Results 41 to 50 of about 720 (168)
FEBS Open Bio, 2021 Beta‐microseminoproteins (MSMBs) are small disulfide‐rich proteins that are conserved among vertebrates. These proteins exhibit diverse biological activities and were mainly reported to play a role in male fertility, immunity, and embryogenesis.
Franck Coste +9 more
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, 2022 Figure 2. Simpson's ratio diagram comparing the lengths of scapulocoracoid (SC), humerus (H), femur (F), tibiotarsus (TT), tarsometatarsus (TM), and the first (III/1), second (III/2), and third (III/3) pedal digit III phalanges of living and extinct ...
Elzanowski, Andrzej, Louchart, Antoine
core +1 more source
The peculiar syrinx of Rhea americana (Greater Rhea, Palaeognathae)
Vertebrate Zoology, 2013 This work studied the skeletal and muscular syringeal anatomy of Greater Rhea (Rhea americana) throughout postnatal ontogeny, by using muscle staining and differential coloring of cartilage and bone techniques. Anatomical syrinx dissections on four adults (one female and three males) and eight unsexed chicks, were made.
Mariana Beatriz Julieta Picasso +1 more
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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 +2 more sources
, 2012 Current evolutionary consensus, based on both molecular and morphological data, suggests that there are two broad subdivisions at the base of living birds (Neornithes), the neognaths (Neognathae) and palaeognathous birds (Palaeognathae). Palaeognaths are
Gareth J Dyke +3 more
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Evolution and development of the bird chondrocranium
Frontiers in Zoology, 2021 Background Birds exhibit an enormous diversity in adult skull shape (disparity), while their embryonic chondrocrania are considered to be conserved across species.
Evelyn Hüppi +2 more
doaj +1 more source
Cytoplasmic Shift of Interferon Regulatory Factors Co-Evolved With Jawed Vertebrate Innate Immunity. [PDF]
J Med VirolABSTRACT The emergence of jaws in early vertebrates introduced a novel feeding apparatus and powerful oral defenses, but it also increased the risk of physical injury and pathogen exposure. Interferon regulatory factors (IRFs) play critical roles in orchestrating innate immunity and inflammation in response to invading microbes and tissue damage, with ...
Hubing V +5 more
europepmc +2 more sources
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
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Clade‐wide morphological and functional variation of the sauropsid columella
The Anatomical Record, EarlyView.Abstract The columella (=stapes) is the middle ear bone of reptiles that transmits vibrations from the environment to the inner ear. It has been shown to exhibit extensive interspecific morphological disparity in several clades; however, its morphological variation and associated functional consequences remain poorly described.
John Peacock +4 more
wiley +1 more source
Comparative ossification and development of the skull in palaeognathous birds (Aves: Palaeognathae) [PDF]
Zoological Journal of the Linnean Society, 2009 Ratites and tinamous are a morphologically diverse group of flightless and weakly flighted birds. As one of the most basal clades of extant birds, they are frequently used as an outgroup for studies discussing character evolution within other avian orders.
openaire +1 more source