Results 51 to 60 of about 30,004 (307)

Yuruma Formation (Barremian - lower Aptian?) In the Yuruma hill and Punta Espada, Alta Guajira, Uribia, Colombia

Boletín Geológico, 2021
The Yuruma Formation in the Yuruma hill area its type locality can be differentiated into two stratigraphic intervals. The lower and upper intervals of the Yuruma Formation can also be subdivided into two segments.
Pedro Patarroyo
doaj   +1 more source

Taxonomic reassessment of fossil Sequoia and Protosequoia from the Upper Miocene of Central Honshu, Japan, with implications for leaf morphological variation in extant S. sempervirens

American Journal of Botany, EarlyView.
Abstract Premise Since its emergence in the Mesozoic, Sequoia (Cupressaceae) has been considered to possess conserved leaf morphology. However, recent studies have shown that the leaves of extant S. sempervirens become smaller, with a scale form, with increasing tree height.
Shun Ikeda, Arata Momohara
wiley   +1 more source

A perspective from the Mesozoic: Evolutionary changes of the mammalian skull and their influence on feeding efficiency and high‐frequency hearing

The Anatomical Record, EarlyView.
Abstract The complex evolutionary history behind modern mammalian chewing performance and hearing function is a result of several changes in the entire skeletomuscular system of the skull and lower jaw. Lately, exciting multifunctional 3D analytical methods and kinematic simulations of feeding functions in both modern and fossil mammals and their ...
Julia A. Schultz
wiley   +1 more source

Phylogeny, histology and inferred body size evolution in a new rhabdodontid dinosaur from the Late Cretaceous of Hungary. [PDF]

, 2012
Rhabdodontid ornithopod dinosaurs are characteristic elements of Late Cretaceous European vertebrate faunas and were previously collected from lower Campanian to Maastrichtian continental deposits.
Weishampel, D. B., Edina Prondvai (133973), Weishampel, DB, Ősi, A, Weishampel, David B., Prondvai, Edina; id_orcid, Butler, Richard, Ősi, Attila, Weishampel, David, David B. Weishampel (133978), Richard Butler (133975), Richard Butler, Prondvai, Edina, Butler, R, Attila Ősi, David B Weishampel, Edina Prondvai, Butler, R. J., Prondvai, E, Butler, Richard; id_orcid, Attila Ősi (109378)   +20 more
core   +1 more source

The coelurosaur theropods of the Romualdo formation, early Cretaceous (Aptian) of Brazil: Santanaraptor placidus meets Mirischia asymmetrica

The Anatomical Record, EarlyView.
Abstract The upper carbonate concretion levels of the Romualdo Formation (Aptian, Brazil) have yielded several theropod dinosaur remains, including spinosaurids and the coelurosaurs Santanaraptor placidus and Mirischia asymmetrica, the phylogenetic affinities of which are controversial.
Rafael Delcourt, Orlando Nelson Grillo, Christophe Hendrickx, Maximilian Kellermann, Max Cardoso Langer   +4 more
wiley   +1 more source

A new pterosaur (Pterodactyloidea: Azhdarchidae) from the Upper Cretaceous of Morocco

, 2010
The Kem Kem beds in South Eastern Morocco contain a rich early Upper (or possibly late Lower) Cretaceous vertebrate assemblage. Fragmentary remains, predominantly teeth and jaw tips, represent several kinds of pterosaur although only one species, the ...
David M Unwin, Baidder, Lahssen, David M Martill, Ibrahim, Nizar, Lahssen Baidder, D. M. Martill (4169125), Ibrahim Nizar, Unwin David M., S. Zouhri (7618280), Baidder Lahssen, Zouhri Samir, N. Ibrahim (7618271), L. Baidder (7618277), Martill, David M., Nizar Ibrahim, Samir Zouhri, Zhouri, Samir, Unwin, David M., Martill David M., David M. Unwin (7618274)   +19 more
core   +2 more sources

Nikolay Ivanovitch Karakash - an outstanding scientist-naturalist

Известия высших учебных заведений: Геология и разведка, 2015
The 2016 year is a year of the 100th anniversary of the death of the outstanding Russian geologist and paleontologist, one of the first investigators of Cretaceous deposits of Crimea and Caucasus, Nikolay Ivanovitch Karakash.
V. N. Komarov
doaj   +1 more source

The reinstated identity of agglutinated foraminifer Campanellula capuensis from the Lower Cretaceous of southern Italy by means of a 3D model investigation

Acta Palaeontologica Polonica, 2023
Campanellula capuensis was described as belonging to the Trochamminacea (trochospiral tests) and later transferred to the genus Orbitolinopsis of the Orbitolinidae (uniserial tests).
FELIX SCHLAGINTWEIT, SABRINA AMODIO, FILIPPO BARATTOLO, MICHEL SEPTFONTAINE   +3 more
doaj   +1 more source

An ontological morphological phylogenetic framework for living and extinct ray‐finned fishes (Actinopterygii)

The Anatomical Record, EarlyView.
Abstract The ray‐finned fishes include one out of every two species of living vertebrates on Earth and have an abundant fossil record stretching 380 million years into the past. The division of systematic knowledge of ray‐finned fishes between paleontologists working on extinct animals and neontologists studying extant species has obscured the ...
Jack Stack
wiley   +1 more source

Histology and fossil diagenesis of a pterosaur tooth from the Crato Formation (Lower Cretaceous of Brazil)

The Anatomical Record, EarlyView.
Abstract Pterosaur dental biology remains poorly understood despite its importance for comprehending feeding strategies and flight adaptations. Here, we present the first comprehensive histological analysis of an ornithocheiriform pterosaur tooth from the Lower Cretaceous Crato Formation (Santana Group, Northeast Brazil).
Tito Aureliano, Matheus P. S. Rocha, Francisco P. Lima‐Filho, Aline M. Ghilardi   +3 more
wiley   +1 more source