Published May 31, 2003 | Version v1
Taxonomic treatment Open

Euparkeria capensis Broom 1913

Description

Euparkeria capensis Broom, 1913

Age. Scythian-Anisian.

Occurrence. Cynognathus assemblage zone of the Beaufort Group, South Africa.

Diagnosis. Premaxilla with a vertical, dorsally rounded postnarial process.

Remarks. Ever since its original description (Broom 1913), Euparkeria (Text-fig. 4a) has played a pivotal role in the discussion of archosaur interrelationships. Long believed to be ancestral to dinosaurs and sometimes birds (Heilmann 1926; Welman 1995), it is now generally considered to be the sister group of the clade comprising all the recent representatives of Archosauria (see Gower and Wilkinson 1996 and references therein). Because of this basal phylogenetic position, its unspecialized morphology and our relatively complete knowledge of its anatomy, Euparkeria is used here as the most basal outgroup to dinosaurs, and it is the taxon used to root the tree.

Notes

Published as part of Rauhut, Oliver W. M., 2003, The interrelationships and evolution of basal theropod dinosaurs, pp. 1-213 in Special papers in palaeontology 69 on page 12, DOI: 10.5281/zenodo.3382576

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Linked records

Additional details

Biodiversity

Family
Euparkeriidae
Genus
Euparkeria
Kingdom
Animalia
Order
Prolacertiformes
Phylum
Chordata
Scientific name authorship
Broom
Species
capensis
Taxon rank
species
Taxonomic concept label
Euparkeria capensis Broom, 1913 sec. Rauhut, 2003

References

  • BROOM, R. 1913. Note on Mesosuchus browni, Watson, and on a new South African riassic pseudosuchian (Euparkeria capensis). Records of the Albany Museum, 2, 394 - 396.
  • HEILMANN, G. 1926. The origin of birds. H. F. & G. Witherby, London, 210 pp.
  • WELMAN, J. 1995. Euparkeria and the origin of birds. South African Journal of Science, 91, 533 - 537.