Results 21 to 30 of about 72,611 (345)

Temporal patterns in disparity and diversity of the Jurassic ammonoids of southern Germany [PDF]

open access: yesFossil Record, 2011
A morphometric analysis of the characteristic whorl cross-sections of 1,200 Jurassic ammonoid species from southern Germany enabled us to characterise their morphospace.
M. S. Simon, D. Korn, S. Koenemann
doaj   +5 more sources

A Synoptic Review of the Cartilaginous Fishes (Chondrichthyes: Holocephali, Elasmobranchii) from the Upper Jurassic Konservat-Lagerstätten of Southern Germany: Taxonomy, Diversity, and Faunal Relationships

open access: yesDiversity, 2023
The Late Jurassic-Early Cretaceous (164–100 Ma) represents one of the main transitional periods in life history. Recent studies unveiled a complex scenario in which abiotic and biotic factors and drivers on regional and global scales due to the ...
Eduardo Villalobos-Segura   +7 more
doaj   +1 more source

A giant pliosaurid skull from the late Jurassic of England. [PDF]

open access: yesPLoS ONE, 2013
Pliosaurids were a long-lived and cosmopolitan group of marine predators that spanned 110 million years and occupied the upper tiers of marine ecosystems from the Middle Jurassic until the early Late Cretaceous.
Roger B J Benson   +6 more
doaj   +1 more source

Tip dating supports novel resolutions of controversial relationships among early mammals [PDF]

open access: yes, 2020
The estimation of the timing of major divergences in early mammal evolution is challenging due to conflicting interpretations of key fossil taxa. One contentious group is Haramiyida, the earliest members of which are from the Late Triassic.
Beck, RMD, King, B
core   +2 more sources

Late Jurassic salamandroid from western Liaoning, China [PDF]

open access: yesProceedings of the National Academy of Sciences, 2012
A Jurassic salamander, Beiyanerpeton jianpingensis (gen. et sp. nov.), from a recently found site in western Liaoning Province, China is the earliest known record of Salamandroidea. As a Late Jurassic record of the group, it extends the range of the clade by ~40 Ma.
Ke-Qin, Gao, Neil H, Shubin
openaire   +2 more sources

A turiasaurian sauropod dinosaur from the Early Cretaceous Wealden Supergroup of the United Kingdom [PDF]

open access: yesPeerJ, 2019
The Jurassic/Cretaceous (J/K) boundary, 145 million years ago, has long been recognised as an extinction event or faunal turnover for sauropod dinosaurs, with many ‘basal’ lineages disappearing.
Philip D. Mannion
doaj   +2 more sources

Palaeobiogeographical implications of the first fossil wood flora from the Jurassic of Turkey [PDF]

open access: yesActa Palaeontologica Polonica, 2022
We describe Jurassic fossilized woods from the Gümüşhane and Erzurum regions of Turkey that represent the eastern Sakarya Zone (eSZ) terrestrial biota. We collected 27 fossil wood fragments in total.
ÜNAL AKKEMİK   +4 more
doaj   +1 more source

New ophthalmosaurid ichthyosaurs from the European lower cretaceous demonstrate extensive ichthyosaur survival across the Jurassic–Cretaceous boundary [PDF]

open access: yes, 2012
Background Ichthyosauria is a diverse clade of marine amniotes that spanned most of the Mesozoic. Until recently, most authors interpreted the fossil record as showing that three major extinction events affected this group during its history: one ...
A Sirotti   +91 more
core   +12 more sources

Late Jurassic–Early Cretaceous marine deoxygenation in NE Greenland [PDF]

open access: yesJournal of the Geological Society, 2023
The Late Jurassic–Early Cretaceous interval represents a prolonged marine deoxygenation period particularly in the Boreal–Arctic basins, the controlling factors of which remain poorly understood. Two drill cores totalling >450 m cover the Kimmeridgian–Barremian succession in contrasting locations in an evolving half-graben system (basin
J. Hovikoski   +11 more
openaire   +2 more sources

Home - About - Disclaimer - Privacy