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

@article{Anderson2015ADT,
  title={A Diverse Tetrapod Fauna at the Base of 'Romer's Gap'},
  author={Jason S. Anderson and Timothy R. Smithson and Chris F. Mansky and Taran Elizabeth Meyer and Jennifer Alice Clack},
  journal={PLoS ONE},
  year={2015},
  volume={10}
}
The lack of fossil tetrapod bearing deposits in the earliest Carboniferous (‘Romer’s Gap’) has provoked some recent discussions regarding the proximal cause, with three explanations being offered: environmental, taphonomic, and collection failure. One of the few, and earliest, windows into this time is the locality of Blue Beach exposed in the Tournaisian deposits at Horton Bluff lying along the Avon River near Hantsport, Nova Scotia, Canada. This locality has long been known but, because the… 

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 terrestrial millipede fauna of earliest Carboniferous (Tournaisian) age from southeastern Scotland helps fill ‘Romer's Gap'

The diverse fauna recovered from the earliest Carboniferous Ballagan Formation of the Scottish Borders supports the theory that an apparent lack of terrestrial animal fossils from ‘Romer's Gap' was due to a lack of collecting and suitable deposits, rather than to low oxygen levels as previously suggested.

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.

New embolomerous tetrapod material and a faunal overview of the Mississippian-aged Point Edward locality, Nova Scotia, Canada

Embolomerous tetrapods, moderately-sized to large aquatic predators, form a major faunal constituent of Permo-Carboniferous tetrapod communities. Embolomeres are recognized by their distinct

A platysomid occurrence from the Tournaisian of Nova Scotia

Platysomid occurrence from the Tournaisian of Nova Scotia, Canada represents the earliest known occurrence of one such fish and suggests that early Carboniferous actinopterygians were morphologically, ecologically, and functionally diverse.

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

A partial lower jaw of a tetrapod from “Romer's Gap”

ABSTRACT The first half of the Mississippian or Early Carboniferous (Tournaisian to mid- Viséan), an interval of about 20 million years, has become known as “Romer's Gap” because of its poor tetrapod

The smallest known Devonian tetrapod shows unexpectedly derived features

Brittagnathus is described from a single complete right lower jaw ramus recovered from the Acanthostega mass-death deposit in the upper part of the Britta Dal Formation of Stensiö Bjerg, Gauss Peninsula, East Greenland and suggests that diversification of ‘Carboniferous-grade’ tetrapods had already begun before the end of the Devonian and that the group was not greatly affected by the end-Devonian mass extinction.

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,
...

References

SHOWING 1-10 OF 86 REFERENCES

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

It is concluded that the gap in the fossil record has been an artifact of collection failure and a series of discoveries of Tournaisian-age localities in Scotland that have yielded a wealth of new tetrapod and arthropod fossils.

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.

A Colosteid-Like Early Tetrapod from the St. Louis Limestone (Early Carboniferous, Meramecian), St. Louis, Missouri, USA

Abstract We report the discovery of an early tetrapod skull from the St. Louis Limestone of Missouri, USA. It was found among a collection of coelacanths in the Museum für Naturkunde in Berlin,

Donald Baird and his discoveries of Carboniferous and early Mesozoic vertebrates in Nova Scotia

Donald Baird (1926–2011), an influential and innovative vertebrate paleontologist with a scientific career spanning nearly 50 years, had an exceptional breadth of expertise in the study of late

Confirmation of Romer's Gap as a low oxygen interval constraining the timing of initial arthropod and vertebrate terrestrialization

It is argued that geochronologic range data of terrestrial arthropods show a pattern similar to that of vertebrates, and Romer's Gap is real, occupied an interval from 360 million years before present (MYBP) to 345 MYBP, and occurred when environmental conditions were unfavorable for air-breathing, terrestrial animals.

A uniquely specialized ear in a very early tetrapod

Ichthyostega's braincase and ear region defied interpretation, such that conventional anatomical terms seemed inapplicable, and can now be seen to form part of a highly specialized ear, probably a hearing device for use in water.

Devonian climate change, breathing, and the origin of the tetrapod stem group.

  • J. Clack
  • Environmental Science, Geography
    Integrative and comparative biology
  • 2007
The diversification of the tetrapod stem group occurred during the late Middle through the Late Devonian, that is from the Givetian to Famennian stages about 385-365 million years ago, and plant diversification was at its most rapid, changing the character of the landscape and contributing, via soils, soluble nutrients, and decaying plant matter, to anoxia in all water systems.

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.

XII.—The Postcranial Skeleton of Rhipidistian Fishes Excluding Eusthenopteron

The postcranial remains of other Rhipidistia are now described as far as they are known, and comparisons are made with Eusthenopteron and other forms where relevant, and possible modes of function are considered.

Global patterns of diversification in the history of modern amphibians

A phylogenetic timetree based on a multigene data set of 3.75 kb for 171 species reveals several episodes of accelerated amphibian diversification, which do not fit models of gradual lineage accumulation.
...