Source / 来源: 讲解手册/证据之链 志留纪泥盆纪 鱼形柜 手册.pdf
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Material / 材料类型: scientific_label
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来源转录；保留原展签措辞。OCR可能包含识别误差，请核对PDF或图像。

奇迹秀山鱼
分类：脊椎动物 有颌类 盾皮鱼类
年代：志留纪早期（约4.36亿年前）
地层：兰多维列统特列奇阶迴星哨组
产地：重庆秀山
最早完整保存有颌脊椎动物
目前已知最早的完整保存的有颌鱼类，全长约3厘
米，属于盾皮鱼类，生活在距今约4.36亿年的重庆地
区浅海或河口中。奇迹秀山鱼的身体前半部分由
骨板包裹着，胸鳍前方有发达的棘刺，尾巴强有力
，显示它虽然仍为底栖，但已经有较强的游泳能力。
奇迹秀山鱼为研究颌的起源和早期演化提供了确
切证据，是近些年来最重要的古生物学发现之一
Xiushanosteus mirabilis
Classification: Vertebrata Gnathostomata Placodermi
Age: Early Silurian, ca. 436 million years ago
Formation: Huixingshao Formation, Telychian Stage, Llandovery Series
Locality: Xiushan, Chongqing, China
The Earliest Completely Preserved Jawed Vertebrate
Xiushanosteus mirabilis is the earliest known jawed fish preserved as
a complete body. This placoderm was about 3cm long and lived in
shallow-marine or estuarine environments in the Chongqing region
around 436 million years ago. The front half of its body was covered
with dermal bones, with prominent spines in front of the pectoral fins
and a powerful tail. These features suggest that, although it was
probably bottom-associated, it was already a capable swimmer.
Xiushanosteus provides direct evidence for the origin and early
evolution of jaws and represents a major recent discovery in
vertebrate paleontology.
PLSX*