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首页> 外文期刊>Journal of Paleontology >First report of a larval shell repair scar on a lingulate brachiopod: Evidence of durophagous predation in the Cambrian pelagic realm?
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First report of a larval shell repair scar on a lingulate brachiopod: Evidence of durophagous predation in the Cambrian pelagic realm?

机译：舌状腕足上的幼虫壳修复疤痕的首次报道：寒武纪中上层界中食虫性捕食的证据吗？

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摘要

A dorsal valve of an Upper Cambrian lingulate brachiopod exhibits a repair scar on the anterior lateral edge of its larval shell. This species is characterized by an abrupt change in ornamentation from larval to postlarval growth. Shell material secreted in the injured area after the damage occurred exhibits ornamentation that is characteristic of postlarval growth, although equivalent growth exhibits characteristics of the larval stage. A break in the edge of the shell is visible, and the growth lines of the larval and postlarval shell were distorted until the broken area was filled in. Damage to the surface of the shell is interpreted to have been caused by the same event. Modern lingulate brachiopod larvae are planktotrophic and are interpreted to have been so throughout their long geologic history. Therefore, an environmental cause of shell damage seems unlikely and the injuries are interpreted to have been caused by an unknown durophagous predator. This specimen offers evidence that lingulate brachiopod larvae were able to survive shell breakage and repair their shells.
机译：上寒武统的弓形腕足动物的背瓣在其幼虫壳的前侧边缘显示出修复疤痕。该物种的特征是从幼体到幼体生长的装饰突然改变。损伤发生后在受伤区域分泌的壳材料表现出装饰性，这是幼虫后生长的特征，尽管同等的生长表现出幼虫阶段的特征。可以看到外壳边缘出现断裂，幼虫和幼体外壳的生长线变形，直到填充破损区域为止。对外壳表面的损坏被认为是同一事件引起的。现代的舌状腕足类幼虫是浮游性的，并且在整个漫长的地质历史中被解释为是。因此，环境造成外壳损坏的可能性似乎很小，而且这些伤害被认为是由不明硬食肉食肉动物造成的。该标本提供了证明，腕足腕类幼虫能够幸免于壳破裂并修复其壳。

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