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exocycloida

/ˌɛk.soʊ.saɪˈklɔɪ.də/

翻译: 指海胆纲下的一个分类类群,即环海胆目(Exocycloida),为扁平海胆,身体呈扁平形态。

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noun

/ˌɛk.soʊ.saɪˈklɔɪ.də/C2formalscientific
  • zh指海胆纲下的一个分类类群,即环海胆目(Exocycloida),为扁平海胆,身体呈扁平形态。

A scientific term referring to a taxonomic group of flat sea urchins, characterized by their flattened body shape.

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  1. Taxonomic group of sea urchinsC2formalscientific

    A taxonomic order or suborder of flat sea urchins, characterized by their flattened bodies and often found in sandy or muddy ocean floors.

    zh海胆分类群

    • Fossils of Exocycloida are commonly found in Cretaceous marine deposits.
    • The Exocycloida order includes species with distinct petaloid ambulacra.
    • Marine biologists classify these flat sea urchins under Exocycloida.