Earliest Carboniferous tetrapod and arthropod faunas from Scotland populate Romer's Gap

@article{Smithson2012EarliestCT,
  title={Earliest Carboniferous tetrapod and arthropod faunas from Scotland populate Romer's Gap},
  author={Timothy R. Smithson and S. P. Wood and John E. A. Marshall and Jennifer Alice Clack},
  journal={Proceedings of the National Academy of Sciences},
  year={2012},
  volume={109},
  pages={4532 - 4537}
}
Devonian tetrapods (limbed vertebrates), known from an increasingly large number of localities, have been shown to be mainly aquatic with many primitive features. In contrast, the post-Devonian record is marked by an Early Mississippian temporal gap ranging from the earliest Carboniferous (Tournaisian and early Viséan) to the mid-Viséan. By the mid-Viséan, tetrapods had become effectively terrestrial as attested by the presence of stem amniotes, developed an essentially modern aspect, and given… 

Figures from this paper

A fish and tetrapod fauna from Romer's Gap preserved in Scottish Tournaisian floodplain deposits

The end‐Devonian mass extinction has been framed as a turning point in vertebrate evolution, enabling the radiation of tetrapods, chondrichthyans and actinopterygians. Until very recently ‘Romer's

A new Mississippian tetrapod from Fife, Scotland, and its environmental context

The discovery of a new Visean site in Fife, Scotland, of Asbian age is announced, and from it a new species of the baphetoid Spathicephalus is described, which is probably one of the earliest tetrapod groups to use suction feeding on small, aquatic prey.

A lungfish survivor of the end-Devonian extinction and an Early Carboniferous dipnoan radiation

Until recently the immediate aftermath of the Hangenberg event of the Famennian Stage (Upper Devonian) was considered to have decimated sarcopterygian groups, including lungfish, with only two taxa,

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

A Diverse Tetrapod Fauna at the Base of 'Romer's Gap'

The fossils from Blue Beach demonstrate that when windows into the fauna of ‘Romer’s Gap’ are found a rich diversity of tetrapods will be shown to be present, contra arguments that suggested this hiatus in the fossil record was due to extrinsic factors such as atmospheric oxygen levels.

A Tournaisian (earliest Carboniferous) conglomerate-preserved non-marine faunal assemblage and its environmental and sedimentological context

The richness of the fauna runs counter to the assumption of a depauperate nonmarine fauna following the end-Devonian Hangenberg event, and charcoal content highlights the occurrence of fire, with the requisite levels of atmospheric oxygen during that stage.

Phylogenetic and environmental context of a Tournaisian tetrapod fauna

It is shown that atmospheric oxygen levels were stable across the Devonian/Carboniferous boundary, and did not inhibit the evolution of terrestriality, which suggests that tetrapod diversification was well established by the Tournaisian.

A lower Carboniferous (Visean) tetrapod trackway represents the earliest record of an edopoid amphibian from the UK

The ichnological fossil record has previously provided key evidence for the diversification of land vertebrates (tetrapods) during the Carboniferous Period, following the invasion of the land. Within

Lungfish diversity in Romer's Gap: reaction to the end‐Devonian extinction

Romer's Gap, the interval following the end‐Devonian extinction event, has been described as a post‐extinction trough for vertebrates. It is a time roughly equivalent to the Tournaisian stage of the

A complete insect from the Late Devonian period

The first complete Late Devonian insect is reported, which was probably a terrestrial species and demonstrates further a first Devonian phase of diversification for the Hexapoda, as in vertebrates, and suggests that the Pterygota diversified before and during Romer’s gap.
...

References

SHOWING 1-10 OF 53 REFERENCES

An amniote-like skeleton from the Early Carboniferous of Scotland

A small, highly ossified, postcranial skeleton of a terrestrially adapted, amniote-like tetrapod from the Mid Viséan is reported, which shows the earliest known pentadactyl manus and pushes back the known occurrence of terrestrial vertebrates closer to the origin of tetrapods.

An early tetrapod from ‘Romer's Gap’

Pederpes is the earliest-known tetrapod to show the beginnings of terrestrial locomotion and was at least functionally pentadactyl, bridging the temporal, morphological and phylogenetic gaps that have hitherto separated Late Devonian and mid-Carboniferous tetrapOD faunas.

A new Early Carboniferous tetrapod with a mélange of crown-group characters

  • J. Clack
  • Biology, Environmental Science
    Nature
  • 1998
A new taxon is described from this locality that not only combines characters of each lineage, but also represents the basal member of a third Palaeozoic group, the baphetids.

Pederpes finneyae, an articulated tetrapod from the tournaisian of Western Scotland

The postcranial skeleton of Pederpes shows several unique features, including the structure of the leading edges of the cleithrum and clavicle, the form of the rib flanges and a possible supernumerary digit on the manus.

Late Devonian tetrapod remains from Red Hill, Pennsylvania, USA: how much diversity?

The difficulty in making taxonomic associations with isolated remains, even when found in close proximity to one another is demonstrated, and exploration of the characteristics of each element demonstrates the presence of at least three early tetrapod taxa at the Red Hill site.

Ever Since Owen: Changing Perspectives on the Early Evolution of Tetrapods

Research emphasis can now shift to broader-based questions, including the whole of the early tetrapod radiation, from the divergence from other lobed-finned fishes to the origins of modern amphibians and amniotes.

The Ancestry of Reptiles

The ancestry of captorhinomorph reptiles from the gephyrostegid anthracosaurs can be firmly established and the nature of the amphibian-reptilian transition must be studied on the basis of relicts of earlier groups which are contemporary with true reptiles.

The Carboniferous Amphibian Proterogyrinus scheelei Romer, and the Early Evolution of Tetrapods

Proterogyrinus scheelei Romer, from the Upper Mississippian of Greer, West Virginia, is one of the earliest known members of the amphibian infraorder Embolomeri, and has no undisputed synapomorphies with reptiles either, making it impossible to support close relationship between the two groups.

On the Amphibian Crassigyrinus scoticus Watson from the Carboniferous of Scotland

A case is made for the 'sister-group' relation of Crassigyrinus to the anthracosauroids and a cladogram presented of the subgroups involved; it is, however, difficult to make a case for the close relationship of CrASSIGyrinus and the Seymouriamorpha and the closeness of relationship of the latter to anthracosaurs is questioned.

A new Lower Carboniferous flora from East Lothian, Scotland

...