Results 71 to 80 of about 5,474 (205)

Molecular and morphological baraminology of Xenarthra

, 2023
There are 31 xenarthran species living today, made up of armadillos, anteaters, and sloths. These animals are characterized by a narrow, elongated skull and a unique vertebral process in the posterior trunk. Xenarthra represents an apobaramin within which several holobaramins may be discerned, using both mitochondrial DNA and morphological data.
openaire   +1 more source

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

Geophysical 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, Xiaoqian Guo, Junling Pei, Javier N. Gelfo, Xinwei Hu, Sha Li, Tian Jiang, Meinan Shi, Xuelian You, Fang Gu, Yunying Zhang, Zhen Sun, Zhiliang He, Ruoshuang Li, Yabo Tong, Zhenyu Yang, Yue Zhao   +16 more
wiley   +1 more source

Bilateral pre-axial polydactyly in a wild juvenile Hoffmann’s two-toed sloth (Choloepus hoffmanni)

Xenarthra
Polydactyly is a relatively common congenital condition in humans, also described in some other species of animals, where more digits than usual are present in the hands or feet. The literature about congenital anomalies in sloths is sparse.
Sara Goñi Martinez, Ambre Thiriet, Sofia Astorga Alvarado, Marta Venegas   +3 more
doaj   +1 more source

Sedimentología y vertebrados fósiles de la Formación Santa Cruz (Mioceno temprano) en Lago Posadas, suroeste de Patagonia, Argentina [PDF]

, 2019
Lago Posadas se ubica al pie de los Andes Patagónicos Australes, en el suroeste de Argentina, donde la Formación Santa Cruz (FSC) del Mioceno temprano muestra afloramientos potentes y lateralmente continuos.
Aramendía, Inés, Bargo, María Susana, Cuitiño, José Ignacio, Vizcaíno, Sergio Fabián   +3 more
core   +2 more sources

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

Functional 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, Danielle L. Levesque, Michael Hiller   +2 more
wiley   +1 more source

Background and common lesions in the female reproductive organs of giant anteaters (Myrmecophaga tridactyla)

Frontiers in Veterinary Science
The giant anteater (Myrmecophaga tridactyla) is a vulnerable species in South America and is considered endangered or near extinction in Central America.
Fernanda Barthelson Carvalho de Moura, Zara Alves Lacerda, José Luiz Catão-Dias, Pedro Enrique Navas-Suárez, Pedro Enrique Navas-Suárez, Karin Werther, Sarah Raquel Jesus Santos Simões, Renato de Lima Santos, Daniel Felipe Barrantes Murillo, Tatiane Terumi Negrão Watanabe, Carlos Eduardo Fonseca-Alves, Noeme Sousa Rocha   +11 more
doaj   +1 more source

New materials of Ortotheriinae (Xenarthra, Tardigrada, Megalonychidae) from the “Mesopotamiense” (late Miocene) of Entre Ríos [PDF]

, 2008
Ocho géneros y diecisiete especies de Megalonychidae han sido reconocidos en el "Mesopotamiense" (= " Conglomerado osífero ") de la Formación Ituzaingó (Mioceno Superior-Plioceno) de la Provincia Entre Ríos, Argentina.
Brandoni, Diego
core  

Turbinal bones are still one of the last frontiers of the tetrapod skull: hypotheses, challenges and perspectives

Biological Reviews, Volume 99, Issue 6, Page 2304-2337, December 2024.
ABSTRACT Turbinals are bony or cartilaginous structures that are present in the nasal cavity of most tetrapods. They are involved in key functions such as olfaction, heat, and moisture conservation, as well as protection of the respiratory tract. Despite recent studies that challenged long‐standing hypotheses about their physiological and genomic ...
Quentin Martinez, Eli Amson, Irina Ruf, Timothy D. Smith, Nelly Pirot, Morgane Broyon, Renaud Lebrun, Guillaume Captier, Cristina Gascó Martín, Gabriel Ferreira, Pierre‐Henri Fabre   +10 more
wiley   +1 more source

On the status of “ Urotherium antiquum ” (Ameghino) (Xenarthra, Glyptodontidae)

Comptes Rendus Palevol, 2017
Abstract Within the Late Neogene Glyptodontidae of the Pampean region of Argentina, “Urotherium antiquum” was described on the basis of some associated osteoderms of the dorsal carapace, which in addition include a partial skull and left hemimandible.
Zurita, Alfredo Eduardo, Cuadrelli, Francisco, Tomassini, Rodrigo Leandro, De Los Reyes, Martín, Luna, Carlos, Toriño, Pablo   +5 more
openaire   +2 more sources

The gross reproductive morphology of the male Temminck's pangolin Smutsia temminckii (Smuts, 1832)

Anatomia, Histologia, Embryologia, Volume 53, Issue 4, July 2024.
Abstract The Temminck's pangolin (Smutsia temminckii) is one of eight pangolin species worldwide and the only pangolin present in southern Africa. Historically, pangolins have not been able to reproduce successfully in captivity and this may be in part due to the lack of knowledge and understanding with regards to the pangolin reproductive system ...
Lauren Nicole Tink, Raymond Jansen, Christine Steyn   +2 more
wiley   +1 more source