A New Antiarch, Bothriolepis zhujiangyuanensis sp. nov., from the Eifelian (Middle Devonian) of Qujing, Yunnan, SW China

IF 3.5 3区地球科学 Q1 GEOSCIENCES, MULTIDISCIPLINARY Acta Geologica Sinica ‐ English Edition Pub Date : 2025-02-18 DOI:10.1111/1755-6724.15269

Zumin XIAN, Zhaohui PAN, Jianhua WANG, Liantao JIA, Yingtian ZHAO, Yanchao LUO, Min ZHU

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Abstract

A new species of Bothriolepis (Placodermi, Antiarcha), B. zhujiangyuanensis sp. nov., is described from the Eifelian (Middle Devonian) Shangshuanghe Formation at the Pearl River Source Scenic Area, Qujing, Yunnan Province, southwestern China and is characterized by a broad postpineal plate bearing a straight anterior margin, a premedian plate wider than long, and a weakly developed dorsal median ridge of the trunk shield. As the eighth Bothriolepis taxon in China, B. zhujiangyuanensis sp. nov. provides a wealth of morphological data to clarify the intrageneric interrelationships. Maximum parsimony analysis, using a revised data set of the genus with 76 ingroup taxa and 72 characters, yields a well-resolved consensus tree for Bothriolepis. The phylogenetic result shows a sister-group relationship between B. zhujiangyuanensis and B. babichevi from Kazakhstan, corroborating the biogeographic proximity between the South China and Kazakhstania blocks during the Middle Devonian.

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来源期刊

Acta Geologica Sinica ‐ English Edition 地学-地球科学综合

CiteScore

3.00

自引率

12.10%

发文量

3039

审稿时长

6 months

期刊介绍： Acta Geologica Sinica mainly reports the latest and most important achievements in the theoretical and basic research in geological sciences, together with new technologies, in China. Papers published involve various aspects of research concerning geosciences and related disciplines, such as stratigraphy, palaeontology, origin and history of the Earth, structural geology, tectonics, mineralogy, petrology, geochemistry, geophysics, geology of mineral deposits, hydrogeology, engineering geology, environmental geology, regional geology and new theories and technologies of geological exploration.