Results 11 to 20 of about 61,853,120 (146)

Genetic structure and climate niche differentiation among populations of Leopardus geoffroyi. [PDF]

Ecol Evol
Geoffroy's cat (Leopardus geoffroyi) is a small‐sized felid present in a wide variety of habitats in South America, including areas with high levels of anthropization. We identified two genetic clusters, one in the north‐northeast of the species' distribution and the other in the south‐southwest, the latter showing lower genetic variability and a more ...
Fameli AF, Pereira JA, Rojo Gómez J, Gómez Fernández MJ.   +3 more
europepmc   +2 more sources

Genomics Reveal Population Structure and Intergeneric Hybridization in an Endangered South American Bird: Implications for Management and Conservation. [PDF]

Ecol Evol
This study uses genomics to aid conservation of the endangered Yellow cardinal (Gubernatrix cristata), impacted by illegal trade, habitat loss, and potentially hybridization with the Diuca finch (Diuca diuca). It identifies management units, tracks confiscated individuals using a small SNP panel, and confirms occasional hybridization.
Domínguez M, Arantes LS, Lavinia PD, Bergjürgen N, Casale AI, Fracas PA, Lijtmaer DA, Tubaro P, Sparmann S, Mbedi S, Mazzoni C, Mahler B, Tiedemann R.   +12 more
europepmc   +2 more sources

Ontogeny of a Brazilian Late Triassic Traversodontid (Cynodontia, Cynognathia): Anatomical and Paleoecological Implications. [PDF]

J Morphol
In this study, we evaluated an ontogenetic series of the Brazilian traversodontid Siriusgnathus niemeyerorum (Candelária Sequence, Upper Triassic), describing the morphological and allometric changes in its skull during the development. Our findings reveal several trends, including a relative increase in rostrum length, a decrease in orbit size, and ...
Roese-Miron L, Kerber L.
europepmc   +2 more sources

Biomechanical modeling of musculoskeletal function related to the terrestrial locomotion of Riojasuchus tenuisceps (Archosauria: Ornithosuchidae). [PDF]

Anat Rec (Hoboken)
Abstract Riojasuchus tenuisceps was a pseudosuchian archosaur from the Late Triassic period in Argentina. Like other ornithosuchids, it had unusual morphology such as a unique “crocodile‐reversed” ankle joint, a lesser trochanter as in dinosaurs and a few other archosaurs, robust vertebrae, and somewhat shortened, gracile forelimbs.
von Baczko MB, Zariwala J, Ballentine SE, Desojo JB, Hutchinson JR.   +4 more
europepmc   +2 more sources

Autoridades Universidad Nacional de La Plata. Autoridades Instituto del Museo. Académicos honorarios y correspondientes. Premio "Francisco P. Moreno"

Autoridades de la Universidad Nacional de la Plata y del Instituto del Museo, y Académicos Honorarios ...
RMLP, Revista del Museo de La Plata
core   +8 more sources

Hindlimb biomechanics of Lagosuchus talampayensis (Archosauria, Dinosauriformes), with comments on skeletal morphology. [PDF]

J Anat
The study constructs a 3D whole‐body biomechanical model of the Late Triassic archosaurian reptile Lagosuchus talampayensis, which includes reconstructions of the hindlimb musculature. The process of constructing the model revealed that numerous limb bones curated with the main specimens are from other, as‐yet‐undetermined archosaurs.
Otero A, Bishop PJ, Hutchinson JR.
europepmc   +2 more sources

La colección de Tisanópteros del Museo de La Plata. (Insecta)

Revista del Museo de La Plata
Dijimos (De Santis, Gallego de Sureda y Merlo, 1980) en nuestro Estudio sinóptico de los Tisanópteros argentinos, que la colección de esos insectos, existente en el Museo de La Plata, es la más importante del país y una de las que toman en consideración
Luis De Santis, Alicia Gallego, Zulema E. Merlo   +2 more
doaj   +2 more sources

Is xenodontine snake reproduction shaped by ancestry, more than by ecology?

Ecology and Evolution, Volume 7, Issue 1, Page 263-271, January 2017., 2017
The influence of phylogenetic history and ecological factors was tested for the first time in the main reproductive traits of xenodontine snakes. The study focuses on South American Xenodontines snakes, an American endemic clade. The results showed that ancestry or phylogeny explained most of the variation in this community, whereas ecological ...
Gisela P. Bellini, Vanesa Arzamendia, Alejandro R. Giraudo   +2 more
wiley   +1 more source

Evolutionary history of Middle American Rhamdia (Siluriformes: Heptapteridae) inferred from comparative mitogenomic data: Insights on historical biogeography and cave colonization in the group

Journal of Systematics and Evolution, Volume 63, Issue 6, Page 1501-1518, November 2025.
Investigating the systematics and biogeography of Neotropical catfishes of the genus Rhamdia refined phylogenetic hypotheses, including deep paraphyly of Rhamdia laticauda, supported northward dispersal catalyzed by emergence of the Panamanian Isthmus and imply that cave colonization is widespread, convergent, and recent, with established cave‐dwelling
Jairo Arroyave, Adán Fernando Mar‐Silva, Bruno F. Melo, Sonia Gabriela Hernández‐Ávila, Jesús M. López‐Vila, Gabriel S. C. Silva, Píndaro Díaz‐Jáimes   +6 more
wiley   +1 more source

Standing giants: a digital biomechanical model for bipedal postures in sauropod dinosaurs

Palaeontology, Volume 68, Issue 4, July/August 2025.
ABSTRACT Here we explore the potential of sauropod dinosaurs to adopt a bipedal or tripodal stance using digital biomechanical modelling and finite element analysis (FEA). Seven sauropod species from diverse lineages and sizes were sampled, and 3D models of their femora were analysed under both extrinsic (body weight distribution) and intrinsic ...
Julian C. G. Silva Junior, Gabriel S. Ferreira, Agustín G. Martinelli, Thiago S. Marinho, Felipe C. Montefeltro   +4 more
wiley   +1 more source