brachiolaria

zoology

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In echinoderm: Development
…of development is called a brachiolaria, which has three additional arms used for attaching the larva to the seafloor. Echinoids and ophiuroids have complex advanced larvae closely similar in type. The larva, named pluteus, resembles an artist’s easel turned upside down. It has fragile arms formed by lobes of ciliated…
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