Structure, ontogeny and evolution of the patellar tendon in emus (Dromaius novaehollandiae) and other palaeognath birds [PDF]
PeerJ, 2014 The patella (kneecap) exhibits multiple evolutionary origins in birds, mammals, and lizards, and is thought to increase the mechanical advantage of the knee extensor muscles.
Sophie Regnault +2 more
doaj +18 more sources
Broad-scale recombination pattern in the primitive bird Rhea americana (Ratites, Palaeognathae). [PDF]
PLoS ONE, 2017 Birds have genomic and chromosomal features that make them an attractive group to analyze the evolution of recombination rate and the distribution of crossing over.
Lucía Del Priore, María Inés Pigozzi
doaj +5 more sources
Hindlimb morphology of Palaeotis suggests palaeognathous affinities of the Geranoididae and other “crane-like” birds from the Eocene of the Northern Hemisphere [PDF]
Acta Palaeontologica Polonica, 2019 The early/middle Eocene Palaeotis weigelti is a flightless bird, which occurs in the fossil localities Messel and Geiseltal (Germany). The species is assigned to the Palaeognathae and some authors considered it to be a stem group representative of the ...
Gerald Mayr
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A lithornithid (Aves: Palaeognathae) from the Paleocene (Tiffanian) of southern California [PDF]
PaleoBios, 2014 The proximal end of a bird humerus recovered from the Paleocene Goler Formation of southern California is the oldest Cenozoic record of this clade from the west coast of North America.
Choi, Rachel +4 more
core +5 more sources
The phylogenetic significance of the morphology of the syrinx, hyoid and larynx, of the southern cassowary, Casuarius casuarius (Aves, Palaeognathae) [PDF]
BMC Evolutionary Biology, 2019 Background Palaeognathae is a basal clade within Aves and include the large and flightless ratites and the smaller, volant tinamous. Although much research has been conducted on various aspects of palaeognath morphology, ecology, and evolutionary history,
Phoebe L. McInerney +3 more
doaj +3 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 selfish preen: absence of allopreening in Palaeognathae and its socio-cognitive implications. [PDF]
Anim Cogn, 2023 AbstractPreening behaviours are widespread in extant birds. While most birds appear to autopreen (self-directed preening), allopreening (preening directed at conspecifics) seems to have emerged only in certain species, but across many families. Allopreening has been hypothesised to reinforce mutual relationships and cooperation between individuals, and
Jensen TR, Zeiträg C, Osvath M.
europepmc +3 more sources
3D atlas of tinamou (Neornithes: Tinamidae) pectoral morphology: Implications for reconstructing the ancestral neornithine flight apparatus. [PDF]
J Anat, 2023 Tinamous are the only members of Palaeognathae (a clade containing giant flightless birds such as the ostrich) that are capable of flight. We utilized contrast enhanced micro CT scanning to explore in detail the musculoskeletal anatomy of the flight apparatus of the Andean tinamou, Nothoprocta pentlandii.
Widrig KE, Bhullar BS, Field DJ.
europepmc +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