Pliosauridae is a globally distributed clade of aquatic predatory amniotes whose fossil record spans from the Lower Jurassic to the Upper Cretaceous. However, the knowledge of pliosaurid interrelationships remains limited. In part, this is a consequence of a few key taxa awaiting detailed reassessment. Among them, the taxon Polyptychodon is of special importance. It was established on isolated ...

Sampling of six horizons quartz-glauconite sands in Kaniv dislocations Ukraine yielded more than three thousand vertebrate specimens, including elasmobranch teeth, chimaera dental plates, actinopterygian and sauropsid teeth bones. Our study represents the first illustrated detailed description from Ukrainian Albian deposits since Rogovich (1861), whose specimens were still preserved collections...

A review of the Southern Hemisphere Mesozoic tribosphenic mammal fossil record supports hypothesis that Tribosphenida arose in during Early Jurassic, around 50 million years prior to clade’s reliably dated first appearance Northern Hemisphere. mammals are known from Australia, Madagascar, South America and Indian subcontinent, classified into three families: Bishopidae (fam. nov.), Ausktribosph...

Atolls are faithful recorders helping us understand eustatic variations, the evolution of carbonate production through time, and changes in magmatic hotspots activity. Several early Cretaceous Mid-Pacific atolls were previously investigated ocean drilling, but due to low quality vintage seismic data available, few spatial constraints exist on their stratigraphic large-scale diagenesis. Here, we...

The stratigraphy of the upper Fredericksburg and lower Washita groups northern Texas southern Oklahoma is described, biostratigraphical correlation within region, further afield, using microcrinoids, ammonites, planktonic foraminiferans inoceramid bivalves summarised. taxonomy roveacrind microcrinoids revised by senior author, a new genus, Peckicrinus , with type species Poecilocrinus porcatus ...

Ocean Drilling Program Leg 210 was devoted to studying the history of rifting and postrift sedimentation in the Newfoundland–Iberia rift. Drilling was conducted in the Newfoundland Basin along a transect conjugate to previous drilling on the Iberia margin (Legs 149 and 173). This was the first time that deep-sea drilling has been conducted on both sides of a nonvolcanic rift in order to underst...

The purpose of this paper is to characterize the configuration northern Tunisia’s basin during Cretaceous on basis abundant slump folds and frequent synsedimentary faults. are studied determine slumps transport vergence submarine paleoslope. local regional stress field used syn-sedimentary deformation. During Valanginian–Aptian times, characterized by southward slope. From Albian Santonian anal...

Recent evidence for feathers in theropods has led to speculations that the largest tyrannosaurids, including Tyrannosaurus rex, were extensively feathered. We describe fossil integument from Tyrannosaurus and other tyrannosaurids (Albertosaurus, Daspletosaurus, Gorgosaurus and Tarbosaurus), confirming that these large-bodied forms possessed scaly, reptilian-like skin. Body size evolution in tyr...

Based on specimens originally referred to as "Dastilbe minor", a nomem-nudum, we describe a new genus of Chanidae †Nanaichthys longipinnus nov. gen. and sp. which exhibits several diagnostic characters such as the absence of orbitosphenoid and basisphenoid, anteriorly displaced quadrate-mandibular articulation, laterally expanded supraneurals, an acute angle between the preopercular limbs, expa...