Gérald Mayr
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View article: A Derived Morphology of the Quadrate May Support a Previously Unrecognized Major Higher‐Level Clade of Neoavian Birds
A Derived Morphology of the Quadrate May Support a Previously Unrecognized Major Higher‐Level Clade of Neoavian Birds Open
The avian quadrate plays a critical role in cranial kinesis, but few comparative studies exist of its morphological variation across higher‐level taxa. The present paper surveys the occurrence of a markedly concave articular facet of the c…
View article: A remarkable beak morphology in a bird skull from the Eocene of Messel (Germany) signifies unusual feeding specializations
A remarkable beak morphology in a bird skull from the Eocene of Messel (Germany) signifies unusual feeding specializations Open
We report the skull of a new avian species from the latest early or earliest middle Eocene fossil site Messel in Germany. Aenigmatorhynchus rarus, gen. et sp. nov. is characterized by a long, straight, and pointed beak, as well as a mandib…
View article: Leg bones of the anseriform taxon Nettapterornis from the London Clay of Walton-on-the-Naze and notes on the bony-toothed birds from this locality
Leg bones of the anseriform taxon Nettapterornis from the London Clay of Walton-on-the-Naze and notes on the bony-toothed birds from this locality Open
We report the first leg bones of the anseriform bird Nettapterornis (“ Anatalavis ”) oxfordi from the type locality of the species, the early Eocene London Clay of Walton-on-the-Naze (Essex, UK). In order to exclude the possibility that th…
View article: Two new species of larger gruiform and charadriiform birds from the London Clay of Walton-on-the-Naze (Essex, UK)
Two new species of larger gruiform and charadriiform birds from the London Clay of Walton-on-the-Naze (Essex, UK) Open
We report two larger gruiform and charadriiform birds from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK). Leg bones of a new species of the gruiform Parvigruidae are described as ? Parvigrus ypresiensis , sp. nov. and show…
View article: The Lithornithiformes (Aves) from the early Eocene London Clay of Walton‐on‐the‐Naze (Essex, UK)
The Lithornithiformes (Aves) from the early Eocene London Clay of Walton‐on‐the‐Naze (Essex, UK) Open
We describe multiple partial skeletons and isolated bones of the palaeognathous Lithornithiformes from the early Eocene London Clay of Walton‐on‐the‐Naze (Essex, UK). The well‐preserved specimens are assigned to at least four species of th…
View article: OP26 Disentangling the role of HLA proteins in shaping the T-cell repertoire in Inflammatory Bowel Disease using CDR3-QTL analysis
OP26 Disentangling the role of HLA proteins in shaping the T-cell repertoire in Inflammatory Bowel Disease using CDR3-QTL analysis Open
Background The HLA region leads in the number of the strongest genetic associations for chronic immune-mediated diseases, including Inflammatory Bowel Disease1. Despite decades of research, the role of HLA in modulating chronic T cell-medi…
View article: The true identity of the strigiform species Ninox dubiosa Weick, 2006, with comments on a skull feature shared by the Ieraglaucinae and Surniinae
The true identity of the strigiform species Ninox dubiosa Weick, 2006, with comments on a skull feature shared by the Ieraglaucinae and Surniinae Open
We revisit the holotype of Ninox dubiosa Weick, 2006, and show the species to be a junior synonym of the White-throated Screech Owl, Megascops albogularis (Cassin, 1849). Micro-CT scans of the specimen reveal the absence of a dorsal proces…
View article: Messelornithids and messelornithid-like birds from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK)
Messelornithids and messelornithid-like birds from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK) Open
We describe gruiform and gruiform-like birds from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK). One species belongs to the Messelornithidae and is classified as Nasiornis messelornithoides nov. gen., nov. sp.; the coracoi…
View article: The non-apodiform Strisores (potoos, nightjars and allied birds) from the early Eocene London Clay of Walton-on-the-Naze
The non-apodiform Strisores (potoos, nightjars and allied birds) from the early Eocene London Clay of Walton-on-the-Naze Open
Fossils of the avian clade Strisores (nightjars, swifts and allies) are well represented in some early Eocene localities. These birds were also taxonomically diverse in the British London Clay, but most of the previously described fossil…
View article: New fossils of <i>Eocypselus</i> and <i>Primapus</i> from the British London Clay reveal a high taxonomic and ecological diversity of early Eocene swift‐like apodiform birds
New fossils of <i>Eocypselus</i> and <i>Primapus</i> from the British London Clay reveal a high taxonomic and ecological diversity of early Eocene swift‐like apodiform birds Open
We describe new specimens and species of apodiform birds from the early Eocene London Clay of Walton‐on‐the Naze (Essex, UK). In addition to multiple partial skeletons of Eocypselus vincenti Harrison, 1984, three new species of Eocypselus …
View article: A large frigatebird-like tarsometatarsus from the London Clay of Walton-on-the-Naze (Essex, UK) may shed light on the affinities of a poorly known early Eocene seabird taxon
A large frigatebird-like tarsometatarsus from the London Clay of Walton-on-the-Naze (Essex, UK) may shed light on the affinities of a poorly known early Eocene seabird taxon Open
We report a tarsometatarsus and an associated pedal phalanx from the lower Eocene London Clay of Walton-on-the- Naze (Essex, UK). The specimen resembles the tarsometatarsus of the taxon Limnofregata (Fregatidae), but it belongs to a specie…
View article: Reinterpretation of tuberculate cervical vertebrae of Eocene birds as an exceptional anti‐predator adaptation against the mammalian craniocervical killing bite
