Early Middle Devonian trilobites and events in the Nismes – Vireux-Molhain area, southern border of the Dinant Synclinorium (Belgium, northern France)

Viersen, Allart P. Van; Taghon, Peter; Magrean, Benedikt

doi:10.20341/gb.2019.001

Cited by 2 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In total, the asteropyginids, in spite of their distinctive morphologies, seem to represent a clade that is drifting through glabellar morphospace, showing no concerted patterns, other than a steady increase in glabellar disparity as diversity increased, followed by a steady decline and then the blinking out of glabellar disparity as the diversity of the subfamily and family declined, with the entire order it belongs to eventually disappearing at the end of the Devonian (Feist 1991; Bignon and Crônier 2013; Crônier 2013; Van Viersen 2013; Bignon et al 2014; Van Viersen and Bignon 2018; Van Viersen and Vanherle 2018; Bault et al 2022a). A key question in any clade's history is the extent to which the changing patterns of disparity through time are related to patterns of speciation as opposed to extinction (Guillerme et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Morphological evolution during the last hurrah of the trilobites: morphometric analysis of the Devonian asteropyginid trilobites

Martin¹,

Carranza²,

LaVine³

et al. 2022

Paleobiology

View full text Add to dashboard Cite

The Asteropyginae Delo, 1935 is a group of phacopid trilobites in the family Acastidae Delo, 1935 that has served as the focus for several studies due to their distinctive morphologies and diversity. However, despite an interest in these characteristic morphologies, there have been no studies that have examined this group using morphometric techniques. Our investigation utilized both geometric morphometric and elliptical Fourier methods to quantify the morphology of cephalic sclerites of asteropyginid specimens representing wide taxonomic sampling of the clade. We constructed a phylomorphospace that shows temporal and spatial patterns of phenotypic evolution within the framework of a novel tip-dated phylogenetic tree generated using Bayesian inference. We recovered similar patterns in disparity regardless of the morphometric approach. Both analyses illustrated a marked expansion into morphospace throughout the temporal range of the clade, peaking in disparity in the Emsian and with European taxa exhibiting the highest disparity in glabellar morphospace. Additionally, glabellar shape showed low phylogenetic signal and no major patterns in phylomorphospace. This study highlights the utility of employing different methodologies to quantitatively explore the disparity of fossil taxa. It also illustrates some of the patterns of morphological change occurring during one of the final and major evolutionary radiations within Phacopida.

show abstract

Section: Discussionmentioning

confidence: 99%

Morphological evolution during the last hurrah of the trilobites: morphometric analysis of the Devonian asteropyginid trilobites

Martin¹,

Carranza²,

LaVine³

et al. 2022

Paleobiology

View full text Add to dashboard Cite

show abstract

“…Carbonate intercalations are rare and fossils are often dissolved and exposed as moults. The famous 'Mur des Douaniers' trilobite locality in Vireux (France) exposes these facies (Dumoulin & Blockmans, 2008;Van Viersen et al, 2019). The upper half of the member is dominantly silty with some carbonate levels (coquina beds, possibly corresponding to tempestites) that yields a more diverse fauna (trilobites, brachiopods, orthocerids, gastropods, Cystiphylloides).…”

Section: Vieux Moulin Membermentioning

confidence: 99%

“…Recently Van Viersen et al (2019) introduced the 'Vieux Moulin event' to describe a horizon rich in well-preserved trilobites. However, this event has no impact neither on fauna nor on deposition and has only a very local extension.…”

Section: Correlation With Global Eventsmentioning

confidence: 99%

Revised stratigraphy of the Eifelian (Middle Devonian) of southern Belgium: sequence stratigraphy, global events, reef development and basin structuration

Denayer

2019

Geol. Belg.

View full text Add to dashboard Cite

The Eifelian lithostratigraphic succession of southern Belgium is here revised based on new field investigations and reconsideration of biostratigraphic data. The Couvin Formation is divided into four members: the Villers-la-Tour Member recorded the onset of stromatoporoid biostromes, the Petigny Member is a dark fine-grained limestone that recorded the Choteč event, the Cul d'Efer Member is dominated by stromatoporoid-coral biostromes. These first three members were previously united in the Foulerie Member and correspond to the transgressive and highstand system tracts of the Middle Devonian 3 rd -order sequence MD1. The argillaceous and bioclastic successive units of the Abîme Member recorded the sequence MD2. Laterally, this sequence is only composed of siliciclastic deposits of the Vieux Moulin, Station and Cimetière members of the Jemelle Formation. The highstand system tract is the newly introduced carbonate Vierves Member. Large bioherms, newly described as the Wancennes Formation, recorded the first two sequences MD1 and MD2. A major sequence boundary caps the Couvin Formation and is overlaid by the transgressive and diachronous Chavées Member of the Jemelle Formation with a depositional gap increasing eastwards. The highstand system tract of sequence MD3 is recorded in the bioherms of the Tienne Sainte-Anne Member (upper part of the Jemelle Formation), also capped by a sequence boundary. These bioherms probably acted as highs around which the sandy deposits of the Lomme Formation accumulated as lowstand system tract of sequence MD4. The Hanonet Formation and its crinoidal Wellin Member form the transgressive system tracts of sequence MD4 that terminates in the bioclastic and biohermal Trois-Fontaines Formation (Givetian). The Kačák event is identified in the transgressive system tract of this sequence. The geographic distribution of facies and of reefs in particular led to the recognition of at least six sedimentation areas corresponding most probably to synsedimentary faulted blocks here defined as the Eau Blanche, Viroin, Lesse, Ourthe, Condroz and Sambre blocks. These sedimentation areas structured the Namur-Dinant Basin and recorded distinct depositional history and were probably active during the Devonian and Carboniferous interval.

show abstract

Early Middle Devonian trilobites and events in the Nismes – Vireux-Molhain area, southern border of the Dinant Synclinorium (Belgium, northern France)

Cited by 2 publications

References 14 publications

Morphological evolution during the last hurrah of the trilobites: morphometric analysis of the Devonian asteropyginid trilobites

Morphological evolution during the last hurrah of the trilobites: morphometric analysis of the Devonian asteropyginid trilobites

Revised stratigraphy of the Eifelian (Middle Devonian) of southern Belgium: sequence stratigraphy, global events, reef development and basin structuration

Contact Info

Product

Resources

About