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EntityQ4403103· pop 5· linked from 5 articles

狹窄海星

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Stenaster is an extinct genus of brittle stars that lived from the Ordovician to the Silurian.

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Stenaster salteri - National Museum of Nature and Science, Tokyo - DSC07718.JPG
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taxon name
Stenaster
taxon rank
genus
Commons category
Stenaster
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Article · 中文

狹窄海星(學名:Stenaster),又名窄海星,是一屬已滅絕的海星,其化石主要分布在歐洲。本屬和其他海星的親緣關係還不大為人知,其小而怪異的結構使其被劃入不同的分類群如海星綱和蛇尾綱等。牠們的五條腕短小,圓盤很寬闊。寬闊的步帶小骨延伸穿過腕。

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