Results 181 to 190 of about 8,694 (221)

A complete insect from the Late Devonian period

Nature, 2012
After terrestrialization, the diversification of arthropods and vertebrates is thought to have occurred in two distinct phases, the first between the Silurian and the Frasnian stages (Late Devonian period) (425-385 million years (Myr) ago), and the second characterized by the emergence of numerous new major taxa, during the Late Carboniferous period ...
Garrouste, Romain, Clément, Gaël, Nel, Patricia, Engel, Michael S., Grandcolas, Philippe, d'Haese, Cyrille, Lagebro, Linda, Denayer, Julien, Gueriau, Pierre, Lafaite, Patrick, Olive, Sébastien, Prestianni, Cyrille, Nel, André   +12 more
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A Late Devonian actinopterygian suggests high lineage survivorship across the end-Devonian mass extinction

Nature Ecology & Evolution, 2022
Many accounts of the early history of actinopterygians (ray-finned fishes) posit that the end-Devonian mass extinction had a major influence on their evolution. Existing phylogenies suggest this episode could have acted as a bottleneck, paring the early diversity of the group to a handful of survivors.
Sam Giles, Kara Feilich, Rachel C. M. Warnock, Stephanie E. Pierce, Matt Friedman   +4 more
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Late Devonian acanthodians from Colombia

Journal of South American Earth Sciences, 2003
Acanthodian remains occur in micaceous siltstone lenses (presumed to have been deposited during a marine incursion) in the Cuche Formation (?Frasnian) of northeast Colombia. The acanthodians are represented by patches of scales from climatiidid Nostolepis sp. cf. N. gatijensis and a fin spine and scales from a new diplacanthid.
Burrow, Carole J., Janvier, Philippe, Villarroel, Carlos   +2 more
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Climate of the Late Devonian to Triassic

Palaeogeography, Palaeoclimatology, Palaeoecology, 1993
Abstract Remarkable changes are apparent in climate during Late Devonian-Triassic times. Mostly the climate was rather different from the present. The faunas and floras offer much evidence for understanding the climate but, in turn, understanding the palaeogeography of the faunas and floras is dependent on understanding the climate and the changes in
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Palaeobiogeography of Famennian (Late Devonian) bryozoans

Palaeogeography, Palaeoclimatology, Palaeoecology, 2010
Abstract Bryozoans were widely distributed in marine habitats of the Famennian (Late Devonian) worldwide. This time interval was marked by gradual change in taxonomic composition of bryozoan faunas, which were insignificantly affected by global events (Upper Kellwasser, Handerberg). Distribution of bryozoan faunas was controlled by intrinsic factors (
Zoya Tolokonnikova, Andrej Ernst
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Biogeography of Late Silurian and Devonian acritarchs and prasinophytes

Review of Palaeobotany and Palynology, 1997
Abstract The palaeobiogeography of Late Silurian-Devonian acritarch and prasinophyte microfloras is assessed using qualitative data, similarity indexes and cluster analysis. Based on the recent palaeogeographic reconstructions, the northwards movement of Gondwana initiated during the Ludlovian with the progressive narrowing of the Rheic ocean ...
Alain le Hérissé, Rémy Gourvennec, Reed Wicander   +2 more
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Microtektites and Mass Extinctions: Evidence for a Late Devonian Asteroid Impact

Science, 1992
Glass spherules, similar to microtektites, have been found near the Frasnian-Famennian boundary (F/F) (Upper Devonian) at Senzeilles, Belgium, contemporaneous with one of the largest marine mass extinctions of the Phanerozoic. These spherules exhibit a wide range of compositions and display teardrop, dumbbell, and compound morphologies analogous to ...
Claeys, Philippe, Casier, Jean-Georges, Margolis, Stanley V.   +2 more
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Late Devonian glaciation in South America

Palaeogeography, Palaeoclimatology, Palaeoecology, 1985
Abstract An ice age in Famennian (Late Devonian) time is documented by the presence of diamictites with striated, faceted and polished pebbles; rhythmites with dropstones; erratic boulders; and striated pavements and deformed sandstones. The glacigenic beds occur in three huge intracratonic basins (Solimoes, Amazonas and Parnaiba) and in one ...
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Pseudoextinctions in late Devonian proetide trilobites

Historical Biology, 1994
Morphologically similar proetide trilobite genera occur in highest Devonian or lowest Carboniferous and in Middle Devonian strata, but are absent from the intervening Upper Devonian. The similarities have been accounted for either by true phyletic relationship, or by homoeomorphy.
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Late Devonian sphenopsid shows evidence of aquatic adaptations

Current Biology
Vascular plants diversified and adapted to various terrestrial environments during the Silurian and Devonian periods and had formed complex forests by the Middle and Late Devonian1. However, fossil evidence of functional adaptations to aquatic environments remains scarce, from forms with only submerged subterranean parts to fully submerged types ...
Le, Liu, Yi, Zhou, Pu, Huang, Min, Qin, Li, Liu, Peng, Xu, De-Ming, Wang   +6 more
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