Eotetrapodiformes

Eotetrapodiformes is a clade of tetrapodomorphs including the four-limbed vertebrates ("tetrapods" in the traditional sense) and their closest finned relatives, two groups of stem tetrapods called tristichopterids and elpistostegalids. The clade was named in 2010 by Michael I. Coates and Matt Friedman, and is defined as "the node-based clade arising from the most recent common ancestor of Eusthenopteron and Ichthyostega plus all of its descendants".[2] It thus excludes the basalmost tetrapodomorphs, such as the rhizodonts and megalichthyiforms.[2]

Eotetrapodiformes
Temporal range:
Skull of the tristichopterid Platycephalichthys in CosmoCaixa Barcelona
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Clade: Tetrapodomorpha
Clade: Eotetrapodiformes
Coates & Friedman, 2010
Subgroups

Cladogram from Swartz, 2012:[3]

 
 

Megalichthyiformes

 
Eotetrapodiformes
 

Tristichopteridae

 
 
 

Tinirau

 
 
 

Platycephalichthys

 
Elpistostegalia
 

Panderichthys

 
 
 
 

Tiktaalik

 
 

Elpistostege

 
 
 
 

Elginerpeton

 
 
 

Ventastega

 
 
 

Acanthostega

 
 
 

Ichthyostega

 
 
 

Whatcheeriidae

 
 
 

Colosteidae

 
 
 

Crassigyrinus

 
 
 

Baphetidae

 
 

Tetrapoda (Crown group)

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

References

  1. Clement, A. M.; Cloutier, R.; Lu, J.; Perilli, E.; Maksimenko, A.; Long, J. (2021). "A fresh look at Cladarosymblema narrienense, a tetrapodomorph fish (Sarcopterygii: Megalichthyidae) from the Carboniferous of Australia, illuminated via X-ray tomography". PeerJ. 9: e12597. doi:10.7717/peerj.12597.
  2. Coates, M. I.; Friedman, M. (2010). "Litoptychus bryanti and characteristics of stem tetrapod neurocrania". In Elliot, D.K.; Maisey, J.G.; Yu, X.; Miao, D. (eds.). Morphology, Phylogeny and Paleobiogeography of Fossil Fishes. Pfeil. pp. 389–416. ISBN 978-3-89937-122-2.
  3. Swartz, B. (2012). "A marine stem-tetrapod from the Devonian of Western North America". PLOS ONE. 7 (3): e33683. Bibcode:2012PLoSO...733683S. doi:10.1371/journal.pone.0033683. PMC 3308997. PMID 22448265.


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