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Résultats de recherche
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Poster (unpublished)
The Fezouata brachiopod fauna: an Early Ordovician diversification at high latitudes
Brachiopods are a neglected part of the Fezouata fauna. Brachiopods occur in two distinct horizons: firstly in the lower part of the Fezouata Shale (upper Tremadocian); secondly in the upper part of the Fezouata Shale (lower Floian). The fauna is dominated by a mixture of lingulides, siphonotretides and orthides. The...Candela, Yves ; Harper, David T ; Mergl, Michal
Ordovician outcrops , Fezouata fauna, Brachiopods, and Morocco
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Abstract
Brachiopods from the Ordovician of southern Belgium (Avalonia): the end of a terra incognita
Contrary to the well-exposed Devonian–Carboniferous rock sequence, the thick siliciclastic Cambrian–Silurian succession of Belgium is poor in macrofossils and, more especially, in brachiopods. These rocks mostly crop out in the Brabant and the Stavelot–Venn massifs, and in the Condroz Inlier. Occurrences of Ordovician brachiopods have been reported since the second...Mottequin, Bernard ; Candela, Yves
Avalonia, brachiopods, Belgium, and Ordovician
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Journal article
Middle and Upper Ordovician linguliformean and craniiformean brachiopods from the Brabant Massif, Belgium: Infaunal giants, encrusting forms and durophagy
Linguliformean and craniiformean brachiopods from the Middle and Upper Ordovician of the Brabant Massif (Belgium) are described for the first time and their palaeoecological and palaeobiogeographical implications are discussed. The restricted and generally poorly preserved material was collected from the Abbaye de Villers (Dapingian–Darriwilian) Formation and from the Katian Huet...Candela, Yves ; Mottequin, Bernard
Linguliformean and craniiformean brachiopods , palaeobiogeographical , Middle and Upper Ordovician, Brabant Massif , and palaeoecological
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Journal article
Evolutionary trends in trimerellid brachiopods
Non-articulated trimerellides, one minor group among the largest brachiopods, are commonly found in massive monospecific accumulations in Ordovician and Silurian rocks. In this paper, all species of the family Trimerellidae are listed for the first time, and some of them are discussed. They appeared in the Sandbian and became extinct...Chen, Di ; Huang, Bing ; Candela, Yves
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Journal article
New machaeridian data from the Upper Ordovician of Scotland: palaeoecological and global palaeobiogeographical implications
New machaeridian material housed in the National Museum of Scotland alongside the type material held in the Natural History Museum London and the Sedgwick Museum of Earth Sciences, Cambridge, is documented here from the Ordovician of Girvan. The specimens are included in four taxa, three of these in open nomenclature.... -
Journal article
Evolutionary trends in trimerellid brachiopods
Non-articulated trimerellides, one minor group among the largest brachiopods, are commonly found in massive monospecific accumulations in Ordovician and Silurian rocks. In this paper, all species of the family Trimerellidae are listed for the first time, and some of them are discussed. They appeared in the Sandbian and became extinct...Chen, Di ; Huang, Bing ; Candela, Yves
morphospace and phylogenetic analyses, evolution, brachiopods, and trimerellides
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Journal article
Evolutionary trends in trimerellid brachiopods
Non-articulated trimerellides, one minor group among the largest brachiopods, are commonly found in massive monospecific accumulations in Ordovician and Silurian rocks. In this paper, all species of the family Trimerellidae are listed for the first time, and some of them are discussed. They appeared in the Sandbian and became extinct...Chen, Di ; Huang, Bing ; Candela, Yves
Morphospace, Trimerellids, Platform, Vault, and Cladistics
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Journal article
Revision of the Llandovery (lower Silurian) trimerellide brachiopod Yidurella in South China
Although a minor group of brachiopods in the Ordovician and Silurian, the trimerellides include some of the largest known brachiopods in the Early Paleozoic. Yidurella Zeng, a monospecific genus of moderate size from the Shamao Formation of Tizikou, Yidu City, Hubei Province, was originally described as having a solid platform....Chen, Di ; Huang, Bing ; Candela, Yves
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Journal article
New fossil assemblages from the Early Ordovician Fezouata Biota
The Fezouata Biota (Morocco) is a unique Early Ordovician fossil assemblage. The discovery of this biota revolutionized our understanding of Earth’s early animal diversifications—the Cambrian Explosion and the Ordovician Radiation—by suggesting an evolutionary continuum between both events. Herein, we describe Taichoute, a new fossil locality from the Fezouata Shale. This...Saleh, Farid ; Vaucher, Romain ; Vidal, Muriel ; Hariri, Khadija El ; Laibl, Lukáš …
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Journal article
The Ordovician diversification of sea urchins: systematics of the Bothriocidaroida (Echinodermata: Echinoidea)
