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单词 Nematoda
释义

Nematoda

/ˌnɛməˈtəʊdə /
plural noun Zoology
A large phylum of worms with slender, unsegmented, cylindrical bodies, including the roundworms, threadworms, and eelworms. They are found abundantly in soil and water, and many are parasites.Other ecdysozoan phyla include Nematoda, Tardigrada, and Onychophora; this classification thus removes onychophorans from the Arthropoda and makes them an outgroup....
  • For example, both the Nematoda and Platyhelminthes contain obligate parasites as well as free-living species.
  • The hexagonal arrangement in both adults and larvae of the internal armature in the buccal apparatus may be plesiomorphic, a shared character with Nematoda and Nematomorpha (Nematoida, subgroup of Cycloneuralia).

Origin

Modern Latin (plural), from Greek nēma, nēmat- 'thread'.

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更新时间:2025/2/23 1:21:23