Reinterpretation of tuberculate cervical vertebrae of Eocene birds as an exceptional anti‐predator adaptation against the mammalian craniocervical killing bite Open
We report avian cervical vertebrae from the Quercy fissure fillings in France, which are densely covered with villi‐like tubercles. Two of these vertebrae stem from a late Eocene site, another lacks exact stratigraphic data. Similar cervic…
View article: The galliform birds from the Lower Eocene London Clay of Walton-on-the-Naze (Essex, U.K.): New species suggest faunal connections to Asia
The galliform birds from the Lower Eocene London Clay of Walton-on-the-Naze (Essex, U.K.): New species suggest faunal connections to Asia Open
We report stem group Galliformes from the lower Eocene (Ypresian) London Clay of Walton-on-the-Naze (Essex, U.K.), which are among the oldest known fossils of galliform birds. The specimens are assigned to two new species, ?Paraortygoides …
View article: Partial skeleton from the Paleocene of New Zealand illuminates the early evolutionary history of the Phaethontiformes (tropicbirds)
Partial skeleton from the Paleocene of New Zealand illuminates the early evolutionary history of the Phaethontiformes (tropicbirds) Open
We describe a new stem group representative of the Phaethontiformes (tropicbirds) from the Paleocene Waipara Greensand in New Zealand. The fossil consists of a partial skeleton with a nearly complete skull and represents the first unambigu…
View article: Comparative morphology of the avian bony columella
Comparative morphology of the avian bony columella Open
In birds, the columella is the only bony element of the sound conducting apparatus, conveying vibrations of the cartilaginous extracolumella to the fluid of the inner ear. Although avian columellar morphology has attracted some attention o…
View article: Narrow-beaked trogons from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK)
Narrow-beaked trogons from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK) Open
We describe multiple partial skeletons of a new trogon species from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK), which are among the oldest fossils of the Trogoniformes. Eotrogon stenorhynchus , gen. et sp. nov. has a mu…
View article: Multiple skeletons of Rhynchaeites from the London Clay reveal the osteology of early Eocene ibises (Aves, Threskiornithidae)
Multiple skeletons of Rhynchaeites from the London Clay reveal the osteology of early Eocene ibises (Aves, Threskiornithidae) Open
We describe a new species of Rhynchaeites from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK), which is represented by a partial skeleton comprising a skull and most major postcranial bones. Multiple further partial skeleto…
View article: A new fossil from the London Clay documents the convergent origin of a “mousebird-like” tarsometatarsus in an early Eocene near-passerine bird
A new fossil from the London Clay documents the convergent origin of a “mousebird-like” tarsometatarsus in an early Eocene near-passerine bird Open
We describe a partial skeleton of a small bird from the lower Eocene London Clay of Walton-on-the-Naze (Essex, UK), which shows close affinities to two phylogenetically controversial early Paleogene taxa, Morsoravis sedilis (lower Eocene o…
View article: New species from the early Eocene London Clay suggest an undetected early Eocene diversity of the Leptosomiformes, an avian clade that includes a living fossil from Madagascar
New species from the early Eocene London Clay suggest an undetected early Eocene diversity of the Leptosomiformes, an avian clade that includes a living fossil from Madagascar Open
We report the first records of the leptosomiform taxon Plesiocathartes from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK). Two species could be distinguished, one of which is described as Plesiocathartes insolitipes , sp. …
View article: Psittacopedids and zygodactylids: The diverse and species-rich psittacopasserine birds from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK)
Psittacopedids and zygodactylids: The diverse and species-rich psittacopasserine birds from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK) Open
The Daniels collection of fossil birds from the early Eocene London Clay of Walton-on-the-Naze (Essex, UK) contains multiple specimens of the Psittacopedidae and Zygodactylidae, which are here for the first time studied in detail. The Psit…
View article: A tarsometatarsus from the upper Eocene Na Duong Basin—the first Palaeogene fossil bird from Vietnam
A tarsometatarsus from the upper Eocene Na Duong Basin—the first Palaeogene fossil bird from Vietnam Open
Knowledge of the Palaeogene avifauna of East Asia is scarce, and only a few fossils have been described thus far. A tarsometatarsus from the upper Eocene Na Duong Basin represents the first Palaeogene fossil bird from Vietnam. The fossilif…
View article: The exquisitely preserved integument of Psittacosaurus and the scaly skin of ceratopsian dinosaurs
The exquisitely preserved integument of Psittacosaurus and the scaly skin of ceratopsian dinosaurs Open
The Frankfurt specimen of the early-branching ceratopsian dinosaur Psittacosaurus is remarkable for the exquisite preservation of squamous (scaly) skin and other soft tissues that cover almost its entire body. New observations under Laser-…
View article: Early Eocene fossil illuminates the ancestral (diurnal) ecomorphology of owls and documents a mosaic evolution of the strigiform body plan
Early Eocene fossil illuminates the ancestral (diurnal) ecomorphology of owls and documents a mosaic evolution of the strigiform body plan Open
We describe a partial skeleton of a fossil owl (Strigiformes) from the early Eocene London Clay of Walton‐on‐the‐Naze (Essex, UK). The holotype of Ypresiglaux michaeldanielsi , gen. et sp. nov. is one of the most complete specimens of a Pa…