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1 taxa, with a long fossil record back to the Ordovician.
2 cooling intervals - at least during the Late Ordovician.
3 ering by non-vascular vegetation in the Late Ordovician.
4 s back from the Devonian, Pennsylvanian, and Ordovician.
5 ta that have been separated since the middle Ordovician.
6 e were most likely, the top predators of the Ordovician.
7 itself was greatest in the Middle and Upper Ordovician.
8 ars until their extinction at the end of the Ordovician.
10 n common in the shells of mollusks since the Ordovician (450 million years ago) and is abundant and w
11 a severely injured trilobite from the Middle Ordovician ( 465 Ma) accords with a number of similar ob
12 We dated the origin of insects to the Early Ordovician [~479 million years ago (Ma)], of insect flig
13 s from decomposed meteorites occur in middle Ordovician (480 million years ago) marine limestone over
14 ccurrence of anomalocaridids, from the Early Ordovician (488-472 million years ago) Fezouata Biota in
16 bably occurred in the late Cambrian to early Ordovician, an estimate that is independent of their pro
17 a behaved as a cohort, declining through the Ordovician and disappearing at the end-Ordovician mass e
18 ock Fauna radiated rapidly during the Middle Ordovician and gave rise to all post-Ordovician trilobit
21 of predation traces increased notably by the Ordovician, and not in the mid-Paleozoic as suggested by
24 zation during the late Ediacaran through the Ordovician (approximately 550 to 444 million years ago)
25 ptionally preserved communities in the Welsh Ordovician are also sponge-dominated, suggesting a regio
27 influx of meteorites to Earth during the mid-Ordovician, as previously indicated by fossil meteorites
28 f these communities continued into the Early Ordovician at high latitude, but our understanding of ec
29 en the Cambrian Explosion (CE) and the Great Ordovician Biodiversification Event (GOBE) have long bee
30 nding of ecological changes during the Great Ordovician Biodiversification Event (GOBE) is currently
32 tinued through much of the Ordovician (Great Ordovician Biodiversification Event), the search for an
39 lobal cooling events, such as Middle to Late Ordovician cooling and glaciation associated with the cl
43 GOBE) is currently limited by the paucity of Ordovician exceptionally preserved open-marine faunas.
45 lite resurgence also occurred after the Late Ordovician extinction event in western North America.
46 new anomalocaridid specimens from the Early Ordovician Fezouata Biota of Morocco, which not only sho
47 ctonic principle is illustrated by the early Ordovician Grampian Orogeny in the British and Irish Cal
49 n yr later and continued through much of the Ordovician (Great Ordovician Biodiversification Event),
51 ears, particularly during the Cretaceous and Ordovician, hydrothermal fluids had more seawater-derive
52 first unambiguous evidence for a sudden Mid Ordovician icehouse, comparable in magnitude to the Quat
53 ities shows a continuous increase during the Ordovician in both shallow- and deep-marine environments
54 e interrelated factors: (i) a Middle to Late Ordovician increase in available hard substrates for bio
56 hypothesis, I show that 11 of 13 major post-Ordovician innovations appeared first or only on land.
57 , are here described from rocks of the Upper Ordovician Katian Stage Lorraine Group of New York State
58 marine shelly assemblages ranging from Early Ordovician (Late Tremadoc) to Carboniferous, have proved
60 the inter-regional distribution patterns of Ordovician Laurentian ostracods, focussing particularly
63 harp change in extinction regime in the Late Ordovician marked the onset of repeated severe spikes in
64 y trends and taxonomic rates during the Late Ordovician mass extinction and Early Silurian recovery.
66 al studies and a global analysis of the Late Ordovician mass extinction that accounts for variations
68 most extreme episode of extinction, the Late Ordovician Mass Extinction, old species were selectively
75 Fossilized fungal hyphae and spores from the Ordovician of Wisconsin (with an age of about 460 millio
76 e Lower and Upper Fezouata Formations (Lower Ordovician) of Morocco, which include a range of remarka
77 ld predominantly originate on land after the Ordovician once organisms had conquered the challenges o
81 nequivocal demonstration of ostracods in the Ordovician period, including the oldest known myodocope,
83 largest nektonic animals of the Cambrian and Ordovician periods, are generally thought to have been a
85 ong control on biodiversification: after the Ordovician Radiation, genus richness did not trend for h
88 , focussing particularly on the diverse Late Ordovician Sandbian (ca 461 to 456 Ma) faunas, demonstra
91 f land plants (embryophytes) consists of mid-Ordovician spore tetrads (approximately 476 Myr old).
93 y Kiaman (Carboniferous-Permian) and Moyero (Ordovician) superchrons, providing a window into the geo
94 ckground" extinction, which dominated in the Ordovician, taxonomic evolutionary rates were relatively
95 s operating within Laurentia during the Late Ordovician: the Taconian Orogeny and GICE related global
96 the Cambrian, reaching a zenith in the Late Ordovician, then a short-lived but prominent withdrawal
98 arine bivalve and brachiopod genera from the Ordovician through to the Recent while simultaneously ac
99 eased global chemical weathering in the Late Ordovician, thus reducing atmospheric CO2 concentration
101 mbrian time and of a wide ocean basin during Ordovician time indicates that the Precordillera travele
103 s traditionally placed in the group Mitrata (Ordovician to Carboniferous periods, 530-280 million yea
105 size and power) rose substantially from the Ordovician to the Quaternary period, whereas the size of
107 sis of the stratigraphic distribution of all Ordovician trilobite families, based on a comprehensive
109 y more ventilated marine habitats during the Ordovician, ultimately establishing complex ecosystems t
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