Neoteny is widespread in extant Caudata and has also been inferred in extinct temnospondyls. Here, we compare osteohistology, microanatomy, and life history traits of the Permian branchiosaurid Apateo...

The present study deals with the remains of family Tragulidae collected from the Chinji Formation (Lower Siwalik subgroup; late Middle Miocene) deposits of the Chabbar Syedan, Jhelum, Punjab, Pakis...

Sauropod dinosaurs were the largest terrestrial animals to have ever lived on Earth. However, in the initial evolutionary stages of sauropod gigantism, few fossils are known. In China, most non-sau...

This study investigates the apotropaic meaning of a fossil purchased in 1994 in a souk in Marrakesh, Morocco. The specimen is an internal mould of an infaunal Jurassic bivalve (Pleuromya cf. uniformis...

The only recorded member of the bird-like Troodontidae from Early Cretaceous North America is Geminiraptor suarezarum, known from an isolated maxilla recovered from the Suarez Site bonebed of the basa...

Late Triassic forests in Central Europe developed under a seasonal sub-tropical climate while the supercontinent Pangea was breaking up. Although permineralized fossil wood from this interval is abun...

New anatomical evidence reclassifies Westlothiana as an aquatic stem tetrapod, showing that terrestrial limb adaptations evolved mosaically in transitional amphibious environments before crown tetrapo...

Abstract. The Silurian ‘maxillate placoderms’ Entelognathus primordialis and Qilinyu rostrata were previously described as possessing a single dermal operc

Marine subsidization (MS) of terrestrial ecosystems, in the form of marine-derived organic matter, energy, and nutrients, is a well-known phenomenon on moder...

Microraptorines were bird-like dinosaurs that possessed some flight adaptations. A new fossil species from the early Cretaceous, Norellraptor barsboldi, suggests that this group evolved their own flig...

A rostral beak, a highly keratinized tissue covering the perioral region of the skull, has been hypothesized for many sauropodomorphs and eusauropods over the past few decades by several authors, base...

The Ediacaran fossil Edrathina obditchia gen. et sp. nov., is considered herein to be a large soft bodied metazoan with a bauplan that conforms most closely ...

In 1946 Gilmore observed that the Hell Creek Formation component of the larger TT-zone of the late Maastrichtian contained more tyrannosaur taxa than just titanic Tyrannosaurus rex, based on a small, ...

Thylacosmilids are a clade of metatherian predators known from lower Miocene to upper Pliocene strata of South America. They had highly specialized skulls with enlarged canines. Here, we describe r...

Recently, Mexico has become a significant area for research on Cretaceous Crossognathiformes. Despite this, most Mexican crossognathiforms remain undescribed, and their relationships have not been ...

The fate of supposed plesiosaur vomit from Jurassic delta deposits offshore Norway - Volume 163

Nineteenth century excavations of the Ciply-Malogne Phosphatic Chalk Formation in Hainaut, Belgium, yielded over 50 partial mosasaur skeletons, the majority of which were referred to the species Mosa....

Tyrannosaur feeding behavior evinced from hadrosaurian dinosaur remains in the Aguja Formation (Upper Cretaceous), Big Bend National Park, Texas, USA

Procolophonidae was one of the most successful parareptile clades during the Triassic, becoming widespread across Pangea in the aftermath of the End-Permian Mass Extinction (EPME). The Lower Triass...

Elasmobranchs are excellent candidates for biostratigraphy, with distinctive dentitions and wide distributions over a long period of time. However, the high variation in tooth shapes present within...

The Late Cretaceous (Maastrichtian) Lameta Formation of central and western India is well known for its rich dinosaurian fossil assemblage, particularly titanosaurian remains. In central India, the...

The dormice (Gliridae) are a family of rodents currently represented by 29 extant species, but with a greater fossil diversity stretching back to the early Eocene. The extant forms are generally sm...

The extinction event at the Cretaceous-Tertiary boundary wiped out numerous marine and terrestrial groups of species. The penetration depth of the Chicxulub ...

Scientific Reports - Morphology of the Devonian mandibulate arthropod Rhyniognatha and its implications for the timing of insect evolution

The present study describes three new species and two new genera of lungfish from the Upper Jurassic (Tithonian) of the Aliança Formation (Jatobá Basin), in the state of Pernambuco, northeastern Br...

The dinosaur fossil record from Mexico is sparsely documented since most of it is fragmentary remains with little taxonomic information and a lot of it conti...

We reconstruct the major cranial musculature of the giant stem amphibian Mastodonsaurus giganteus, revealing a differentiated jaw-adductor system, a probable sesamoid pulley, and previously unrecogni....

Despite an extensive history of study, quantitative constraints on the thermophysiology of Tyrannosaurus rex remain limited. Here, we derive a thermodynamically based determination of T. rex body temp...

He et al. describe Yujingia, a new early Cambrian ambulacrarian with differentiated appendages that include pinnate arms with filter-feeding grooves. The morphology and phylogenetic position of Yujing...

A new fossil cnidarian, Mycozoon insolitum, from the early Cambrian Chengjiang biota, south China, is interpreted as a macroscopic jellyfish bearing a tough umbrella and a well-defined digestive syste...

Sauropod teeth are among the most abundant vertebrate fossils recovered from the Upper Jurassic to Lower Cretaceous Khorat Group of Thailand. However, their taxonomic and palaeoecological significa...

The interval spanning Marine Isotope Stages (MIS) 12 to 9 represents a key phase of the Pleistocene, marked by pronounced climatic oscillations and high‑amplitude glacial–interglacial transitions. ...

Gastrochaenolites is a clavate boring produced primarily by endolithic bivalves in lithic substrates. Here, we documented this trace fossil from multiple stratigraphic intervals in Iran: Upper Cret...

This study reports artiodactyl fossil remains from a newly discovered locality near Drebh village in the Sulaiman Range, South Punjab, Pakistan. The recovered assemblage includes representatives of...

A new species of the genus Argillochelys (Testudines: Pan-Cheloniidae), A. foveopalatus sp. nov. is described based on a partial skull and two dentary symphyses from the Karakeshi and Monata locali...