Actinistia

Actinistia Temporal range: Devonian–Recent PreЄ Є O S D C P T J K Pg N
West Indian Ocean coelacanth
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Sarcopterygii
Subclass:	Actinistia Cope, 1871
Daughter taxa
Orders Coelacanthiformes Families Rebellatricidae Genera Indocoelacanthus Spermatodus
Synonyms
Coelacanthimorpha

Whiteia fossils

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

A, Miguashaia bureaui, Shultze, 1973, Upper Devonian (Frasnian), Migausha, Canada;
B, Diplocercides heiligostockiensis, Jessen (1966), Upper Devonian (Frasnian), Bergisch-Gladbach, Germany;
C, Serenicthys kowiensis gen. et sp. nov., Upper Devonian (Famennian), Grahamstown, South Africa;
D, Allenypterus montanus Melton 1969, Lower Carboniferous (Namurian), Montana, USA;
E, Rhabdodema elegans, (Newberry, 1856), Upper Carboniferous (Westphalian), Linton, Ohio, USA;
F, Latimeria chalumnae Smith 1939, recent, east coast of Africa.

The following cladograms are based on multiple sources.^{[1][2][3][4][5]}

	Rhipidistia
Actinistia	Miguashaiidae Gavinia Miguashaia Diplocercidae Dictyonosteus Diplocercides Hadronectoridae Hadronector Allenypterus Holopterygius Lochmocercus Polyosteorhynchus Rhabdodermatidae Rhabdoderma Caridosuctor Synaptolus Sassenia Coelacanthidae Axelia Coelacanthus Wimania Ticinepomis Laugiidae Coccoderma Laugia Trachymetopon Spermatodus Coelacanthiformes

Coelacanthiformes	Whiteiidae Piveteauia Whiteia Rebellatricidae Rebellatrix Latimerioidei Garnbergia Mawsoniidae Chinlea Parnaibaia Mawsonia Axelrodichthys Diplurus Libys Latimeriidae Holophagus Undina Macropoma Swenzia Latimeria

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.