Results 61 to 70 of about 3,006 (159)
A suture in time: The ontogeny of cranial suture morphology in mammals
Journal of Anatomy, Volume 248, Issue 3, Page 501-516, March 2026.Mammal cranial sutures are important indicators of the biomechanical and developmental pressures acting upon the skull. Across three prominent sutures dividing the vault of the mammalian skull, divergent patterns emerge both taxonomically and developmentally.
Heather E. White +4 more
wiley +1 more source
ZooKeys, 2012 The monotreme genus Zaglossus, the largest egg-laying mammal, comprises several endangered taxa today known only from New Guinea. Zaglossus is considered to be extinct in Australia, where its apparent occurrence (in addition to the large echidna genus ...
Kristofer M. Helgen +3 more
doaj +1 more source
Sexual Antagonism and the Evolution of X Chromosome Inactivation [PDF]
, 2013 In most female mammals, one of the two X chromosomes is inactivated early in embryogenesis. Expression of most genes on this chromosome is shut down, and the inactive state is maintained throughout life in all somatic cells.
Engelstädter, Jan, Haig, David Addison
core +1 more source
Veterinary Medicine and Science, Volume 12, Issue 1, January 2026.The common pheasant heart is elongated and conical, with thicker left ventricular walls and a complex atrioventricular valve structure. Purkinje fibres show strong desmin but no α‐SMA expression, providing detailed insights into cardiovascular morphology and adaptations in birds, supporting comparative and conservation studies.
Hadis Ramezani, Nader Goodarzi
wiley +1 more source
Are Hibernators Toast? Global Climate Change and Prolonged Seasonal Hibernation
Global Change Biology, Volume 32, Issue 1, January 2026.This review examines how global climate change impacts mammalian hibernators, emphasizing physiological, ecological and phenological aspects. Many hibernating species already inhabit extreme environments, thus are at risk as climate variability intensifies.
Kathrin H. Dausmann +1 more
wiley +1 more source
Endocranial Morphology of the Extinct North American Lion (Panthera atrox) [PDF]
, 2017 The extinct North American lion (Panthera atrox) is one of the largest felids (Mammalia, Carnivora) to have ever lived, and it is known from a plethora of incredibly well-preserved remains.
Cuff, A R, Goswami, A, Stockey, C
core +2 more sources
Developmental Dynamics, Volume 254, Issue 12, Page 1307-1324, December 2025.Abstract Background Longitudinal skeletal growth takes place in the cartilaginous growth plates. While growth plates are found at either end of conventional long bones, they occur at a variety of locations in the mammalian skeleton. For example, the metacarpals and metatarsals (MT) in the hands and feet form only a single growth plate at one end, and ...
Philip L. Reno +4 more
wiley +1 more source
Functional characterization of the rod visual pigment of the echidna (Tachyglossus aculeatus), a basal mammal [PDF]
, 2017 Monotremes are the most basal egg-laying mammals comprised of two extant genera, which are largely nocturnal. Visual pigments, the first step in the sensory transduction cascade in photoreceptors of the eye, have been examined in a variety of vertebrates,
BICKELMANN, CONSTANZE +3 more
core
Review of the tetrapod skull–neck boundary: implications for the evolution of the atlas–axis complex
Biological Reviews, Volume 100, Issue 6, Page 2435-2470, December 2025.ABSTRACT This review describes variation in modern and fossil occiput–atlas–axis complex anatomy of total group Tetrapoda with the aim of documenting the range of structural variation throughout their evolutionary history to establish grounds for comparison of the complex between tetrapod clades.
Dana E. Korneisel, Hillary C. Maddin
wiley +1 more source
Evolutionary Analyses and Natural Selection of Betaine-Homocysteine S-Methyltransferase (BHMT) and BHMT2 Genes. [PDF]
PLoS ONE, 2015 Betaine-homocysteine S-methyltransferase (BHMT) and BHMT2 convert homocysteine to methionine using betaine and S-methylmethionine, respectively, as methyl donor substrates.
Radhika S Ganu +6 more
doaj +1 more source