An exceptional Devonian fish from Australia sheds light on tetrapod origins

  title={An exceptional Devonian fish from Australia sheds light on tetrapod origins},
  author={John A. Long and Gavin Young and Timothy Holland and Timothy John Senden and Erich M. G. Fitzgerald},
The transition from fishes to tetrapods was one of the most dramatic events in the evolution of vertebrates, but many pivotal fossils are incomplete, resulting in gaps in the data that are used for phylogenetic reconstruction. Here we present new observations from the most complete, acid-prepared Devonian tetrapodomorph fish yet discovered, Gogonasus, which was previously placed just crownward of Kenichthys and rhizodontids, the most primitive taxa on the tetrapod lineage. Unexpectedly… 

Baraminological analysis of Devonian and Carboniferous tetrapodomorphs

According to evolutionary theory, the origin of tetrapods (or limbed vertebrates) from a fish-like ancestor during the Devonian Period was one of the major events in the history of life. Devonian

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A large, lobe-finned fish from the Late Devonian of China disrupts previously accepted stem-tetrapod phylogeny and reveals parallel evolution within the lineage, suggesting that ecological diversity and biogeographical provinciality in the tetrapod stem group have been underestimated.

Non-marine palaeoenvironment associated to the earliest tetrapod tracks

A new palaeoenvironmental interpretation of the track-bearing interval from Zachełmie is presented, showing that it represents a succession of ephemeral lakes with a restricted and non-marine biota, rather than a marginal marine environment as originally thought.

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A new cosmine-covered, tetrapodomorph fish Owensia chooi gen. et sp. nov. is described, based on a near-complete, uncrushed ethmosphenoid from the Middle Devonian sediments (Kevington Creek

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On the phylogenetic position of Gogonasus andrewsae Long 1985, within the Tetrapodomorpha

New phylogenetic analyses of the Tetrapodomorpha show a revised phylogenetic position of Gogonasus as being deeply nested within the Tetrapsidium, crownward of Osteolepis and Megalichthys, but basal to Eusthenopteron+‘elpistostegalids’.

A new actinopterygian from the Late Devonian Gogo Formation, Western Australia

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Rise of the Earliest Tetrapods: An Early Devonian Origin from Marine Environment

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Sarcopterygians: From Lobe-Finned Fishes to the Tetrapod Stem Group

The sarcopterygians or lobe-finned fishes is the group that gave rise to tetrapod-like forms from the Late Devonian, and the braincases of dipnoans (lungfishes) were the most highly modified with consolidated fore and aft portions and reduction or loss of the hyomandibula.



A near‐tetrapod from the Baltic Middle Devonian

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Osteolepiforms and the ancestry of tetrapods

The supposedly discredited idea of osteolepiforms as tetrapod ancestors is supported by the first detailed analysis of the lower part of the Tetrapodomorpha, based on 99 characters scored for 29 taxa.

A Devonian tetrapod-like fish and the evolution of the tetrapod body plan

The discovery of a well-preserved species of fossil sarcopterygian fish from the Late Devonian of Arctic Canada that represents an intermediate between fish with fins and tetrapods with limbs, and provides unique insights into how and in what order important tetrapod characters arose is reported.

Elginerpeton pancheni and the earliest tetrapod clade

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The First Tetrapod Finds from the Devonian (Upper Famennian) of Latvia

The lower jaw of Ventastega is strikingly primitive in retaining fangs on the coronoid series, but shares many characters with those of other known Devonian tetrapods, and some of these features are interpreted as basal tetrapod synapomorphies.

Tetrapod-like middle ear architecture in a Devonian fish

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Devonian rhizodontids and tristichopterids (Sarcopterygii; Tetrapodomorpha) from East Gondwana

  • Z. JohansonP. Ahlberg
  • Biology, Environmental Science
    Transactions of the Royal Society of Edinburgh: Earth Sciences
  • 2001
It is argued that the Rhizodontida evolved on the Gondwanan landmass, and notorhizodon occupies a relatively derived position within the Tristichopteridae, but is contemporary with the earliest and phylogenetically most basal Laurussian members of the group.

An articulated phyllolepid fish (Placodermi) from the Devonian of central Australia: implications for non-marine connections with the Old Red Sandstone continent

  • Gavin Young
  • Environmental Science, Geography
    Geological Magazine
  • 2005
A second species of the placoderm genus Placolepis (Pl. harajica sp. nov.), based on a single articulated specimen from Givetian–Frasnian strata in the MacDonnell Ranges, demonstrates the occurrence

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The discovery of the first Devonian tetrapod from Asia is reported, a finding that substantially extends the geographical range of these animals and raises new questions about their dispersal.


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