A New Stem Parrot from the Green River Formation and the Complex Evolution of the Grasping Foot in Pan-Psittaciformes

@inproceedings{Ksepka2012ANS,
  title={A New Stem Parrot from the Green River Formation and the Complex Evolution of the Grasping Foot in Pan-Psittaciformes},
  author={Daniel T. Ksepka and Julia A. Clarke},
  year={2012}
}
ABSTRACT Deposits from the Fossil Butte Member of the Green River Formation preserve exceptional fossils from one of the most diverse Paleogene avifaunas worldwide. Stem lineage parrots are well represented in this avifauna. Here we report a new species of Pan-Psittaciformes (crown clade parrots and their stem lineage relatives). The new species shares several features with extant parrots that are not present in the contemporaneous clades Halcyornithidae and Messelasturidae, including a wider… Expand
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References

SHOWING 1-10 OF 174 REFERENCES
Stem Parrots (Aves, Halcyornithidae) from the Green River Formation and a Combined Phylogeny of Pan-Psittaciformes
TLDR
Fossil evidence is consistent with a more recent origin of crown clade Psittaciformes than predicted from divergence dating analyses, and supports environmental shifts and dispersal as key drivers in parrot biogeography. Expand
A new parrot from the Miocene of Germany, with com- ments on the variation of hypotarsus morphology in some Psittaciformes
TLDR
This study provides the first detailed survey on the variation of hypotarsus mor- phology within extant Psittaciformes and describes a derived hypotarsal structure that supports monophyly of a clade including the genera Psephotus, Eunymphicus, Cyanoramphus, Northiella, Prosopeia, Barnardius, Platycercini, and Melopsittacus. Expand
Combined phylogenetic analysis of a new North American fossil species confirms widespread Eocene distribution for stem rollers (Aves, Coracii)
TLDR
A nearly complete skeleton of a new species of stem roller from the early Eocene Green River Formation of North America is reported, providing evidence of further ecological diversity in early stem Coracii and convergence on crown morphologies. Expand
On the osteology and phylogenetic affinities of the Pseudasturidae–Lower Eocene stem-group representatives of parrots (Aves, Psittaciformes)
TLDR
Derived osteological characters which are visible in newly recognized specimens from the Lower Eocene London Clay of England most convincingly support classification of the Pseudasturidae into the Psittaciformes (parrots). Expand
Well-preserved new skeleton of the Middle Eocene Messelastur substantiates sister group relationship between Messelasturidae and Halcyornithidae (Aves, ?Pan-Psittaciformes)
TLDR
The specimen further shows that the Messelasturidae are the sister taxon of the early Eocene Halcyornithidae (‘Pseudastur family’), which are considered to be stem group representatives of the Psittaciformes. Expand
Primobucco mcgrewi (Aves: Coracii) from the Eocene Green River Formation: New Anatomical Data from the Earliest Constrained Record of Stem Rollers
ABSTRACT The Eocene Green River Formation provides one of the richest records of fossil birds worldwide. As part of a reevaluation of this avifauna, we describe 12 new specimens of the stem rollerExpand
Phylogenetic Analysis of Pelecaniformes (Aves) Based on Osteological Data: Implications for Waterbird Phylogeny and Fossil Calibration Studies
TLDR
Relationships of extant pelecaniforms inferred from morphology are more congruent with molecular phylogenies than previously assumed, though notable conflicts remain. Expand
THE POSTCRANIAL OSTEOLOGY AND PHYLOGENETIC POSITION OF THE MIDDLE EOCENE MESSELASTUR GRATULATOR PETERS, 1994—A MORPHOLOGICAL LINK BETWEEN OWLS (STRIGIFORMES) AND FALCONIFORM BIRDS?
TLDR
The Messelasturidae provide a morphological link between Strigiformes and Falconiformes (diurnal birds of prey), and support the highly disputed falconiform affinities of owls in combining derived tibiotarsus and tarsometatarsus characters of owl with a more plesiomorphic, ‘falcon-’ or ‘hawk-like', skull morphology. Expand
Quercypsitta-Like Birds from the Early Eocene of India (Aves, ?Psittaciformes)
TLDR
It is concluded that, at least concerning the arboreal taxa, the early Eocene avifauna of India shows some concordances with the much better known one from the late Eocene of Europe, and is assigned to a new family, Vastanavidae. Expand
Eocene tortoise beetles from the Green River Formation in Colorado, U.S.A. (Coleoptera: Chrysomelidae: Cassidinae)
TLDR
Two of the oldest definitive tortoise beetle fossils are reported, from the Eocene Green River Formation in northwestern Colorado, which are the oldest yet to document the specialized morphology associated with the transition in cassidine feeding and immature biology. Expand
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