Results 11 to 20 of about 1,085 (131)

The lower jaw of Devonian ray-finned fishes (Actinopterygii): Anatomy, relationships, and functional morphology. [PDF]

Anat Rec (Hoboken)
Abstract Actinopterygii is a major extant vertebrate group, but limited data are available for its earliest members. Here we investigate the morphology of Devonian actinopterygians, focusing on the lower jaw. We use X‐ray computed tomography (XCT) to provide comprehensive descriptions of the mandibles of 19 species, which span the whole of the Devonian
Igielman B, Figueroa RT, Higgins RR, Pierce SE, Coates MI, Troyer EM, Fernandez V, Dollman K, Lu J, Zhu M, Friedman M, Giles S.   +11 more
europepmc   +2 more sources

Surgical Treatment of Coronoid Fracture With Elbow Varus Posteromedial Rotatory Instability: An Instructional Review. [PDF]

Orthop Surg
Schematic drawings for the mechanism of elbow varus posteromedial rotatory instability. ABSTRACT Varus posteromedial rotatory instability (VPMRI) of the elbow is one of the complex elbow instability. The primary sites of injury encompass fractures of the anteromedial coronoid process and injuries to the lateral collateral ligament of the elbow.
Zhang X, Wang Y, Li X.
europepmc   +2 more sources

Lungfish-like antero-labial tooth addition and amphibian-like enameloid-enamel transition in the coronoid of a Devonian stem actinopterygian. [PDF]

J Anat
The tooth patterning logic, which cannot be inferred from surface morphology, is revealed by visualizing buried tooth remnants in 3D. The primary teeth are added labially, initially organized in radial rows, which transition into linear rows where the coronoid becomes slender.
Chen D.
europepmc   +2 more sources

Expanding Chemistry of Expanded Helicenes. [PDF]

Chemistry
This review presents recent advances in the chemistry of expanded helicenes, defined as helicenes containing linearly fused benzene rings, as novel aromatic compounds. This review begins with a summary of their structural classification, followed by the synthesis, structures, properties, and chiroptical performance of expanded helicenes of various ...
Toyota S.
europepmc   +2 more sources

Aristonectes quiriquinensis, sp. nov., a new highly derived elasmosaurid from the upper Maastrichtian of central Chile [PDF]

, 2014
This paper describes a new species of elasmosaurid plesiosaur, Aristonectes quiriquinensis, sp. nov., based on a partial skeleton recovered from upper Maastrichtian beds of the Quiriquina Formation of central Chile.
O'gorman, Jose Patricio, O'Keefe, Frank Robin, Otero, Rodrigo A., Quinzio Sinn, Luis Arturo, Rubilar-Rogers, David, Salazar, Christian, Soto Acuña, Sergio, Stinnesbeck, Wolfgang, Suárez, Mario E.   +8 more
core   +4 more sources

Biomechanical Research of Three Parallel Cannulated Compression Screws in Oblique Triangle Configuration for Fixation of Femoral Neck Unstable Fractures. [PDF]

Orthop Surg
In this study, 20 fourth‐generation Sawbone femurs were used to evaluate the fixation mechanics of two screw space configurations (OTC triangle configuration and IETC inverted equilateral triangle configuration) for femoral neck fractures. During the experiment, static load test and cyclic load test were carried out on FNF specimens after internal ...
Zhang RY, Zhang WP, Yang GM, Wang DF, Su P, Zhang Y, Nie SB, Li J, Zhao Z, Li JT, Zhang LC, Tang PF.   +11 more
europepmc   +2 more sources

THE OSTEOLOGY OF ALIORAMUS, A GRACILE AND LONG-SNOUTED TYRANNOSAURID (DINOSAURIA: THEROPODA) FROM THE LATE CRETACEOUS OF MONGOLIA [PDF]

, 2012
Fig. 68: Closeup of right ilium of the holotype specimen of Alioramus altai (IGM 100/1844) in lateral view. Scale bar 5 5 cm. Abbreviations as in figure 66.Published as part of Brusatte, Stephen L., Carr, Thomas D.
Brusatte, Stephen L., Carr, Thomas D., Norell, Mark A.   +2 more
core   +1 more source

Freshwater amphibians and squamates from Villeveyrac (lower Campanian; Hérault, France): palaeodiversity, palaeoenvironment and implications for the Late Cretaceous palaeobiogeography of the European herpetofauna

Papers in Palaeontology, Volume 12, Issue 1, January/February 2026.
Abstract The Late Cretaceous witnessed numerous transgression–regression sequences and the onset of a global cooling phase at the start of the Campanian. In the European archipelago, these environmental changes, combined with active plate tectonics, facilitated the formation of ephemeral land bridges that served as dispersal routes for a variety of ...
Olivier Jansen, Géraldine Garcia, Olga Otero, Marc Augé, Bernard Gomez, Xavier Valentin   +5 more
wiley   +1 more source

Anatomical Variations of the Temporalis Muscle: A Magnetic Resonance Imaging–Based Study

BioMed Research International, Volume 2026, Issue 1, 2026.
Introduction The temporalis muscle is a key masticatory muscle involved in jaw movement, specifically in the elevation and retraction of the mandible. This muscle has a complex anatomical structure, which includes both superficial and deep layers that are vital for its function.
Adrian Okoń, Ingrid C. Landfald, Michał Podgórski, Roman Frach, George Triantafyllou, Łukasz Olewnik, Andrea Lovato   +6 more
wiley   +1 more source

Calcified Chondroid Mesenchymal Neoplasm of the Temporomandibular Joint: A Rare and Recently Described Benign Tumor

Case Reports in Otolaryngology, Volume 2026, Issue 1, 2026.
The calcified chondroid mesenchymal neoplasm (CCMN) was first recognized as a distinct pathologic entity in 2021 at the University of Washington, and fewer than 100 cases of CCMN have been described in the literature. The CCMN tumor is characterized by the presence of chondroid matrix elements with an FN1–receptor TK gene fusion. CCMNs frequently arise
Jiaxin Yuan, Tyler Lazaro, Laligam N. Sekhar, Kevin C. Lee, Parth Bhardwaj   +4 more
wiley   +1 more source