanths, both of the genus Latimeria: the West Indian Ocean coelacanth and the Indonesian coelacanth.

Taxonomy

• Class Sarcopterygii (lobe-finned fishes and tetrapods)
  • Subclass Actinistia
    • Family Miguashaiidae (Devonian)
      • †Miguashaia
    • Family Diplocercidae (Devonian and Lower Carboniferous)
      • †Dictyonosteus
      • †Diplocercides (Nesides)
    • Family Hadronectoridae
      • †Allenypterus
      • †Hadronector
      • †Holopterygius
      • †Lochmocercus
      • †Polyosteorhynchus
      • †Spermatodus
    • Family Rhabdodermatidae (Primarily Carboniferous)
      • †Caridosuctor
      • †Rhabdoderma
      • †Sassenia
    • Family Laugiidae (Lower Triassic to Lower Cretaceous)
      • †Coccoderma
      • †Laugia
      • †Trachymetopon
    • Order Coelacanthiformes (coelacanths)
      • †Family Whiteiidae
      • †Family Rebellatricidae
      • Suborder Latimerioidei
        • †Family Mawsoniidae
        • Family Latimeriidae

Phylogeny

The following cladograms are based on multiple sources.

See also

• Lazarus taxon

References

1. Wendruff, A. J.; Wilson, M. V. H. (2012). "A fork-tailed coelacanth, Rebellatrix divaricerca, gen. et sp. nov. (Actinistia, Rebellatricidae, fam. nov.), from the Lower Triassic of Western Canada". Journal of Vertebrate Paleontology. 32 (3): 499–511. doi:10.1080/02724634.2012.657317.
2. Gallo, V.; M.S.S. de Carvalho; H.R.S. Santos (2010). "New occurrence of †Mawsoniidae (Sarcopterygii, Actinistia) in the Morro do Chaves Formation, Lower Cretaceous of the Sergipe-Alagoas Basin, Northeastern Brazil". Boletim do Museu Paraense Emílio Goeldi. 5 (2): 195–205.
3. Long, J. A. (1995). The rise of fishes: 500 million years of evolution. Baltimore: Johns Hopkins University Press.
4. Cloutier, R.; Ahlberg, P. E. (1996). Morphology, characters, and the interrelationships of basal sarcopterygians. pp. 445–479.
5. Clement, G. (2005). "A new coelacanth (Actinistia, Sarcopterygii) from the Jurassic of France, and the question of the closest relative fossil to Latimeria". Journal of Vertebrate Paleontology. 25 (3): 481–491. doi:10.1671/0272-4634(2005)025[0481:ancasf]2.0.co;2.

• Lobe-finned fish
• Living fossils
• Live-bearing fish
• Ovoviviparous fish
• Extant Devonian first appearances
• Vertebrate subclasses