Results 31 to 40 of about 91,036 (273)

New Early Cretaceous pentatomorph bugs from China and the systematic position of Kobdocoridae [PDF]

open access: yesActa Palaeontologica Polonica
Kobdocoridae is an extinct family of the infraorder Pentatomomorpha, mainly distributed in the Eurasia and currently comprise only nine species from seven genera in three locations.
RUI DAI   +4 more
doaj   +1 more source

Fission track ages and Mesozoic tectonic uplift in the Niushoushan-Luoshan area on the western edge of the Ordos Basin

open access: yesDizhi lixue xuebao, 2023
The western margin of the Ordos Basin and its adjacent regions have undergone a complex tectonic evolution from the Mesozoic to the Cenozoic era. However, the question of tectonic uplift since the Cenozoic era remains a topic of contention, and the ...
TIAN Zhaoyang   +5 more
doaj   +1 more source

First record of chimaeroid fish Ischyodus from the Upper Jurassic of southwestern Gondwana [PDF]

open access: yesActa Palaeontologica Polonica, 2021
This study presents two specimens of Chimaeriformes from Upper Jurassic strata of central Chile. The material was recovered from Tithonian levels of the Baños del Flaco Formation and includes two different individuals, one preserving two articulated ...
Rodrigo A. Otero   +5 more
doaj   +1 more source

Indigenous demosponge spicules in a Late Devonian stromatoporoid basal skeleton from the Frasnian of Belgium [PDF]

open access: yes, 2014
This paper records the first example of a demosponge spicule framework in a single specimen of a Devonian stromatoporoid from the Frasnian of southern Belgium.
Alvarez   +51 more
core   +1 more source

Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications

open access: yesAgrociencia Uruguay, 2022
Petrographic analyses are presented for the Rivera, Tacuarembó and Cuchilla Ombú formations, which constitute the outcropping Guaraní Aquifer System in the Rivera and Tacuarembó departments, Uruguay.
Paula Collazo   +2 more
doaj   +1 more source

Late Triassic (Rhaetian) conodonts and ichthyoliths from Chile [PDF]

open access: yes, 2000
The Late Triassic of the back arc Domeyko Basin, Chile is characterized by the onset of marine sedimentation that persisted throughout the rest of the Mesozoic.
Sansom, Ivan J.
core   +1 more source

Paleoproteomics of Mesozoic Dinosaurs and Other Mesozoic Fossils

open access: yesPROTEOMICS, 2019
AbstractMolecular studies have contributed greatly to our understanding of evolutionary processes that act upon virtually every aspect of living organisms. However, these studies are limited with regard to extinct organisms, particularly those from the Mesozoic because fossils pose unique challenges to molecular workflows, and because prevailing wisdom
Mary Higby Schweitzer   +3 more
openaire   +4 more sources

DNA sequence evidence for speciation, paraphyly and a Mesozoic dispersal of cancellothyridid articulate brachiopods [PDF]

open access: yes, 2002
Because the classification of extant and fossil articulate brachiopods is based largely upon shell characters observable in fossils, it identifies morphotaxa whose biological status can, in practice, best be inferred from estimates of genetic divergence.
Cohen, B.L., Luter, C.
core   +1 more source

Integrated phylogenomic and fossil evidence of stick and leaf insects (Phasmatodea) reveal a Permian–Triassic co-origination with insectivores [PDF]

open access: yesRoyal Society Open Science, 2020
Stick and leaf insects (Phasmatodea) are a distinctive insect order whose members are characterized by mimicking various plant tissues such as twigs, foliage and bark.
Erik Tihelka   +4 more
doaj   +1 more source

Continued evaluation of potential for geologic storage of carbon dioxide in the southeastern United States [PDF]

open access: yes, 2011
Southern States Energy Board Duke Energy Santee Cooper Power Southern CompanyBureau of Economic ...
Breton, C. A.   +5 more
core   +1 more source

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