End-Permian mass extinction of calcareous algae and microproblematica from Liangfengya, South China - 15/10/18
Abstract |
A new assemblage of calcareous algae and microproblematica is reported from the Changxing Formation at the Liangfengya section in Chongqing, South China. This assemblage comprises eighteen species of seven genera, including three genera of gymnocodiaceaens (Gymnocodium, Permocalculus, and Tauridium), three genera of dasycladaleans (Epimastopora, Macroporella, and Mizzia), and one genus of microproblematica (Pseudovermiporella). A new algal species, Tauridium elongatum nov. sp., is described. Quantitative analysis indicates that the last occurrences of 22% of the species (4 out of 18) fall into a 52cm thick interval of the uppermost Changhsingian. No calcareous algae are found in the Permian-Triassic boundary (P-T boundary) beds and the overlying Feixianguan Formation. Four out of 10 species have a stratigraphic abundance greater than 10% and all vanished in the uppermost Changhsingian. An abrupt extinction for calcareous algae occurred in the Clarkina yini conodont Zone.
Le texte complet de cet article est disponible en PDF.Keywords : Chlorophyceae, Tubiphytidae, Mass extinction, Changhsingian, Uppermost Permian, Liangfengya, South China
Plan
| ☆ | Corresponding editor: Gilles Escarguel. |
Vol 51 - N° 5
P. 401-418 - octobre 2018 Retour au numéro
Article précédent
- Brachypotherium (Perissodactyla, Rhinocerotidae) from the late Miocene of Samburu Hills, Kenya
- Naoto Handa, Masato Nakatsukasa, Yutaka Kunimatsu, Hideo Nakaya
- Belowground rhizomes and roots in waterlogged paleosols: Examples from the Middle Jurassic of Beijing, China
- Lu Liu, Min Qin, Ning Tian, Changfu Zhou, Deming Wang, James F. Basinger, Jinzhuang Xue
Bienvenue sur EM-consulte, la référence des professionnels de santé.
L’accès au texte intégral de cet article nécessite un abonnement.
Déjà abonné à cette revue ?