Results 51 to 60 of about 720 (168)

The pectoralis muscle orientation as an indicator of the modes of wing‐propelled locomotion in birds

Journal of Anatomy, EarlyView.
The pectoralis orientation of birds was consistent with the orientation of the aerodynamic force acting on the wing, varying by wing‐propelled locomotion (WPL) mode. The skeletal morphology unique to each WPL mode, related to the origin/insertion of the pectoralis, may be associated with these functional demands of pectoralis orientation.
Takumi Akeda, Shin‐ichi Fujiwara
wiley   +1 more source

Beyond mammals: the evolution of chewing and other forms of oropharyngeal food processing in vertebrates

Biological Reviews, Volume 101, Issue 3, Page 1406-1462, June 2026.
ABSTRACT Oropharyngeal food processing exhibits a remarkable diversity among vertebrates, reflecting the evolution of specialised ‘processing centres’ associated with the mandibular, hyoid, and branchial arches. Although studies have detailed various food‐processing strategies and mechanisms across vertebrates, a coherent and comprehensive terminology ...
Daniel Schwarz, Maja Mielke, Stephan Handschuh, Anthony Herrel, Patrick Lemell, Léa Da Cunha, Nicolai Konow   +6 more
wiley   +1 more source

An overview of the oldest and most comprehensive avifauna of the early Eocene British London Clay

Papers in Palaeontology, Volume 12, Issue 3, May/June 2026.
Abstract Early Eocene birds from the British London Clay have been known for two centuries, but a comprehensive understanding of the avifauna of the London Clay Formation is still in its infancy. In the present study, the bird assemblage of the Walton Member is reviewed, which represents one of the oldest subdivisions of the formation.
Gerald Mayr
wiley   +1 more source

Preliminary assessment of bone histology in the extinct elephant bird Aepyornis (Aves, Palaeognathae) from Madagascar [PDF]

Comptes Rendus Palevol, 2016
Aepyornis, a giant subfossil ratite from Madagascar, shows a well-preserved bone histology. Hindlimb bones exhibit an extensive histodiversity; the cortex is initially made of fibrolamellar, well-vascularized primary bone that modulates locally into plexiform or laminar patterns. Lines of arrested growth are generally weakly expressed.
de Ricqlès, Armand, Bourdon, Estelle, Legendre, Lucas J., Cubo, Jorge   +3 more
openaire   +3 more sources

Why do some sex chromosomes degenerate more slowly than others? The odd case of ratite sex chromosomes [PDF]

, 2020
The hallmark of sex chromosome evolution is the progressive suppression of recombination which leads to subsequent degeneration of the non-recombining chromosome.
Alexander Suh, Yazdi, Homa Papoli, Silva, Willian T.A.F., Suh, Alexander,, Silva, Willian T. A. F.,, Homa Papoli Yazdi, Willian T. A. F. Silva, Suh, Alexander, Yazdi, Homa Papoli,, Silva, Willian T. A. F.   +9 more
core   +1 more source

Next generation sequencing and analysis of a conserved transcriptome of New Zealand's kiwi

BMC Evolutionary Biology, 2010
Background Kiwi is a highly distinctive, flightless and endangered ratite bird endemic to New Zealand. To understand the patterns of molecular evolution of the nuclear protein-coding genes in brown kiwi (Apteryx australis mantelli) and to determine the ...
Huynen Leon, Subramanian Sankar, Millar Craig D, Lambert David M   +3 more
doaj   +1 more source

Surgical management of an open humeral fracture in a greater rhea (Rhea americana): Internal placement of a locking compression plate and post‐operative complications

Veterinary Record Case Reports, Volume 14, Issue 2, May 2026.
SUMMARY A 17‐year‐old, 24‐kg, female greater rhea (Rhea americana) presented with an acute onset of left wing droop. Clinical examination and radiographs revealed an open, simple, displaced, short‐oblique diaphyseal fracture of the distal third of the left humerus.
Pierre Huberdeau, Thomas Coutant, Aram Arslanian, Emeline Maurice, Fouad Stephan, Sylvie Laidebeure, Alexis Lécu   +6 more
wiley   +1 more source

ENHYDROSS: A New Mechanistic Model Supports the Trans‐Oceanic Dispersal Capability of Terrestrial Vertebrates

Ecology and Evolution, Volume 16, Issue 4, April 2026.
We introduce ENHYDROSS, a new mechanistic model that uses optimal swimming speed and minimum cost of transport to estimate maximum dispersal distances and durations for vertebrates, enabling assessment of long‐distance oceanic dispersal potential. Applied to a range of extant and extinct animals, the model's estimates generally align with observed data;
Alexandros Pantelides, Paul Upchurch, Philip D. Mannion, Elias Gravanis, Donald M. Henderson, Phaedon Kyriakidis   +5 more
wiley   +1 more source

Figure 3 in Comparative ossification sequence and skeletal development of the postcranium of palaeognathous birds (Aves: Palaeognathae)

, 2009
Figure 3. Comparable developmental stages of Meleagris gallopavo (A), Rhea americana (B) and Dromaius novaehollandiae (C). Each embryo is at stage 34 (Hamburger & Hamilton, 1951) and to the same scale.
Maxwell, Erin E., Larsson, Hans C. E.
core   +1 more source

Le nouveau statut taxonomique de Rhea anchorenensis (Ameghino et Rusconi, 1932) (Aves, Palaeognathae) du Pléistocène d'Argentine

, 2016
Rhea anchorenensis (Ameghino and Rusconi, 1932) is an extinct species of Rheidae (Aves, Palaeognathae) from the Pleistocene of Buenos Aires province, Argentina, only known for a distal fragment of a left tarsometatarsus.
Mosto, María Clelia, Picasso, Mariana Beatriz Julieta   +1 more
core   +1 more source