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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
Orders Coelacanthiformes Families Rebellatricidae Genera Indocoelacanthus Spermatodus
Synonyms
Coelacanthimorpha

Actinistia is a subclass of mostly fossil lobe-finned fishes. This subclass contains the coelacanths, including the two living coelacanths, the West Indian Ocean coelacanth and the king of the sea.

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 (modern coelacanths and their most recent ancestors)

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. "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. 2010. {{cite journal}}: Unknown parameter |authors= ignored (help)
3. The rise of fishes: 500 million years of evolution. Baltimore: Johns Hopkins University Press. 1995. {{cite book}}: Unknown parameter |authors= ignored (help)
4. Morphology, characters, and the interrelationships of basal sarcopterygians. 1996. pp. 445–479. {{cite book}}: Unknown parameter |authors= ignored (help)
5. "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. 2005. doi:10.1671/0272-4634(2005)025[0481:ancasf]2.0.co;2. {{cite journal}}: Unknown parameter |authors= ignored (help)

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