Morphological disparity trends in Devonian trilobites from North Africa

Bault, Valentin; Crônier, Catherine; Monnet, Claude

Document type :

Compte-rendu et recension critique d'ouvrage

DOI :

10.1111/pala.12623

Title :

Morphological disparity trends in Devonian trilobites from North Africa

Author(s) :

Bault, Valentin [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Crônier, Catherine [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Monnet, Claude [Auteur]

Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]

Journal title :

Palaeontology

Pages :

6200304

Publisher :

Wiley

Publication date :

2022

ISSN :

0031-0239

HAL domain(s) :

Planète et Univers [physics]/Sciences de la Terre/Paléontologie

English abstract : [en]

The Devonian was a time of drastic environmental change that shaped the morphology of trilobites. This study aims to investigate their morphological evolution and to show the influence of some abiotic and biotic factors ...
Show more >The Devonian was a time of drastic environmental change that shaped the morphology of trilobites. This study aims to investigate their morphological evolution and to show the influence of some abiotic and biotic factors (bathymetry, feeding habits and visual abilities) on their shape. A dataset was compiled to investigate the shape of three structures (cephalon as a whole, central part of the cephalon, and pygidium) of Devonian trilobites from North Africa, using a geometric morphometric approach. Based on empirical morphospaces, the morphological changes were quantified through the Devonian stages. The results reveal important variations in the morphological disparity of the glabella shape, the facial suture location, the pygidial length and the presence of spines. In the Lochkovian, morphological disparity was low, subsequently increased in the Pragian with numerous innovations, and reached a maximum in the Emsian. If the morphospace occupancy remained until the Eifelian, a severe loss of disparity occurred in the Givetian, a time known for important environmental changes. Disparity then remained low in the Late Devonian. The shapes inherited from the Silurian persisted throughout the Devonian whereas Pragian novelties were most affected by losses. These persistent shapes were more versatile for environmental adaptation, helping those trilobites to survive the environmental events. Similarly, the trilobite orders that survived Devonian events had a wide morphological spectrum and were better adapted to withstand environmental change.Show less >

Language :

Anglais

Popular science :

Non

Collections :

Évolution, Écologie et Paléontologie (Evo Eco Paleo) - UMR 8198

Source :

Harvested from HAL

Files

document
Open access
Access the document

Bault-etal_Manuscrit%20R3.pdf
Open access
Access the document

Figs1-S8.pdf
Open access
Access the document

Tables1-2.pdf
Open access
Access the document

Morphological disparity trends in Devonian ... BibTeX CSV Excel RIS

Files

Morphological disparity trends in Devonian ...

BibTeX

CSV

Excel

RIS