Journal
PALAEOWORLD
Volume 24, Issue 3, Pages 277-282Publisher
ELSEVIER
DOI: 10.1016/j.palwor.2014.11.009
Keywords
Ammonoid; Early Triassic; Marine reptiles; Chaohu
Categories
Funding
- National Natural Science Foundation of China [41372016, 41402014]
- State Key Laboratory of Palaeobiology and Stratigraphy (Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences) [123102]
- Research Fund for the Doctoral Program of Higher Education [20120001110072]
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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. (C) 2014 Elsevier B.V. and Nanjing Institute of Geology and Palaeontology, CAS. All rights reserved.
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