Results 21 to 30 of about 5,297 (161)

The Ancestral Eutherian Karyotype Is Present in Xenarthra

PLoS Genetics, 2006
Molecular studies have led recently to the proposal of a new super-ordinal arrangement of the 18 extant Eutherian orders. From the four proposed super-orders, Afrotheria and Xenarthra were considered the most basal. Chromosome-painting studies with human probes in these two mammalian groups are thus key in the quest to establish the ancestral Eutherian
M. Svartman, G. Stone, STANYON, ROSCOE ROBERT   +2 more
openaire   +5 more sources

Morphological variation in atlas and axis of Neotropical spiny rats (Rodentia, Echimyidae)

The Anatomical Record, EarlyView.
Abstract The unique morphologies of the first two cervical vertebrae, the atlas and axis, represent a significant innovation in mammalian evolution. These structures support the weight of the head and enable intricate movements of the head and neck.
Thomas Furtado da Silva Netto, João Felipe Leal Kaiuca, Adriana Itatí Olivares, William Corrêa Tavares   +3 more
wiley   +1 more source

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, Marco Camaiti, Abigail S. Tucker, Akinobu Watanabe, Anjali Goswami   +4 more
wiley   +1 more source

How is the third jaw joint in whales different? Diverse modes of articulation between the jaws of whales

Journal of Anatomy, Volume 247, Issue 6, Page 1224-1240, December 2025.
This study conducts the first comprehensive morphological investigation of the mandibular symphysis in whales. Using gross anatomical observation and CT cross‐sectional data, we describe diverse joint morphologies across 74 extant and fossil cetacean taxa. Toothed whales exhibit unfused, partially fused, or fully fused symphyses.
Rebecca J. Strauch, Nicholas D. Pyenson, Carlos Mauricio Peredo   +2 more
wiley   +1 more source

Genomic Signatures in Maned Three‐Toed Sloths From Ancient to Recent Environmental Changes in Brazil's Threatened Atlantic Forest

Molecular Ecology, Volume 34, Issue 23, December 2025.
ABSTRACT Environmental and climatic changes have shaped the evolutionary trajectories of natural populations, leaving genomic signatures that reflect how species respond to these shifts and their impacts on genetic health. While these insights are essential for unravelling evolutionary histories and informing conservation strategies, studies on ...
Larissa S. Arantes, Diego De Panis, Flávia R. Miranda, Fabrício R. Santos, Michael Hiller, Camila J. Mazzoni   +5 more
wiley   +1 more source

Resolution among major placental mammal interordinal relationships with genome data imply that speciation influenced their earliest radiations [PDF]

, 2010
Background: A number of the deeper divergences in the placental mammal tree are still inconclusively resolved despite extensive phylogenomic analyses.
Hallström, Björn M., Janke, Axel
core  

Effects of Landscape Characteristics on Abundance of Giant Anteaters in Intensively Farmed Areas

Biotropica, Volume 57, Issue 6, November 2025.
In this study, we analyzed the abundance of giant anteaters in 55 landscapes within a 34,000 km2 region that has undergone significant transformation due to intensive agricultural practices, particularly the cultivation of sugarcane. In each landscape, we used three camera traps to record the presence of this species. Our occupancy models revealed that
Samia C. dos Reis, Larissa L. Bailey, Adriano G. Chiarello   +2 more
wiley   +1 more source

Evolutionary Implications of Dental Eruption in Dasypus (Xenarthra)

Journal of Mammalian Evolution, 2011
Late eruption of the permanent dentition was recently proposed as a shared anatomical feature of endemic African mammals (Afrotheria), with anecdotal reports indicating that it is also present in dasypodids (armadillos). In order to clarify this question, and address the possiblity that late eruption is shared by afrotherians and dasypodids, we ...
Ciancio, Martín Ricardo, Cordeiro de Castro, Mariela, Galliari, Fernando Carlos, Carlini, Alfredo Armando, Asher, Robert J.   +4 more
openaire   +3 more sources

Craniogenetic studies in Sus scrofa: With emphasis on the ‘orbitosphenoid’ problem

The Anatomical Record, Volume 308, Issue 7, Page 1931-1943, July 2025.
Abstract The orbitosphenoid is a skeletal element of the endocranium of extant mammals. However, it has also been described in many of their fossil ancestors. Craniogenetic studies show that it is composed of two types of bone: first, the cartilaginous ala orbitalis and parts of the trabecular plate are transformed by endochondral ossification; second,
Wolfgang Maier, Ulla Lächele, Irina Ruf
wiley   +1 more source

Zaedyus pichiy (Cingulata: Dasypodidae) [PDF]

, 2014
Fil: Superina, Mariella. Instituto de Medicina y Biología Experimental de Cuyo. CCT. Mendoza; ArgentinaFil: Abba, Agustín Manuel. División Zoología Vertebrados. Facultad de Ciencias Naturales y Museo.
Abba, Agustín Manuel, Superina, Mariella   +1 more
core   +2 more sources