dcsimg

Tristichopteridae

provided by wikipedia EN

Tristichopterids (Tristichopteridae) were a diverse and successful group of tetrapodomorph fishes living throughout the Middle and Late Devonian. They first appeared in the Givetian stage of the Middle Devonian. Within the group sizes ranged from a few tens of centimeters (Tristichopterus) to several meters (Hyneria and Eusthenodon).

Some tristichopterids share some of the features of the elpistostegalians, a paraphyletic assemblage of fishes close to the origin of tetrapods. This mainly concerns the shape of the skull and a reduction in size of the posterior fins.

An old and persistent notion is that Eusthenopteron was able to crawl onto land using its fins. However, there is no evidence actually supporting this idea. All tristichopterids went extinct by the end of Late Devonian.

Genera of Tristichopterids

Phylogeny

Below is a cladogram modified from Swartz, 2012.[1]

   

?†Devonosteus proteus Jaekel 1927

   

?†Callistipterus clappi

   

?†Heddleichthys dalgleisiensis Anderson 1859

   

?†Hyneria lindae Thomson 1968

   

?†Langlieria socqueti (Clément et al., 2009)

   

?†Litoptychius bryanti Vorobyeva 1977

   

?†Notorhizodon mackelveyi Young, Long & Ritchie 1992

   

Spodichthys buetler Jarvik 1985

     

Tristichopterus alatus Egerton 1861

     

Eusthenopteron Whiteaves 1881

     

Jarvikina wenjukowi (Rohon 1889) Vorobyeva 1977

     

Cabonnichthys burnsi Ahlberg & Johanson 1997

     

Mandageria fairfaxi Johanson & Ahlberg 1997

   

Eusthenodon Jarvik 1952

             

References

  • Ahlberg, PE and Z Johanson (2001). "Second tristichopterid (Sarcopterygii, Osteolepiformes) from the Upper Devonian of Canowindra, New South Wales, Australia, and phylogeny of the Tristichopteridae." in Journal of Vertebrate Paleontology 17:563-673.
  • Johanson, Z. and P.E. Ahlberg (1997). "New tristichopterid (Osteolepiformes; Sarcopterygii) from the Mandagery Sandstone (Famennian) near Canowindra, N.S.W., Australia." in Transactions of the Royal Society of Edinburgh 88:39-53.
 title=
license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN

Tristichopteridae: Brief Summary

provided by wikipedia EN

Tristichopterids (Tristichopteridae) were a diverse and successful group of tetrapodomorph fishes living throughout the Middle and Late Devonian. They first appeared in the Givetian stage of the Middle Devonian. Within the group sizes ranged from a few tens of centimeters (Tristichopterus) to several meters (Hyneria and Eusthenodon).

Some tristichopterids share some of the features of the elpistostegalians, a paraphyletic assemblage of fishes close to the origin of tetrapods. This mainly concerns the shape of the skull and a reduction in size of the posterior fins.

An old and persistent notion is that Eusthenopteron was able to crawl onto land using its fins. However, there is no evidence actually supporting this idea. All tristichopterids went extinct by the end of Late Devonian.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN