Results 81 to 90 of about 2,737 (210)

Three‐Dimensional Limb Kinematics in Brown‐Throated Three‐Toed Sloths (Bradypus variegatus) During Suspensory Quadrupedal Locomotion

open access: yesJournal of Experimental Zoology Part A: Ecological and Integrative Physiology, Volume 343, Issue 5, Page 564-577, June 2025.
ABSTRACT Suspensory locomotion differs significantly from upright quadrupedal locomotion in mammals. Nevertheless, we know little concerning joint kinematics of suspensory movement. Here, we report three‐dimensional kinematic data during locomotion in brown‐throated three‐toed sloths (Bradypus variegatus). Individuals were recorded with four calibrated
Angela M. Mossor   +8 more
wiley   +1 more source

An Enigmatic Nothrotheriinae (Xenarthra, Tardigrada) from the Pleistocene of Argentina

open access: yesAmeghiniana, 2015
The aim of this contribution is to describe two femora (MACN Pv 14148 and MACN Pv 14149 ) recovered from the Pleistocene of Santa Fe Province Argentina, provided a taxonomic assignation for them, and to discuss some taxonomic and biogeographical aspects of these finds.
Brandoni, Diego, McDonald, H. Gregory
openaire   +2 more sources

Allometry of the bones of living and extinct armadillos (Xenarthra, Dasypoda) [PDF]

open access: yes, 1997
Fil: Farina, Richard A.. Departamento de Paleontología.
Farina, Richard A.   +1 more
openaire   +1 more source

Enamel-reduction and orthodentine in Dicynodontia (Therapsida) and Xenarthra (Mammalia): an evaluation of the potential ecological signal revealed by dental microwear

open access: yes, 2010
Mastication produces dental scar patterns (microwear) linked to diet in extant mammals, providing a baseline for reconstructing paleodiet in extinct taxa.
Green, Jeremy Lane
core  

Fósseis de Scelidotheriinae Ameghino, 1904 (Xenarthra, Pilosa) em depósitos pleistocênicos do Rio Grande do Sul, Brasil

open access: yes, 2021
Xenarthra (Mylodontidae) is a mammal group which fossil record is conspicuous in Southern Brazil, and includes until now the Mylodontinae, Mylodon, Glossotherium and Lestodon and the Scelidotheriinae Catonyx.
Pereira, Jamil C., Lopes, Renato P.
core   +1 more source

Locomotory Adaptations in 3D Humerus Geometry of Xenarthra: Testing for Convergence

open access: yesFrontiers in Ecology and Evolution, 2020
Three-dimensional (3D) models of fossil bones are increasingly available, thus opening a novel frontier in the study of organismal size and shape evolution.
Carmela Serio   +2 more
doaj   +1 more source

The Initial Opening of the Drake Passage Occurred During ca. 62‐59 Ma

open access: yesGeophysical Research Letters, Volume 52, Issue 7, 16 April 2025.
Abstract Although the Drake Passage has been considered a critical component of ocean circulation and climate, its initial opening age remains controversial due to the weak constraints on the paleoposition of the Antarctic Peninsula. Here, new zircon U‐Pb geochronological studies are conducted on the Barchans Islands, providing a critical age ...
Liang Gao   +16 more
wiley   +1 more source

Numerous independent gains of daily torpor and hibernation across endotherms, linked with adaptation to diverse environments

open access: yesFunctional Ecology, Volume 39, Issue 3, Page 824-839, March 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Many endotherms from diverse taxonomic groups can respond to environmental changes through torpor, that is, by greatly reducing their energy expenditure for up to 24 hours (daily torpor) or longer (hibernation).
Dimitrios‐Georgios Kontopoulos   +2 more
wiley   +1 more source

The sloths Scelidotheriinae (Xenarthra, Folivora): Taxonomy, biocronology, and biogeography [PDF]

open access: yes, 2020
Los perezosos Scelidotheriinae (Mammalia, Xenarthra, Mylodontidae) representan un clado sudamericano que, a pesar de tener una distribución geográfica muy amplia, no participaron del Gran Intercambio Biótico Americano (GIBA).
Quiñones, Sofía Inés   +1 more
core  

Sobre la presencia de un supuesto Haplodontheriinae (Mammalia, Toxodontidae) en el Pleistoceno tardío de la provincia de Corrientes (Argentina)

open access: yesRevista Mexicana de Biodiversidad, 2012
En el extremo sur de América del Sur, se han postulado varias áreas que podrían haber actuado como reservorio de taxones supérstites, especialmente en el lapso Mioceno-Pleistoceno tardío (“Araucanense”-Lujanense).  Así, en el Pleistoceno tardío (ca.
Angel Ramon Miño-Boilini
doaj   +1 more source

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