定义 中文名称: 羽枝 英文名称: pinnule 定义: 由腕板侧方长出的羽状枝骨,活体海百合为食物沟所在位置。 应用学科: 古生物学(一级学科); 古无脊椎动物学(二级学科); 棘皮动物门(二级学科)
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但这件标本没有羽轴,带状尾巴上只有羽枝和小羽枝。
But this specimen lacked the rachis; it just had barbs and barbules down its ribbonlike tail.
该发现表明,羽毛中的羽枝和小羽枝是先于羽轴进化出来的。
The finding suggests that the barbs and barbules evolved before the rachis in feathers.
沿着羽轴伸展开去的较小的杆状物叫做羽枝,沿着羽枝伸展开去的更小的细丝则叫小羽枝。
Branching from the rachis are smaller shafts called barbs, and then branching from the barbs are even smaller filaments called barbules.
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