The echinoids of the order Bothriocidaroida represent the initial burst of sea urchin diversification. They were the first echinoids to achieve widespread biogeographical dispersal and achieved high levels of species richness compared to other clades of stem group echinoids. Following long-standing controversy regarding their phylogenetic affinities within the phylum Echinodermata,...Thompson, Jeffrey R ; Cotton, Laura J ; Candela, Yves ; Kutscher, Manfred ; Reich, Mike …
extinction, phylogeny, Bothriocidaris, sea urchin, Bayesian, and Neobothriocidaris
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Conference paper (unpublished)
IGCP 735 (2021-2025): rocks and the rise of Ordovician life: filling knowledge gaps in the Early Palaeozoic biodiversification (Rocks n'ROL)
Deciphering the complex interactions between climate change, biodiversity and ecosystem structuration is a major societal issue for future generations. The geological record offers the unique opportunity to document the impact of environmental changes in the biosphere in the past, and thus to provide some clues for the future. In this...Lefebvre, Bertrand ; Candela, Yves ; Hariri , Khadija ; Ghobadi Pour , Mansoureh ; Raevskaya, Elena …
stratigraphy , biodiversity, IGCP project , palaeobiogeography, Ordovician , and databases
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Journal article
Tremadocian and Floian (Ordovician) linguliformean brachiopods from the Stavelot–Venn Massif (Avalonia; Belgium and Germany)
Lower Ordovician linguliformean brachiopods from the Stavelot–Venn Massif (Belgium and Germany) are described systematically for the first time. The material comprises specimens from the Jalhay (Solwaster Member) and Ottré (Les Plattes Member) formations of Tremadocian and Floian ages, respectively. The Solwaster Member yielded a relatively diverse assemblage of nine species...Candela, Yves ; Mottequin, Bernard
Germany, Lingulida, Siphonotretida, Ordovician, Belgium, Acrotretida, and brachiopods
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Book chapter
Biodiversity, biogeography and phylogeography of Ordovician rhynchonelliform brachiopods
The phylogeographical evolution and the consequent changing distribution and diversity of rhynchonelliform brachiopods through the Ordovician are linked to the dynamic palaeogeography of the period. The Early Ordovician (Tremadocian and Floian) is characterized by globally low-diversity faunas with local biodiversity epicentres, notably on the South China Palaeoplate; low-latitude porambonitoid-dominated faunas...Harper, David A T ; Rasmussen, Christian M Ø ; Liljeroth, Maria ; Blodgett, Robert B ; Candela, Yves …
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Journal article
New linguliformean brachiopods from the lower Tremadocian (Ordovician) of the Brabant Massif, Belgium, with comments on contemporaneous faunas from the Stavelot-Venn Massif
Lower Ordovician brachiopod macrofaunas in Belgium (Avalonia) are seldom collected and studied due to the poor preservation of material. Here we describe a new fauna of linguliformean brachiopods from the Chevlipont Formation (lower Tremadocian) in the Brabant Massif. The fauna is of low diversity (at least three species belonging to...Candela, Yves ; Marion, Jean-Marc ; Servais, Thomas ; Wang, Wenhui ; Wolvers, Mark …
Brachiopoda, Avalonia, low diversity, palaeogeography, and Chevlipont Formation
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Journal article
Late Ordovician (Katian) brachiopods from the Southern Uplands of Scotland: biogeographic patterns on the edge of Laurentia
Some 40 brachiopod species are known from the localities of Kilbucho and Wallace’s Cast in the Kirkcolm Formation in the Northern Belt of the Southern Uplands of Scotland. The fauna is diverse despite the relatively small numbers of brachiopod specimens (c. 180) available for study. Much of the fauna was...Candela, Yves ; Harper, David A T
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Journal article
Phylogenetic relationships of leptellinid brachiopods
The relationships among the diverse genera comprising the family Leptellinidae (Brachiopoda) are reviewed in the light of the revised edition of the Treatise on Invertebrate Palaeontology. Taxonomic work reassessed all the genera identified as Leptellinidae in the most current classification. Four genera were discarded, namely Bekkerella, Benignites, Leptastichidia and Nikitinamena....Candela, Yves
Biogeography, taxor, cladistics, Palaeozoic, Ordovician, Leptellinidae, taxonomy, and Brachiopoda
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Journal article
A systematic revision of the Ordovician plectambonitoidean brachiopods Chonetoidea and Sericoidea
The revised Treatise on Invertebrate Paleontology, part H: Brachiopoda regards Chonetoidea Jones and Sericoidea Lindström synonymic, on the basis of characters that were considered common to both genera (e.g. ornament type, number of septules). However, some features (e.g. number of septules) discriminate specimens at species level, rather than at generic...Candela, Yves
functional morphology, ecology, distribution, Sericoidea association, and taxonomy
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Journal article
Brachiopod associations from the Middle Ordovician of the Oslo Region, Norway
The marine upper Darriwilian (Middle Ordovician) Elnes Formation of southern Norway contains very rich and diverse invertebrate faunas. Stratigraphically detailed recent collections of these well-preserved faunas have permitted a more thorough description of the various faunal groups and their preferences in the late Middle Ordovician of the Oslo Region, southern...Candela, Yves ; Hansen, T.
brachiopod, deposition, Oslo region, Ordovician, and association