Results 161 to 170 of about 3,102 (219)

Extreme lower jaw elongation in a placoderm reflects high disparity and modularity in early vertebrate evolution. [PDF]

open access: yesR Soc Open Sci
Jobbins M   +6 more
europepmc   +1 more source

Geochronology of the Early Triassic based on coupled Bayesian zircon eruption age and Bayesian age-depth models. [PDF]

open access: yesProc Natl Acad Sci U S A
Dai X   +14 more
europepmc   +1 more source

Thermal and nutrient stress drove Permian-Triassic shallow marine extinctions. [PDF]

open access: yesCamb Prism Extinct
Foster WJ   +5 more
europepmc   +1 more source

Comprehending conodonts

open access: yesGeology Today, 2015
Conodonts were small, thin, elongate jawless creatures that were a common component of the marine fauna from the late Cambrian, throughout the Palaeozoic and into the Triassic. For the majority of conodont research history, speculations on conodont affinity were restricted to the histology and arrangement of their mineralized tissues—‘conodont elements’
Barham, Milo
openaire   +3 more sources
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ʻConodont pearlsʼ do not belong to conodonts

Lethaia, 2021
We investigated the mineralogical and chemical signatures of enigmatic microspherules commonly recovered in conodont residues and referred to in literature as 'conodont pearls.' Comparison between these 'pearls,' associated conodonts and other phosphatic skeletal elements present in the same stratigraphical level was run in an effort to reveal any ...
Ferretti A   +4 more
openaire   +2 more sources

The conodont controversies

Trends in Ecology & Evolution, 1996
The discovery of fossilized conodont soft tissues has led to suggestions that these enigmatic animals were among the earliest vertebrates and that they were macrophagous, using their oropharyngeal skeletal apparatus to capture and process prey. These conclusions have proved controversial.
Aldridge, RJ, Purnell, MA
openaire   +3 more sources

Conodont Pearls?

Science, 1976
Conodonts are zoologically enigmatic, toothlike phosphatic microfossils occurring in marine sedimentary rocks ranging in age from Cambrian to Triassic. Dimpled spheres of less than 1 millimeter in diameter are sporadic associates of conodonts and have identical chemical composition and microstructure.
B F, Glenister, G, Klapper, K M, Chauff
openaire   +2 more sources

Conodonter

Varv, 1992
Intet ...
Rasmussen, J.A., Stouge, S.
openaire   +1 more source

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