Palaeoecological aspects of the diversification of echinoderms in the Lower Ordovician of central Anti-Atlas, Morocco

Lefèbvre, Bertrand; Allaire, Ninon; Guensburg, Thomas E.; Hunter, Aaron W.; Kouraïss, Khaoula; Martin, Emmanuel L.O.; Nardin, Élise; Noailles, Fleur; Pittet, Bernard; Sumrall, Colin D.; Zamora, Samuel

doi:10.1016/j.palaeo.2016.02.039

Cited by 48 publications

(108 citation statements)

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“…3), from the middle Tremadocian (A. victoriae Zone) to the middle Floian (?B. jacksoni Zone) (Lefebvre et al, 2016b A. victoriae graptolite Zones) yielded extremely few remains of marine invertebrates (rare specimens of inarticulate brachiopods, trilobites, and graptolites), with the remarkable exception of locally abundant accumulations of fully articulated thecae of Rhopalocystis (Fig. 3, locality 1737 = 1738 = 1750, A. victoriae Zone, middle Tremadocian; Destombes, 2006;Allaire et al, 2015;Lefebvre et al, 2016b).…”

Section: Geological Settingmentioning

confidence: 99%

“…In recent years, the Fezouata Shale Formation (Tremadocian to Floian) has yielded numerous exquisitely preserved echinoderm assemblages (or echinoderm Lagerstätten sensu Smith, 1988), which document the early stages of the Great Ordovician Biodiversification Event (Noailles et al, 2010;Lefebvre et al, 2016b).…”

Section: Introductionmentioning

confidence: 99%

“…The stratigraphic and paleobiogeographic distribution of Rhopalocystis are so far restricted to the Lower Ordovician (middle Tremadocian to middle Floian) of the Agdz-Zagora area (central Anti-Atlas, Morocco; Allaire et al, 2015;Lefebvre et al, 2016b). In the past 50 years, these levels have yielded hundreds of remarkably well-preserved specimens (Ubaghs, 1963;Chauvel, 1971Chauvel, , 1978Chauvel and Régnault, 1986;Allaire et al, 2015;Lefebvre et al, 2016b).…”

Section: Introductionmentioning

confidence: 99%

“…In the past 50 years, these levels have yielded hundreds of remarkably well-preserved specimens (Ubaghs, 1963;Chauvel, 1971Chauvel, , 1978Chauvel and Régnault, 1986;Allaire et al, 2015;Lefebvre et al, 2016b).…”

Section: Introductionmentioning

confidence: 99%

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Morphological disparity and systematic revision of the eocrinoid genusRhopalocystis(Echinodermata, Blastozoa) from the Lower Ordovician of the central Anti-Atlas (Morocco)

Allaire¹,

Lefèbvre²,

Nardin³

et al. 2017

J. Paleontol.

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Section: Geological Settingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Morphological disparity and systematic revision of the eocrinoid genusRhopalocystis(Echinodermata, Blastozoa) from the Lower Ordovician of the central Anti-Atlas (Morocco)

Allaire¹,

Lefèbvre²,

Nardin³

et al. 2017

J. Paleontol.

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“…Composite, synthetic log of the Lower Ordovician succession in the Ternata plain, north of Zagora (Central Anti‐Atlas, Morocco; modified from Lefebvre et al . ; Vaucher et al . ).…”

mentioning

confidence: 99%

Age calibration of the Lower Ordovician Fezouata Lagerstätte, Morocco

Lefèbvre

Gutiérrez-Marco

Lehnert

et al. 2018

LET

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The Fezouata Lagerstätte, discovered in the Lower Ordovician rocks of Morocco, is a Konservat‐Lagerstätte of prime scientific importance. It provides access not only to the ‘shelly’ (skeletonized) part of its fossil assemblages, but also to non‐biomineralized to lightly sclerotized organisms and to exceptionally preserved soft tissues of a complex ecosystem, mixing elements of both the ‘Cambrian Explosion’ and the ‘Great Ordovician Biodiversification Event’ (GOBE). The Fezouata Lagerstätte occurs at different intervals in the Fezouata Shale, a formation ranging from the lower Tremadocian to the upper Floian (Lower Ordovician). In spite of recent major advances in the detailed biostratigraphy of the Fezouata Shale, there is currently no consensus on the precise age of the fossiliferous levels yielding exceptionally preserved assemblages. Consequently, all available biostratigraphical evidence based on several fossil groups is here critically reviewed and discussed. It can be concluded that exceptional preservation is restricted to a few thin, discontinuous, lens‐shaped horizons occurring in two distinct parts of the Fezouata Shale: a lower interval (260–330 m above the base of the formation) and an upper interval (570–620 m). Integrated biostratigraphical studies, essentially based on investigations of graptolites, acritarchs and conodonts, indicate that the lower interval can be correlated with the upper Tremadocian, whereas the upper interval corresponds to the middle Floian.

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The taphonomy of a trilobite fauna from an uppermost Katian echinoderm Lagerstätte in South West Wales

McCobb¹,

McDermott²,

Owen³

2019

Fossils and Strata

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Palaeoecological aspects of the diversification of echinoderms in the Lower Ordovician of central Anti-Atlas, Morocco

Cited by 48 publications

References 100 publications

Morphological disparity and systematic revision of the eocrinoid genusRhopalocystis(Echinodermata, Blastozoa) from the Lower Ordovician of the central Anti-Atlas (Morocco)

Morphological disparity and systematic revision of the eocrinoid genusRhopalocystis(Echinodermata, Blastozoa) from the Lower Ordovician of the central Anti-Atlas (Morocco)

Age calibration of the Lower Ordovician Fezouata Lagerstätte, Morocco

The taphonomy of a trilobite fauna from an uppermost Katian echinoderm Lagerstätte in South West Wales

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