Results 51 to 60 of about 1,108 (163)
Convergent evolution of cysteine-rich proteins in feathers and hair [PDF]
, 2015 Background Feathers and hair consist of cornified epidermal keratinocytes in which proteins are crosslinked via disulfide bonds between cysteine residues of structural proteins to establish mechanical resilience.
Bettina Strasser +4 more
core +1 more source
Location, location, location: the evolutionary history of CD1 genes and the NKR-P1/ligand systems [PDF]
, 2016 CD1 genes encode cell surface molecules that present lipid antigens to various kinds of T lymphocytes of the immune system. The structures of CD1 genes and molecules are like the major histocompatibility complex (MHC) class I system, the loading of ...
Kaufman, Jim, Rogers, Sally L
core +2 more sources
Ultrastructure of the eggshell of selected Palaeognathae species – a comparative analysis
Annals of Animal Science, 2014 AbstractThe study aimed at comparative analysis of the eggshell ultrastructure, indicating differences and similarities in its structure depending on the bird species. The study was carried out in ostrich, emu and rhea breeding flocks. The birds were kept under open system.
Danuta Szczerbińska, Monika Wiercińska
openaire +1 more source
A Phylogenomic Supertree of Birds
Diversity, 2019 It has long been appreciated that analyses of genomic data (e.g., whole genome sequencing or sequence capture) have the potential to reveal the tree of life, but it remains challenging to move from sequence data to a clear understanding of evolutionary ...
Rebecca T. Kimball +13 more
doaj +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 +3 more
openaire +3 more sources
Biological Reviews, EarlyView.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 +6 more
wiley +1 more source
The Evolution of Flightless Ratite Birds [PDF]
, 2018 Birds are well known for their unique (other than bats) ability among vertebrates of flight. Through millions of years of evolution, before they were even classified as such, and for reasons and methods still largely unknown, birds evolved the ability to
Karparis, Abigail
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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 +6 more
wiley +1 more source
Comparative ossification sequence and skeletal development of the postcranium of palaeognathous birds (Aves: Palaeognathae) [PDF]
Zoological Journal of the Linnean Society, 2009 Palaeognaths constitute one of the most basal lineages of extant birds, and are also one of the most morphologically diverse avian orders. Their skeletal development is relatively unknown, in spite of their important phylogenetic position. Here, we compare the development of the postcranial skeleton in the emu (Dromaius novaehollandiae), ostrich ...
ERIN E. MAXWELL, HANS C. E. LARSSON
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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 +3 more
doaj +1 more source