Results 1 to 10 of about 459 (134)
Substrate type and palaeodepth do not affect the Middle Jurassic taxonomic diversity of crinoids [PDF]
PeerJ, 2021 Crinoids are largely considered as good indicators for determining environmental conditions. They are robust proxies for inferring changes in salinity and sedimentation rate and for inferring substrate type. Some crinoid groups (e.g., certain comatulids,
Mariusz A. Salamon +5 more
doaj +3 more sources
Historical significance and taxonomic status of Ischyrodon meriani (Pliosauridae) from the Middle Jurassic of Switzerland [PDF]
PeerJ, 2022 Ischyrodon meriani is an obscure pliosaurid taxon established upon an exceptionally large tooth crown of a probable Callovian (Middle Jurassic) age that originates from Wölflinswil, Canton of Aargau, Switzerland.
Daniel Madzia +2 more
doaj +3 more sources
Gondwanan cyrtocrinids uncover hidden diversity and crinoid dispersal pathways [PDF]
Scientific ReportsThe post-Palaeozoic crinoid order Cyrtocrinida exhibits remarkable morphological diversity and ecological versatility, yet its fossil record from southern continents remains fragmentary and poorly understood.
Mariusz A. Salamon +5 more
doaj +2 more sources
Jurassic bivalves from the Spiti area of the Himalayas, northern India [PDF]
Zitteliana, 2022 The present study describes and illustrates six bivalve taxa from the Early Bathonian to Early Callovian Ferruginous Oolite Formation and 24 taxa from the Callovian to basal-most Cretaceous Spiti Shale Formation of the Spiti and Zanskar areas in the ...
Franz T. Fürsich +3 more
doaj +3 more sources
Geo&Bio, 2021 The aim of the study was the taxonomic, morphological, ecological and stratigraphic characterization of marine invertebrate groups from the localities of Wiek and Wysoka (Krakow-Częstochowa Upland) and Gnieździska (Świętokrzyskie Mountains). All of these
S. Wszelaki
doaj +1 more source
Acta Palaeontologica Polonica, 2023 The rare Middle Jurassic ammonite Oecoptychius refractus is revisited based on material collected in southern Poland (Ogrodzieniec quarry) and France (St.-Laon near Loudun, western France). Based on available data and an evaluation of the literature, O.
SREEPAT JAIN +3 more
doaj +1 more source
Lepisosteiform fish (Holostei) ganoid scales from the middle jurassic deposits of Ukraine
Zoodiversity, 2020 Gars (Lepisosteiformes) flourished in epicontinental seas throughout the world during the second half of Mesozoic and early Cenozoic. Cretaceous and Paleogene remains of these fishes are common in Europe while their Jurassic fossils are still relatively ...
О. М. Kovalchuk, G.V. Anfimova
doaj +1 more source
Youngest occurrences of rhomaleosaurid plesiosaurs indicate survival of an archaic marine reptile clade at high palaeolatitudes [PDF]
Acta Palaeontologica Polonica, 2015 Rhomaleosaurid plesiosaurians were a common and ecologically significant component of Early Jurassic marine faunas, primarily as large-bodied predators. They declined in abundance and made their last fossil appearance in the Middle Jurassic. However, the
Roger B.J. Benson +2 more
doaj +1 more source
Lithosphere, 2022 The Amu Darya Right Bank Block is located northeast of the Amu Darya basin, a large petroliferous sedimentary basin, with abundant natural gas resources in carbonate rocks under the ultra-thick gypsum-salt layer.
Yunpeng Shan +8 more
doaj +1 more source
A new pliosaurid from the Oxford Clay Formation of Oxfordshire, UK
Acta Palaeontologica Polonica, 2022 We describe the anatomy of a new longirostrine pliosaurid, Eardasaurus powelli gen. et sp. nov., based on a substantially complete skeleton from the Middle Jurassic Oxford Clay Formation of Oxfordshire, UK.
HILARY F. KETCHUM, ROGER B.J. BENSON
doaj +1 more source