A new nektaspid euarthropod from the Lower Ordovician strata of Morocco
Détails
Télécharger: Perez Peris et al. 2020 Nektaspid Fezouata postprint.pdf (3762.68 [Ko])
Etat: Public
Version: Author's accepted manuscript
Licence: Non spécifiée
Etat: Public
Version: Author's accepted manuscript
Licence: Non spécifiée
ID Serval
serval:BIB_CFB1EE69A85F
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
A new nektaspid euarthropod from the Lower Ordovician strata of Morocco
Périodique
Geological Magazine
ISSN
0016-7568
ISSN-L
1469-5081
Statut éditorial
Publié
Date de publication
03/2021
Peer-reviewed
Oui
Volume
158
Numéro
3
Pages
509 - 517
Langue
anglais
Résumé
Nektaspids are Palaeozoic non-biomineralized euarthropods that were at the peak of their diversity during the Cambrian Period. Post-Cambrian nektaspids are a low-diversity group with only a few species described so far. Here we describe Tariccoia tazagurtensis, a new species of small-bodied nektaspid from the Lower Ordovician Fezouata Shale of Morocco. The new species differs from the type (and only other known) species from the Ordovician strata of Sardinia (Italy), Tariccoia arrusensis, in possessing more pointed genal angles, a cephalon with marginal rim, a pygidium with anterior margin curved forwards, a rounded posterior margin, and longer and more curved thoracic tergites. The two specimens of T. tazagurtensis sp. nov. show remains of digestive glands that are comparable to those seen in the Cambrian nektaspid Naraoia. The rare occurrence of T. tazagurtensis sp. nov. in the Fezouata Shale and the distribution of other liwiids suggest that these liwiids were originally minor members of open-marine communities during the Cambrian Period, and migrated into colder brackish or restricted seas during the Ordovician Period.
Mots-clé
Palaeontology, Tariccoia, Nektaspida, Euarthropoda, Ordovician, Morocco, Fezouata Shale
Site de l'éditeur
Création de la notice
19/01/2021 21:27
Dernière modification de la notice
07/06/2024 5:58