Results 61 to 70 of about 1,345 (170)

Adaptive Immunity in Marsupials

open access: yesJournal of Experimental Zoology Part A: Ecological and Integrative Physiology, Volume 345, Issue 9, Page 913-932, November 2026.
Comparison of the marsupial and eutherian adaptive immune systems. ABSTRACT Marsupials diverged from eutherian mammals 125–160 million years ago. Although evolutionarily distinct, both groups of mammals can produce complex adaptive immune responses to antigens with several key differences.
Cassandra L. Jol   +2 more
wiley   +1 more source

Fleas From the Northern Hairy‐Nosed Wombat and Other Mammalian Hosts of Australia

open access: yesAustral Entomology, Volume 65, Issue 4, November 2026.
ABSTRACT One of us (DKM) amassed a collection of 283 adult fleas (18 species) from donations by staff of the Queensland National Parks and Wildlife Service and other mammalogists, over 20 years (1967–87). Among this large collection were the first fleas to be found on three species of Australian mammals: (i) Lasiorhinus krefftii, the northern hairy ...
David K. Mardon   +2 more
wiley   +1 more source

Updating the forelimb anatomy of the domestic cat (Felis catus, Felidae) based on evolutionary inferences of its muscles and nerves I: Shoulder and brachium

open access: yesJournal of Anatomy, Volume 249, Issue 5, Page 1138-1169, November 2026.
In this study, we provide a detailed description of the shoulder and brachium muscles and the brachial plexus of the domestic cat (Felis catus). We identified muscular variants (articularis humeri, coracobrachialis longus, biceps brachii caput breve), clarified the independence of the anconeus medialis muscle from the triceps brachii muscle, and ...
Juan Fernando Vélez García   +2 more
wiley   +1 more source

Vestibular development in marsupials and monotremes

open access: yesJournal of Anatomy, 2013
AbstractThe young of marsupials and monotremes are all born in an immature state, followed by prolonged nurturing by maternal lactation in either a pouch or nest. Nevertheless, the level of locomotor ability required for newborn marsupials and monotremes to reach the safety of the pouch or nest varies considerably: some are transferred to the pouch or ...
Ken W S, Ashwell, Boaz, Shulruf
openaire   +3 more sources

Evolutionary Analyses and Natural Selection of Betaine-Homocysteine S-Methyltransferase (BHMT) and BHMT2 Genes. [PDF]

open access: yesPLoS 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

Humans are not unique: difficult birth is common in placental mammals

open access: yesBiological Reviews, Volume 101, Issue 5, Page 2214-2239, October 2026.
ABSTRACT Human childbirth is widely presumed to be uniquely difficult and dangerous compared to birth in other mammals. Tight fetopelvic proportions can result in obstructed labour and contribute to high rates of maternal and neonatal mortality. Ideas summarised under the ‘obstetrical dilemma’ have contributed to this assumption by explaining difficult
Nicole D. S. Grunstra
wiley   +1 more source

Hibernation in a monotreme, the echidna (Tachyglossus aculeatus) [PDF]

open access: yesComparative Biochemistry and Physiology Part A: Physiology, 1989
The body temperatures of five echidnas in Australia's Southern Alps were monitored by radio telemetry from February to December 1987. All five hibernated throughout the winter, showing very low body temperatures (4-9 degrees C, close to ambient) when torpid, compared with 28-33 degrees C in a typical day during the active season.
Grigg, GC, Beard, LA, Augee, ML
openaire   +5 more sources

Buildings as accidental habitat: Where animals nest, sleep and forage

open access: yesPeople and Nature, Volume 8, Issue 10, Page 3531-3551, October 2026.
Abstract Animals have long inhabited human buildings alongside us, but our understanding comes from isolated studies, such as reports of a possum in the roof or a bat in our walls. What we lack is the building's perspective: which building features actually serve as habitat and for whom?
Bethany M. Kiss   +6 more
wiley   +1 more source

A perspective from the Mesozoic: Evolutionary changes of the mammalian skull and their influence on feeding efficiency and high‐frequency hearing

open access: yesThe Anatomical Record, Volume 309, Issue 9, Page 2315-2330, September 2026.
Abstract The complex evolutionary history behind modern mammalian chewing performance and hearing function is a result of several changes in the entire skeletomuscular system of the skull and lower jaw. Lately, exciting multifunctional 3D analytical methods and kinematic simulations of feeding functions in both modern and fossil mammals and their ...
Julia A. Schultz
wiley   +1 more source

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