Showing papers in "Cretaceous Research in 2020"

TL;DR: In this article, the authors established the chronostratigraphy of the Romualdo Formation based on its most complete section in the Araripe Basin, by determining the occurrence of palynomorphs, in particular establishing the vertical range of the species Sergipea variverrucata.

TL;DR: In this paper, the role of aquifer-eustasy in driving Cretaceous short-term cycles by assessing the spatio-temporal pattern of aridity and humidity under differing CO2 forcing in new climate simulations for the Valanginian, Turonian, and Maastrichtian.

TL;DR: This study is the first to evaluate different methodological tools to identify isolated theropod teeth and results of the cladistic and discriminant analyses support the assignment of the tooth associated with MCNA-PV-3137 to an abelisaurid theropid.

TL;DR: The gathering diversity of fossil immature neuropterans already leans towards reflecting a greater diversity and disparity of the group in deep time ‒particularly during the Cretaceous‒ than in modern days, and it is worthy of increased research efforts due to the evolutionary and palaeobiological potential that it holds.

TL;DR: In this paper, the authors present relative abundance data for planktonic foraminifera spanning from the hot greenhouse climate of the Turonian to the cooler greenhouse of the Maastrichtian based on study of Ocean Drilling Program (ODP) holes 690C (Maud Rise), 700B (Northeast Georgia Rise), 1138A (Kerguelen Plateau) and 762C (Exmouth Plateau).

TL;DR: In this article, a floating astronomical time scale (ATS) of the Xiagou Formation was established to determine variations in the sediment accumulation rate (SAR), and the correlation between total organic carbon (TOC) and SARs was investigated to investigate the impact of the SAR on organic matter abundance.

TL;DR: The morphology of the cervical and dorsal vertebrae are re-evaluated and the validity of Spinosaurus maroccanus and Sigilmassasaurus brevicollis are not supported, as all autapomorphies of these taxa are proposed here to be the result of intraspecific variation, or morphological changes through the axial column of a single taxon.

TL;DR: Vallibonavenatrix cani, gen. et al. as mentioned in this paper described a new medium-sized theropod dinosaur from the Arcillas de Morella Formation (upper Barremian) in Vallibona (Castellon, Spain) based on a partial skeleton.

TL;DR: It is shown how beetles from Cretaceous ambers are a useful tool for studying community and trophic structures as well as evolutionary implications for the ecosystem.

TL;DR: A new pterosaur, Afrotapejara zouhrii gen. et al. as discussed by the authors, was described on the basis of a partial rostral fragment from the Cretaceous Kem Kem beds of Takmout, near Erfoud in southern Morocco.

TL;DR: This new cockroach resembles the extant genus Periplaneta, with wide apart eyes, smooth pronotum that wider than long, complex venation in tegmina, long but sparse spines on hind margins of femora, tarsomeres with spines, symmetrical tarsal claws, and long, tapered and segmented cerci.

TL;DR: Dating analyses suggest that crown Corydioidea likely originated in the Late Triassic or Early Jurassic, and test the power of Crenocticola as a node calibration, which is suppressed by the oldest fossil of termites, which may also be crucial in previous studies provided that unjustified fossil calibrations are excluded.

TL;DR: The new family's morphological combination of characters reach beyond the known disparity of the Fulgoroidea, and important morphological characters of new taxa as antennal plaque organs, head and thorax structures, tegmen and wing structure and venation, and terminalia are discussed.

TL;DR: An isolated, partial premaxilla from the Lower Cretaceous (Barremian) Wessex Formation of Yaverland, Isle of Wight, UK is identified as pterosaurian on account of its overall morphology and thin bone walls.

TL;DR: The authors used detrital zircon geochronology (coupling LA-ICP-MS and CA-TIMS) to contextualize the sedimentary history of the Mussentuchit Member within the region of Central Utah and compare these data with previous approaches.

TL;DR: Three fossil species described from mid-Cretaceous Burmese amber reveal high diversity and a much broader distribution of Lenacini during the Cretaceous, and supports growing evidence about the Gondwanan origin of the West Burma Block.

TL;DR: In this article, the Derdere and Karababa formations have been analysed in the Sabunsuyu section (Kilis Province), and five microfacies have been recognized and categorised in three facies groups: inner ramp, mid ramp and outer ramp.

TL;DR: The syninclusions of many specimens from the same species demonstrate that this group of beetles, which today form large aggregations as larval and adult stages to feed on angiosperm flowers, had this aggregation behavior as early as the mid-Cretaceous.

TL;DR: Four new genera and five new species from specimens preserved in mid-Cretaceous amber from the Kachin State of northern Myanmar are described and a new subfamilial rank for hell ants is proposed, i.e., Haidomyrmecinae stat.

TL;DR: A well-preserved pelvis from the Maastrichtian Sânpetru Formation of the Haţeg Basin in Romania has been described in this paper.

TL;DR: The Kem Kem assemblage supports the hypothesis that toothed pterosaurs remained diverse during the mid Cretaceous before disappearing from post-Cenomanian strata.

TL;DR: A new genus and species of edentulous pterodactyloid pterosaur with a distinctive partial rostrum from the mid-Cretaceous Kem Kem beds of southeast Morocco and assigned to Chaoyangopteridae is described.

TL;DR: Analysis of fungus–plant interactions associated with growth ring patterns imply intermittent periods of favorable temperature-moisture inputs that were crucial for fungal activity during the deposition of the Crato fossil Lagerstatte included in the Tropical Equatorial Hot arid belt.

TL;DR: In this paper, a high-resolution biostratigraphic and taxonomic study of planktonic foraminifera performed at Eastbourne (SE England) represents the most expanded, complete and well-calibrated OAE 2 record in Europe.

TL;DR: A palynological analysis of the phosphate succession from the northern flank of the Bou Angueur syncline in the Middle Atlas (central Morocco) is presented in this paper.

TL;DR: This fossil mycelium represents the first fossil fungal record from the Cretaceous of Northeast China, and provides further evidence for investigating the plant-fungal interaction in theCretaceous terrestrial ecosystem.

TL;DR: The chela of R. patrickmuelleri represents probably an early evolutionary stage of pincer wasps close to the basal Dryinidae, whose females were achelate, and is outlined to outline the evolution of the chelae of DryInidae.

TL;DR: In this paper, the authors proposed a coherent framework of 7 biozones, 16 subzones and 6 intervals or horizons based upon the analysis of several outcrop sections and the critical insights of previously published works.

TL;DR: Persiconus sarvaki as mentioned in this paper is a new species of orbitolinid from the Cenomanian of the Sarvak Formation, Zagros Zone, SW Iran, characterized by a high-conical test, a complex embryo situated in an apical position, complex marginal zone (several orders of beams and rafters), and a central zone with a reticulate network of anastomosing main partitions.

TL;DR: The discovery of Bubosa poinari gen. et sp.