云南广南早泥盆世坡松冲组鱼类化石新材料
收稿日期: 2025-10-24
网络出版日期: 2026-02-06
基金资助
国家自然科学基金(42362001);国家自然科学基金(92255301)
Early Devonian fish material from Posongchong Formation of Guangnan, Yunnan, China
Xian and Mo, co-first author
Received date: 2025-10-24
Online published: 2026-02-06
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。
鲜祖敏 , 莫雄 , 关奇 , 赵应天 , 薛钦元 , 李强 , 刘军平 , 朱敏 . 云南广南早泥盆世坡松冲组鱼类化石新材料[J]. 古脊椎动物学报, 2026 , 64(2) : 151 -166 . DOI: 10.19615/j.cnki.2096-9899.260206
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.
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