Results 1 to 10 of about 3,006 (159)

First monotreme from the Late Cretaceous of South America [PDF]

Communications Biology, 2023
An isolated tooth from the Late Cretaceous of Argentina indicates a monotreme presence in South America by the end of the Mesozoic.
Nicolás R. Chimento, Federico L. Agnolín, Makoto Manabe, Takanobu Tsuihiji, Thomas H. Rich, Patricia Vickers-Rich, Fernando E. Novas   +6 more
doaj   +2 more sources

AMHY and sex determination in egg-laying mammals [PDF]

Genome Biology
Background Egg-laying mammals (monotremes) evolved multiple sex chromosomes independently of therian mammals and lack the sex-determining gene SRY. The Y-localized anti-Müllerian hormone gene (AMHY) is the candidate sex-determination gene in monotremes ...
Linda Shearwin-Whyatt, Jane Fenelon, Hongshi Yu, Andrew Major, Zhipeng Qu, Yang Zhou, Keith Shearwin, James Galbraith, Alexander Stuart, David Adelson, Guojie Zhang, Michael Pyne, Stephen Johnston, Craig Smith, Marilyn Renfree, Frank Grützner   +15 more
doaj   +2 more sources

Pseudogenization of NK3 homeobox 2 (Nkx3.2) in monotremes provides insight into unique gastric anatomy and physiology [PDF]

Open Biology
The enzymatic breakdown and regulation of food passage through the vertebrate antral stomach and pyloric sphincter (antropyloric region) is a trait conserved over 450 million years.
Jackson Dann, Zhipeng Qu, Linda Shearwin-Whyatt, Rachel van der Ploeg, Frank Grützner   +4 more
doaj   +2 more sources

Marsupial cathelicidins: characterization, antimicrobial activity and evolution in this unique mammalian lineage [PDF]

Frontiers in Immunology
IntroductionCathelicidins are a family of antimicrobial peptides well-known for their antimicrobial and immunomodulatory functions in eutherian mammals such as humans.
Emma Peel, Emma Peel, Adele Gonsalvez, Adele Gonsalvez, Carolyn J. Hogg, Carolyn J. Hogg, Katherine Belov, Katherine Belov   +7 more
doaj   +2 more sources

The Spleen Virome of Australia’s Endemic Platypus Is Dominated by Highly Diverse Papillomaviruses [PDF]

Viruses
The platypus (Ornithorhynchus anatinus), a unique monotreme, represents a pivotal point in mammalian evolution with its distinctive traits, such as electroreception and venom production.
Subir Sarker, Saranika Talukder, Ajani Athukorala, Pam L. Whiteley   +3 more
doaj   +2 more sources

Deciphering the origins of guanylate-binding proteins in mammals (Monotreme, Marsupials and Placentals) [PDF]

BMC Biology
Background Guanylate-binding proteins (GBPs) belong to the large guanosine triphosphatases (GTPases) family and have specialised in host defence in vivo against a broad spectrum of invading pathogens.
João Vasco Côrte-Real, Ana Pinheiro, Jordan M. Sampson, Kimberly A. Morrissey, João Pedro Marques, Hanna-Mari Baldauf, Robert D. Miller, Joana Abrantes, Pedro José Esteves   +8 more
doaj   +2 more sources

The TMJ Disc Is a Common Ancestral Feature in All Mammals, as Evidenced by the Presence of a Rudimentary Disc During Monotreme Development

Frontiers in Cell and Developmental Biology, 2020
The novel mammalian jaw joint, known in humans as the temporomandibular joint or TMJ, is cushioned by a fibrocartilage disc. This disc is secondarily absent in therian mammals that have lost their dentition, such as giant anteaters and some baleen whales.
Neal Anthwal, Abigail S. Tucker
exaly   +3 more sources

Tracing Monotreme Venom Evolution in the Genomics Era

Toxins, 2014
The monotremes (platypuses and echidnas) represent one of only four extant venomous mammalian lineages. Until recently, monotreme venom was poorly understood.
Camilla Whittington, Katherine Belov, Camilla M Whittington   +2 more
exaly   +3 more sources

Extreme telomere length dimorphism in the Tasmanian devil and related marsupials suggests parental control of telomere length. [PDF]

PLoS ONE, 2012
Telomeres, specialised structures that protect chromosome ends, play a critical role in preserving chromosome integrity. Telomere dynamics in the Tasmanian devil (Sarcophilus harrisii) are of particular interest in light of the emergence of devil facial ...
Hannah S Bender, Elizabeth P Murchison, Hilda A Pickett, Janine E Deakin, Margaret A Strong, Carly Conlan, Daniel A McMillan, Axel A Neumann, Carol W Greider, Gregory J Hannon, Roger R Reddel, Jennifer A Marshall Graves   +11 more
doaj   +11 more sources

Color vision evolution in egg-laying mammals: insights from visual photoreceptors and daily activities of Australian echidnas [PDF]

Zoological Letters
Egg-laying mammals (monotremes) are considered “primitive” due to traits such as oviparity, cloaca, and incomplete homeothermy, all of which they share with reptiles.
Shiina Sakamoto, Yuka Matsushita, Akihiro Itoigawa, Takumi Ezawa, Takeshi Fujitani, Kenichiro Takakura, Yang Zhou, Guojie Zhang, Frank Grutzner, Shoji Kawamura, Takashi Hayakawa   +10 more
doaj   +2 more sources