Results 21 to 30 of about 720 (168)
Zootaxa, 2015 The extinct Lithornithidae include several genera and species of flying palaeognathous birds of controversial affinities known from the Early Paleogene of North America and Europe. An almost complete, articulated skeleton from the Early Eocene marine deposits of the Fur Formation (Denmark) was recently assigned to Lithornis vulturinus Owen, 1840.
Bourdon, Estelle +1 more
openaire +5 more sources
Insights into avian molecular cytogenetics—with reptilian comparisons [PDF]
Molecular CytogeneticsIn the last 100 years or so, much information has been accumulated on avian karyology, genetics, physiology, biochemistry and evolution. The chicken genome project generated genomic resources used in comparative studies, elucidating fundamental ...
Darren K. Griffin +5 more
doaj +2 more sources
Evidence of a true pharyngeal tonsil in birds: a novel lymphoid organ in
Frontiers in Zoology, 2012 Background Tonsils are secondary lymphoid organs located in the naso- and oropharynx of most mammalian species. Most tonsils are characterised by crypts surrounded by dense lymphoid tissue. However, tonsils without crypts have also been recognised.
Crole Martina R, Soley John T
doaj +4 more sources
The Comparative and Developmental Genomics of Flightlessness in Birds (Palaeognathae)
, 2020 Biology, Organismic and ...
Grayson, Phillip D.
openaire +2 more sources
A Derived Morphology of the Quadrate May Support a Previously Unrecognized Major Higher-Level Clade of Neoavian Birds. [PDF]
J MorpholThe avian quadrate plays a critical role in cranial kinesis, but few comparative studies exist of its morphological variation across higher‐level taxa. In this study, the occurrence of a markedly concave articular facet of the condylus medialis is surveyed across neornithine birds.
Mayr G.
europepmc +2 more sources
The hearing capabilities of the Dromornithidae (Aves), with inferences on acoustic communication and ecology. [PDF]
J AnatThe preservation of bony structures which enclose the hearing organs (ECD) provide a basis for interpreting the hearing capabilities of the extinct, flightless Dromornithidae (Aves). Although the length of the dromornithid ECD was especially short, relative to basicranial length, it conformed to the negative allometric scaling relationships observed in
McInerney PL, Handley WD, Worthy TH.
europepmc +2 more sources
Peer Community Journal, 2021 Crown birds are subdivided into two main groups, Palaeognathae and Neognathae, that can be distinguished, among other means, by the organization of the bones in their pterygoidpalatine complex (PPC).
Plateau, Olivia, Foth, Christian
doaj +1 more source
Ontogenetic scaling patterns and functional anatomy of the pelvic limb musculature in emus (Dromaius novaehollandiae) [PDF]
PeerJ, 2014 Emus (Dromaius novaehollandiae) are exclusively terrestrial, bipedal and cursorial ratites with some similar biomechanical characteristics to humans. Their growth rates are impressive, as their body mass increases eighty-fold from hatching to adulthood ...
Luis P. Lamas +2 more
doaj +2 more sources
Publicación Electrónica de la Asociación Paleontológica Argentina, 2023 “The present state of knowledge of the Cenozoic birds of Argentina” published in Contributions in Sciences in 1980, written by the argentine paleontologist Eduardo Pedro Tonni, became a must-read for those interested in the record of fossil birds.
Claudia P. Tambussi +2 more
doaj +1 more source
Bone histology, phylogeny, and palaeognathous birds (Aves: Palaeognathae) [PDF]
Biological Journal of the Linnean Society, 2014 The presence of a phylogenetic signal in the variation of osteohistological features has been recently debated in the literature. Previous studies have found a significant signal for some features, but these results were obtained on a small amount of characters and a reduced sample.
Legendre, Lucas +6 more
openaire +4 more sources