Early Devonian fish material from Posongchong Formation of Guangnan, Yunnan, China

doi:10.19615/j.cnki.2096-9899.260206

Vertebrata Palasiatica

Early Devonian fish material from Posongchong Formation of Guangnan, Yunnan, China

XIAN Zu-Min¹ MO Xiong² GUAN Qi² ZHAO Ying-Tian³ XUE Qin-Yuan^4,5 LI Qiang³ LIU Jun-Ping² ZHU Min^4,5*

(1 Yunnan Key Laboratory for Palaeobiology, Institute of Palaeontology, Yunnan University Kunming 650500)
(2 Yunnan Institute of Geological Survey Kunming 650216)
(3 Qujing Normal University Qujing 655000)
(4 Key Laboratory of Vertebrate Evolution and Human Origins, Institute of Vertebrate Paleontology and Paleoanthropology, Chinese Academy of Sciences Beijing 100044)
(5 University of Chinese Academy of Sciences Beijing 100044)
Xian and Mo, co-first author *Corresponding author: zhumin@ivpp.ac.cn

云南广南早泥盆世坡松冲组鱼类化石新材料

鲜祖敏¹ 莫雄² 关奇² 赵应天³ 薛钦元^4,5 李强³ 刘军平² 朱敏^4,5

(1 云南省古生物研究院云南省古生物重点实验室云南昆明 650500)
(2 云南省地质调查院昆明 650216)
(3 曲靖师范学院自然历史文化研究中心云南曲靖 655000)
(4 中国科学院古脊椎动物与古人类研究所，脊椎动物演化与人类起源重点实验室北京 100044)
(5 中国科学院大学北京 100044)

Abstract

Abstract:

New findings of early vertebrates, including placoderms, sarcopterygians, and the galeaspids Sanqiaspis rostrata, Macrothyraspis longicornis, Gantarostraspis gengi, Wenshanaspis sp., are described from Posongchong Formation (Pragian, Lower Devonian) in Zhujie, Guangnan County, Wenshan Prefecture, Yunnan, China. The new specimen of Macrothyraspis longicornis exhibits the ventral side of its headshield, revealing a large branchial chamber encompassed by a very narrow ventral rim. The material of Yunnanolepidoidei and Petalichthyida represents the first fossil record of placoderms from Wenshan Prefecture, southwestern Yunnan. These new findings enrich the fish diversity of the Pragian Xujiachong Vertebrate Assemblage and provide additional paleoichthyological data for the biostratigraphic correlation between Posongchong Formation and its coeval strata in southwestern China and northern Vietnam.

Key words: Guangnan, Wenshan, Yunnan, Posongchong Formation, Early Devonian, Pragian, galeaspids, placoderms

摘要：

记述了云南省文山州广南县珠街镇早泥盆世布拉格期坡松冲组发现的早期脊椎动物新材料，包括盾皮鱼类、肉鳍鱼类以及长吻三岐鱼(Sanqiaspis rostrata)、长角大窗鱼(Macrothyraspis longicornis)、鸭吻鱼(不定种) (Gantarostraspis sp. indet.)、文山鱼(未定种) (Wenshanaspis sp.)等多种盔甲鱼类。长角大窗鱼的新标本展示了其头甲的腹面，呈现出被狭窄腹环包围的口鳃腔。云南鱼目(Yunnanolepidoidei)和瓣甲鱼目(Petalichthyida)的新材料代表了滇西南文山地区盾皮鱼类化石的首次记录。这些新发现丰富了徐家冲脊椎动物群的鱼类多样性，并为坡松冲组与中国西南部和越南北部同期地层之间的生物地层对比提供了更多的古鱼类学资料。

关键词: 云南文山广南, 坡松冲组, 早泥盆世, 布拉格期, 盔甲鱼类, 盾皮鱼类

XIAN Zu-Min, MO Xiong, GUAN Qi, ZHAO Ying-Tian, XUE Qin-Yuan, LI Qiang, LIU Jun-Ping, ZHU Min.in press Early Devonian fish material from Posongchong Formation of Guangnan, Yunnan, China. Vertebrata Palasiatica, DOI: 10.19615/j.cnki.2096-9899.260206.

鲜祖敏, 莫雄, 关奇, 赵应天, 薛钦元, 李强, 刘军平, 朱敏. 0, (): 1-, 云南广南早泥盆世坡松冲组鱼类化石新材料. 古脊椎动物学报, DOI: 10.19615/j.cnki.2096-9899.260206.

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