Results 61 to 70 of about 2,661 (202)

New craniodental materials of Falcarius utahensis (Theropoda: Therizinosauria) reveal patterns of intraspecific variation and cranial evolution in early coelurosaurians

The Anatomical Record, Volume 309, Issue 8, Page 1995-2048, August 2026.
Abstract Despite documented ecomorphological shifts toward an herbivorous diet in several coelurosaurian lineages, the evolutionary tempo and mode of these changes remain poorly understood, hampered by sparse cranial materials for early representatives of major clades. This is particularly true for Therizinosauria, with representative crania best known
William J. Freimuth, Lindsay E. Zanno
wiley   +1 more source

Isotopic signals from late Jurassic–early Cretaceous (Volgian–Valanginian) sub-Arctic belemnites, Yatria River, Western Siberia

, 2016
This contribution presents the first detailed oxygen and carbon isotope record from the latest Jurassic–early Cretaceous interval of the Yatria River, subpolar Urals, Siberia.
G.D. Price (2844791), J. Mutterlose (2844794)   +1 more
core   +1 more source

The first ornithocheiromorph humerus from Wuerho (Urho), China, with a new isotopic age of the Tugulu Group [PDF]

Anais da Academia Brasileira de Ciências
Pterosaur remains are rare from the lowermost Cretaceous, hampering our understanding of the taxonomic and morphological diversities of pterosaurs during this period.
JUNYI SONG, YUTING ZHONG, SHUNXING JIANG, XIAOLIN WANG   +3 more
doaj   +1 more source

Is Coccodontoidea valid? The systematic placement of the armoured Lebanese pycnodonts within Pycnodontiformes and the utility of homoplasy in resolving relationships using cladistic principles

Papers in Palaeontology, Volume 12, Issue 4, July/August 2026.
Abstract Although well studied since their discovery in the late 18th century, pycnodont fishes have undergone comparatively few phylogenetic analyses despite large numbers of new taxa being discovered in this diverse order. Two recently discovered families from the Late Cretaceous (Cenomanian) of Lebanon, Gladiopycnodontidae and Gebrayelichthyidae ...
John J. Cawley, Eduardo Villalobos‐Segura, Jürgen Kriwet   +2 more
wiley   +1 more source

Revision of Valanginian Steinmanellinae bivalves from the Neuquén basin, West-central Argentina, and their biostratigraphic implications [PDF]

, 2013
We present a new species of Steinmanella Crickmay from the Valanginian of the Neuquén Basin, west-central Argentina, and at the same time update a Valanginian-earliest Barremian bivalve zonation which is integrated into the local, Chilean and European ...
Lazo, Dario Gustavo, Luci, Leticia
core   +1 more source

The Valanginian Weissert Event on the south Tethyan margin: a dynamic paleoceanographic evolution based on the study of calcareous nannofossils.

, 2022
21 pagesInternational audiencePaleoceanographic conditions across the Valanginian Weissert oceanic anoxic event were reconstructed for the first time on the central Moroccan margin from a quantitative-based calcareous nannofossil study.
Giraud, F., Reboulet, S., Jaillard, E., Masrour, M., Spangenberg, J.E., Shmeit, Majd, Shmeit, M., El-Samrani, A., F. Giraud, S. Reboulet, M. Masrour, J.E. Spangenberg, A. El-Samrani, E. Jaillard, M. Shmeit   +14 more
core   +1 more source

Deep marine red beds of the Valanginian- Hauterivian (Lower Cretaceous) of East Greenland: palaeoceanographic implications

, 2004
red beds, Valanginian, Hauterivian, East Greenland ...
Surlyk, Finn, Alsen, Peter
core   +1 more source

Southern hemisphere early cretaceous (Valanginian-Early barremian) carbon and oxygen isotope curves from the neuquen basin, Argentina [PDF]

, 2008
The first carbon and oxygen isotope curves for the Valanginian to Early Barremian (Early Cretaceous) interval obtained from outcrops in the Southern Hemisphere are presented.
Kalin, Robert M., Lazo, Dario G., Aguirre-Urreta, Maria B., Price, Gregory D., Rawson, Peter F., Ogle, Neil, Ruffell, Alastair H.   +6 more
core   +3 more sources

Spatial and Temporal Distribution of Salt‐ and Shale‐Detached Contractional Deformation, Mexican Northwestern Gulf of Mexico

Tectonics, Volume 45, Issue 7, July 2026.
Abstract In the northwestern Gulf of Mexico, gravity‐driven contractional deformation is recorded across the Salina del Bravo, the Perdido and Peripheral fold belts, and the Mexican Cordilleras. Integrating seismic interpretation, structural mapping, and analysis, we examine the spatial and temporal partitioning of shortening above three principal ...
F. A. Rodriguez‐Roa, M. G. Rowan, J. A. Muñoz   +2 more
wiley   +1 more source

Calcareous nannofossils absolute abundance and accumulation rates from sediment core BGS81-43 (late Valanginian - late Hauterivian), North Sea

, 2019
Calcareous nannofossils absolute abundance and accumulation rates from sediment core BGS81-43 (late Valanginian - late Hauterivian), North ...
Fabienne Giraud (2840888), Bernard Pittet (7184771), Emanuela Mattioli (7184768), Giraud, Fabienne, Pittet, Bernard, Julien Plancq (6974549), Baptiste Suchéras-Marx (6982523), Allemand, Pascal, Plancq, Julien, Pascal Allemand (6982526), Suchéras-Marx, Baptiste, Gilles Escarguel (7184774), Mattioli, Emanuela, Escarguel, Gilles   +13 more
core   +1 more source