Discriminating conodont recording bias: a case study from the Nanzhang-Yuan’an Lagerstätte

Author:

Wu Kui123,Yang Boyong1,Zhao Bi1,Yang Liangzhe1,Zou Yarui1,Chen Gang1,Li Jiangli1

Affiliation:

1. Hubei Institute of Geosciences, Hubei Geological Bureau, Wuhan, Hubei, China

2. State Key Laboratory of Biogeology and Environmental Geology, School of Earth Science, China University of Geosciences (Wuhan), Wuhan, Hubei, China

3. Hubei Key Laboratory of Resource and Ecological Environment Geology, Wuhan, Hubei, China

Abstract

The Early Triassic Nanzhang-Yuan’an Lagerstätte of Hubei Province, South China, preserves abundant marine reptiles in the uppermost part of the Jialingjiang Formation and provides detailed insights into marine organisms, including newly discovered and well preserved conodont clusters of the Family Ellisonidae. These conodont elements allow us to assess the bias introduced during the acquisition process. We examined conodont elements preserved on the bedding planes and those acquired after the acid-dissolving method to analyze their attributes and length distributions. We identified a biased preservation of different conodont elements related to their morphologies. After the acid-dissolving procedures, the bias increased, and all different elements were affected, with larger individuals being particularly prone to destruction. Among them, the P elements of Ellisonidae were the least affected, while the S elements were the most affected. This study further indicates that paleobiological interpretations based on fossil size or morphology could be obscured if the influence of post-mortem effect is ignored.

Funder

National Natural Science Foundation of China

Hubei Provincial Natural Science Foundation

Science and Technology Special Fund of Hubei Geological Bureau

Publisher

PeerJ

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