Results 61 to 70 of about 3,218 (200)

Molecular decay of the tooth gene Enamelin (ENAM) mirrors the loss of enamel in the fossil record of placental mammals. [PDF]

PLoS Genetics, 2009
Vestigial structures occur at both the anatomical and molecular levels, but studies documenting the co-occurrence of morphological degeneration in the fossil record and molecular decay in the genome are rare.
Robert W Meredith, John Gatesy, William J Murphy, Oliver A Ryder, Mark S Springer   +4 more
doaj   +1 more source

Multi‐Species Canopy Latrines in Costa Rican Cloud Forests: A Mammal Interactions Hub in a Single Tree Species

Ecology and Evolution, Volume 16, Issue 3, March 2026.
We documented arboreal, multi‐species mammal latrines in montane cloud forests of Costa Rica by surveying 169 trees across 29 species. Latrines were found exclusively on Ficus tuerckheimii, with 11 occurrences across two mountain ranges and an additional observation in Honduras.
Jeremy Quirós‐Navarro, Tim Chamberlain, Deiver Espinoza   +2 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

Placentation in the anteaters Myrmecophaga tridactyla and Tamandua tetradactyla (Eutheria, Xenarthra) [PDF]

Reproductive Biology and Endocrinology, 2012
Since Xenarthra are serious candidates for being basal to Eutheria, their characteristics, e.g. the placental system, influence perceptions of evolution. However, in the subgroup containing the anteaters, data are very limited. The present study aims to elucidate the nature of the feto-maternal interface in the anteater placenta and to interpret these ...
Mess Andrea M, Favaron Phelipe O, Pfarrer Christiane, Osmann Christine, Melo Allan PF, Rodrigues Rosangela F, Ambrósio Carlos E, Bevilacqua Estela, Miglino Maria A   +8 more
openaire   +3 more sources

Análise morfológica de pelos dos xenarthra brasileiros [PDF]

, 2020
Orientador: Prof. Dr. Emygdio Leite de Araujo Monteiro-FilhoDissertação (mestrado) - Universidade Federal do Paraná, Setor de Ciências Biológicas, Programa de Pós-Graduação em Zoologia.
Santos, Lucas Enes
core  

Variación no alométrica en el cráneo del perezoso bayo Bradypus variegatus (Schinz, 1825) (Mammalia, Pilosa, Bradypodidae)

Graellsia, 2019
El perezoso bayo Bradypus variegatus (Schinz, 1825) es un mamífero monomórfico, de ontogenia craneal poco conocida. En este estudio analizamos la alometría estática entre tamaño y forma, utilizando 21 especímenes diferentes de edades diversas.
P. M. Parés-Casanova
doaj   +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

Paleogene Glyptodontidae Propalaehoplophorinae (Mammalia, Xenarthra) in extra-Patagonian areas [PDF]

Andean Geology, 2015
Paleogene records of Cingulata Glyptodontidae are scarce. The only well described comes from the Paleogene of Argentine Patagonia. Two subfamilies have been reported for that period: Glyptatelinae and Propalaehoplophorinae. Until this contribution, the latter taxon was geographically restricted to the locality of El Pajarito (Late Oligocene, Deseadan ...
Alfredo E. Zurita, Laureano González Ruiz, Ángel R. Miño‐Boilini, Rafael Herbst, Gustavo J. Scillato‐Yané, Pedro Cuaranta   +5 more
openaire   +5 more sources

When the giant rests: Evidence of prolonged inactivity in the giant armadillo (Priodontes maximus) of the Pantanal

Xenarthra
We documented prolonged inactivity (12 consecutive days), an uncommon behavior, in a giant armadillo (Priodontes maximus) in the Pantanal. Unlike previous observations in the Amazon, there was no internal activity or alternative exits, suggesting ...
Mattheus S. Firme, Gabriel F. Massocato, Arnaud L.J. Desbiez   +2 more
doaj   +1 more source