Results 41 to 50 of about 2,942 (266)

Contribución al conocimiento de los mamíferos fósiles de los terrenos terciarios antiguos del Paraná por Florentino Ameghino (memoria cuarta) [PDF]

, 1883
1 v. (13, 49, 205, 226 p.) ; 24 cmRecopilación de 4 estudos sobre mamíferos fósiles de Florentino Ameghino publicados en el "Boletín de la Academia Nacional de Ciencias de Cordoba" entre 1883 y 1886Contén ademáis con port. propia : I.
Ameghino, Florentino
core  

Dental crown morphological variation and heterodonty in carcharhiniform sharks

The Anatomical Record, EarlyView.
Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Flávia Zanini, Karla D. A. Soares
wiley   +1 more source

Megalonychidae Ameghino 1889

, 1982
Published as part of James H. Honacki, Kenneth E. Kinman & James W. Koeppl, 1982, Order Edentata, pp. 52-57 in Mammal Species of the World (1 st Edition), Lawrence, Kansas, USA :Alien Press, Inc.
James H. Honacki, Kenneth E. Kinman, James W. Koeppl   +2 more
openaire   +2 more sources

Diaphorocetus Ameghino 1894

, 2023
Genus Diaphorocetus Ameghino, 1894 TYPE SPECIES. — Mesocetus poucheti Moreno, 1892, by monotypy, known from a single specimen thought to originate from Burdigalian deposits of the Gaiman Formation, in the Chubut province, Argentina (see Paolucci et al. 2020 for the complex taxonomic history of this species). OTHER REFERRED SPECIES.
Lambert, Olivier, Collareta, Alberto, Benites-Palomino, Aldo, Merella, Marco, Muizon, Christian de, Bennion, Rebecca, Urbina, Mario, Bianucci, Giovanni   +7 more
openaire   +2 more sources

THE LELONG THÉVENET COLLECTION AND ITS FINAL DESTINATION: RECOVERY OF TYPE AND REFERRED MATERIALS OF CINGULATES DESCRIBED BY AMEGHINO

Publicación Electrónica de la Asociación Paleontológica Argentina
At the end of the 19th century, Ameghino studied the fossils of the “conglomerado osífero” (Late Miocene, Paraná, Entre Ríos, Argentina), erecting at least 13 new species of cingulates.
Laura Edith Cruz, Juan Carlos Fernicola
doaj   +1 more source

An unusual titanosaur axis from the Upper Cretaceous of Brazil and its significance for sauropod anatomy and systematics

The Anatomical Record, EarlyView.
Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro, Jeffrey A. Wilson Mantilla, Jhonata H. A. Martins, Fabiano V. Iori, Leonardo S. Paschoa, Alberto B. Carvalho, Joseli M. Piranha, Hussam Zaher   +7 more
wiley   +1 more source

Comparative cranial biomechanics reveal macroevolutionary trends in theropod dinosaurs, with emphasis on Tyrannosauroidea

The Anatomical Record, EarlyView.
Abstract Tyrannosaurus is viewed as a model organism in vertebrate paleontology, with numerous studies analyzing its feeding biomechanics. Nonetheless, the evolution of this feeding performance has been under‐addressed in Tyrannosauroidea, especially in basal tyrannosauroids. Here we used muscle‐force reconstruction and finite element analysis (FEA) to
Evan Johnson‐Ransom, Paul Gignac, Daniel E. Barta, Ryan N. Felice, Eric Snively   +4 more
wiley   +1 more source

REVISITING THE CRETACEOUS LUNGFISH ATLANTOCERATODUS IHERINGI (AMEGHINO 1898) FROM THE MATA AMARILLA FORMATION (ARGENTINA) WITH COMMENTS ON TOOTH PLATES HISTOLOGY

Rivista Italiana di Paleontologia e Stratigrafia
Atlantoceratodus iheringi (Ameghino 1898) from Argentine territory is restudied based on its known tooth plates and newly discovered material, which includes previously unknown skull roof bones and vomerine tooth plates.
Karen M. Panzeri
semanticscholar   +1 more source

Osteohistology of two phorusrhacids reveals uninterrupted growth strategy

The Anatomical Record, EarlyView.
Abstract Phorusrhacidae were apex predators that primarily dominated South America ecosystems for at least 40 million years with their imposing size and predatory lifestyle—yet some aspects of their biology remain poorly understood. Osteohistology is a tool for understanding growth dynamics and biomechanical adaptations.
Lotta Dreyer, Christian Cooper, Jingmai O'Connor   +2 more
wiley   +1 more source

Primeros registros de Cachalote Castaño (Pseudoseisura lophotes) en Dique Ameghino, Chubut, y los más australes reportados hasta el presente

Nuestras Aves
El Cachalote Castaño (Pseudoseira lophotes) se distribuye por el sur de Sudamérica, hasta las provincias de Río Negro y Neuquén. En esta nota presento registros de la especie en la localidad Dique Florentino Ameghino, provincia de Chubut, Argentina ...
Cristina Bartolucci
semanticscholar   +1 more source