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Ammonoid age control of the Early Triassic marine reptiles from Chaohu (South China)


Ji, Cheng; Zhang, Chao; Jiang, Da-yong; Bucher, Hugo; Motani, Ryosuke; Tintori, Andrea (2015). Ammonoid age control of the Early Triassic marine reptiles from Chaohu (South China). Palaeoworld, 24(3):277-282.

Abstract

Here we described a series of ammonoid specimens from the Early Triassic of Chaohu, South China and recognized the occurrence of Procolumbites for the first time in this area. The Procolumbites layer is about one meter above the first appearance of Chaohusaurus, indicating that the oldest Chaohusaurus is within the Procolumbites Zone of middle Spathian age. This new age constrain is significantly older than the previously suggested Subcolumbites Zone assignment (early late Spathian). To date, Chaohusaurus is the oldest known ichthyopterygian.

Abstract

Here we described a series of ammonoid specimens from the Early Triassic of Chaohu, South China and recognized the occurrence of Procolumbites for the first time in this area. The Procolumbites layer is about one meter above the first appearance of Chaohusaurus, indicating that the oldest Chaohusaurus is within the Procolumbites Zone of middle Spathian age. This new age constrain is significantly older than the previously suggested Subcolumbites Zone assignment (early late Spathian). To date, Chaohusaurus is the oldest known ichthyopterygian.

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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Paleontological Institute and Museum
Dewey Decimal Classification:560 Fossils & prehistoric life
Uncontrolled Keywords:Ammonoid; Early Triassic; Marine reptiles; Chaohu
Language:English
Date:2015
Deposited On:26 Feb 2015 07:22
Last Modified:08 Dec 2017 12:19
Publisher:Elsevier
ISSN:1871-174X
Publisher DOI:https://doi.org/10.1016/j.palwor.2014.11.009

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