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单词 Gnathostomulida
释义

Definition of Gnathostomulida in English:

Gnathostomulida

plural noun ˌneɪθə(ʊ)stəʊˈmjʊːlidənəˌTHästəˈmyo͞olədə
Zoology
  • A minor phylum of minute marine worms which appear to be intermediate between coelenterates and flatworms.

    〔动〕颚咽动物门

    Example sentencesExamples
    • The lower metazoan groups Gastrotricha and Gnathostomulida, but also Onychophora, Annelida, Mollusca, and Enteropneusta would be the most relevant taxa.
    • This is strikingly illustrated if we just consider character choice in two subsequent publications by the same research group, for example, for placing the ‘acoelomate’ worms, Platyhelminthes, Nemertea, and Gnathostomulida.
    • This structure was first described by Rieger and Tyler in the jaws of Gnathostomulida and Rotifers.
    • Two others are probably too specialized and may turn out to be protostomes (and ecdysozoans in particular): the Chaetognatha and Gnathostomulida.
    • Also unresolved are the phylogenetic positions of Cycloneuralia, Chaetognatha, Gnathostomulida, Cycliophora, and Micrognathozoa.

Derivatives

  • gnathostomulid

  • noun & adjective ˌneɪθə(ʊ)ˈstəʊmjʊlɪd
    Zoology
    • The eggs leave the body by bursting out through the adults body wall, healing of the adult is quick and there is no larval stage, the egg hatching directly into a small but adult gnathostomulid.
      Example sentencesExamples
      • How many are familiar with the more obscure groups such as gnathostomulids, kinorhynchs, priapulids and cycliophorans?
      • Each gnathostomulid is simultaneously hermaphrodite, possessing an ovary and a testis.
      • Perversely, they failed to include any sequences from rotifers, gnathostomulids, chaetognaths, or, in fact, anything that might actually be comparable to Acanthocephala.
      • The gnathostomulid body can be divided into a head and a trunk, and in some cases a small offset tail.

Origin

Modern Latin (plural), from Greek gnathos 'jaw' + stoma 'mouth'.

Definition of Gnathostomulida in US English:

Gnathostomulida

plural nounnəˌTHästəˈmyo͞olədə
Zoology
  • A minor phylum of minute marine worms which appear to be intermediate between coelenterates and flatworms.

    〔动〕颚咽动物门

    Example sentencesExamples
    • Also unresolved are the phylogenetic positions of Cycloneuralia, Chaetognatha, Gnathostomulida, Cycliophora, and Micrognathozoa.
    • Two others are probably too specialized and may turn out to be protostomes (and ecdysozoans in particular): the Chaetognatha and Gnathostomulida.
    • This is strikingly illustrated if we just consider character choice in two subsequent publications by the same research group, for example, for placing the ‘acoelomate’ worms, Platyhelminthes, Nemertea, and Gnathostomulida.
    • This structure was first described by Rieger and Tyler in the jaws of Gnathostomulida and Rotifers.
    • The lower metazoan groups Gastrotricha and Gnathostomulida, but also Onychophora, Annelida, Mollusca, and Enteropneusta would be the most relevant taxa.

Origin

Modern Latin (plural), from Greek gnathos ‘jaw’ + stoma ‘mouth’.

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更新时间:2024/12/27 17:09:42