C. A. Walker

Publications37
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Citations702
Highly Influential Citations81
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New subclass of birds from the Cretaceous of South America
  • C. A. Walker
  • Environmental Science, Biology
    Nature
  • 1 July 1981
Current classification of birds recognizes three subclasses which are morphologically distinct: the Archaeornithes for Archaeopteryx, the Odontornithes for the Hesperornithiformes and the…
THE SKULL OF THE SOLEMYDID TURTLE HELOCHELYDRA NOPCSAI FROM THE EARLY CRETACEOUS OF THE ISLE OF WIGHT (UK) AND A REVIEW OF SOLEMYDIDAE
TLDR
A series of typological taxon defini- tions that utilize shell sculpturing and retrieve consistent classes of fragments that originate from specific geological formations are developed to help clarify the palaeoecology of solemydid turtles.
SANDOWNIA HARRISI, A HIGHLY DERIVED TRIONYCHOID TURTLE (TESTUDINES: CRYPTODIRA) FROM THE EARLY CRETACEOUS OF THE ISLE OF WIGHT, ENGLAND
TLDR
This specimen is one of the oldest known cryptodiran turtles that nests within the living families (the Polycryptodira) and suggests that the deep divergences among theliving families of the Cryptodira occurred more than 110 million years ago.
Euenantiornithine birds from the late Cretaceous of El Brete (Argentina)
TLDR
A taxonomic illustrated review of the Late Cretaceous fossil birds known from the Argentine locality of El Brete is presented here for the first time, and a new fossil euenantiornithine is described and documented in this paper (Elbretornis).
Birds of the British Upper Eocene
The fossil birds of the British Upper Eocene are re-examined, further species are described, and additional material referred to existing species. Seeley's Macrornis tanaupus appears to be non-avian.…
New Records of Fossil ‘Waterbirds’ from the Miocene of Kenya
TLDR
Comparisons with other known sites of this age across northern Africa, the Mediterranean and northern Pakistan suggest that Miocene waterbird faunas in this region were very similar in their compositions.
A new shearwater from the pleistocene of the canary islands and its bearing on the evolution of certain puffinus shearwaters
An extinct species of fossil shearwater (Puffinus holei sp. nov.), referable to the subgenus Puffinus, is described from the sand dune complex of the Jandia Peninsula, Fuerteventura, Canary Islands.…
Large euenantiornithine birds from the Cretaceous of southern France, North America and Argentina
Abstract We review historical approaches to the systematics of Enantiornithes, the dominant birds of the second half of the Mesozoic, and describe the forelimb remains of a new Cretaceous…
New records of fossil birds from the Pliocene of Kallo, Belgium
TLDR
This collection of fossil birds comprises part of the first Pliocene avifauna to be described from Belgium and appears to be remarkably consistent in its composition to deposits of the same age in North America.
Archaeopteryx Is Not a Forgery
TLDR
Proof of authenticity is provided by exactly matching hairline cracks and dendrites on the feathered areas of the opposing slabs, which show the absence of the artificial cement layer into which modern feathers could have been pressed by a forger.
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