Stem Parrots (Aves, Halcyornithidae) from the Green River Formation and a Combined Phylogeny of Pan-Psittaciformes

@inproceedings{Ksepka2011StemP,
  title={Stem Parrots (Aves, Halcyornithidae) from the Green River Formation and a Combined Phylogeny of Pan-Psittaciformes},
  author={Daniel T. Ksepka and Julia A. Clarke and Lance. Grande},
  booktitle={Journal of Paleontology},
  year={2011}
}
Abstract A new species of stem parrot is reported from the early Eocene Fossil Butte Member of the Green River Formation. Well-preserved specimens including a complete skeleton and referred partial postcranial skeleton reveal new osteological details of the clade Halcyornithidae and expand the known diversity of the Green River avifauna. Cyrilavis colburnorum n. sp. shares key morphologies with the smaller Green River halcyornithid Cyrilavis olsoni. A combined phylogenetic analysis of Pan… 
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A New Stem Parrot from the Green River Formation and the Complex Evolution of the Grasping Foot in Pan-Psittaciformes

A new species of Pan-Psittaciformes (crown clade parrots and their stem lineage relatives) is reported that shares several features with extant parrots that are not present in the contemporaneous clades Halcyornithidae and Messelasturidae, including a wider pelvis, deeper trochlea cartilaginis tibialis, and larger pygostyle.

Podargiform Affinities of the Enigmatic Fluvioviridavis platyrhamphus and the Early Diversification of Strisores (“Caprimulgiformes” + Apodiformes)

The well-preserved mandible and palate of the new specimen demonstrate that many of the unique characteristics of the skull that characterize the crown frogmouth clade Podargidae arose early in the evolutionary history of the clade, over 50 million years ago.

A reassessment of Eocene parrotlike fossils indicates a previously undetected radiation of zygodactyl stem group representatives of passerines (Passeriformes)

The present analysis corroborates the hypothesis of a zygodactyl stem species of passerines and assigns Psittacopes to a new higher‐level taxon and a new name is also introduced for the clade including Zygodactsylidae and Passeriformes.

Systematics and phylogeny of the Zygodactylidae (Aves, Neognathae) with description of a new species from the early Eocene of Wyoming, USA

The fossil record of Zygodactylidae from North America is reviewed and five new well-preserved fossils from the early Eocene Green River Formation of Wyoming are described, including two specimens identified as representing a new species and the first records of the taxon Zy godactylus outside Europe.

A partial skeleton of a new species of Tynskya Mayr, 2000 (Aves, Messelasturidae) from the London Clay highlights the osteological distinctness of a poorly known early Eocene “owl/parrot mosaic”

Three-dimensionally preserved bones of a new species of Tynskya, T. waltonensis, are reported from the London Clay of Walton-on-the-Naze and provide new insights into the skeletal morphology of messelasturids.

Two new parrot species (Psittaciformes) from the early Pliocene of Langebaanweg, South Africa, and their palaeoecological implications

Evidence for parrots in general, and a putative graminivorous species of lovebird in particular, indicates that woodlands as well as grasslands were present at Langebaanweg during the early Pliocene, which is consistent with current hypotheses on the palaeoenvironment at and around this site.

New specimens of the early Eocene bird Vastanavis and the interrelationships of stem group Psittaciformes

A morphologically distinctive distal humerus of a small bird resembling the stem group nyctibiid Paraprefica, which was discovered in the most recent excavation in Vastan Lignite Mine, is discovered.

A new Paleogene fossil and a new dataset for waterfowl (Aves: Anseriformes) clarify phylogeny, ecological evolution, and avian evolution at the K-Pg Boundary

Results indicate that Anseriformes were likely ancestrally aquatic herbivores with rhamphothecal lamellae and provide insight into avian evolution during and following the K-Pg mass extinction.

The Evolution and Fossil Record of Palaeognathous Birds (Neornithes: Palaeognathae)

The extant diversity of the avian clade Palaeognathae is composed of the iconic flightless ratites (ostriches, rheas, kiwi, emus, and cassowaries), and the volant tinamous of Central and South…

The origins of crown group birds: molecules and fossils

  • G. Mayr
  • Environmental Science, Biology
  • 2014
It is shown how new sequence‐based phylogenies may shed light on the relationships of fossils with an unexpected character mosaic, and how such fossils can improve the understanding of character evolution in morphologically disparate avian taxa.

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