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单词 pereiopod
释义

Definition of pereiopod in English:

pereiopod

noun pəˈrʌɪəpɒdpəˈriːəpɒdpəˈrīəˌpäd
Zoology
  • Each of the eight walking limbs of a crustacean such as a crab or lobster, growing from the thorax.

    〔动〕(甲壳动物的)步足,胸足

    Example sentencesExamples
    • The specimen bears three chelate pereiopods, with the first much larger than the others.
    • As with many of the modem Eucopia species, this fossil taxon is characterized by the possession of highly elongate posterior pereiopods.
    • Members of the Hexapodidae are easily identified if sterna and pereiopods are present, because possession of four pairs of pereiopods and seven exposed sternites is diagnostic for the family.
    • At least one family within the Dorippoidea, the Dorippidae, has very long second and third pereiopods and short first pereiopods, as do necrocarcinids with preserved appendages.
    • It possesses several features that place it in the Lophogastrida, such as the presence of well-developed abdominal pleurae, pleopods and pereiopods, a broadly structured telson and a lack of uropodal statocysts.

Origin

Late 19th century: from Greek peraioōn 'transporting' (present participle of peraioun) + pous, pod- 'foot'.

Definition of pereiopod in US English:

pereiopod

nounpəˈrīəˌpäd
Zoology
  • Each of the eight walking limbs of a crustacean such as a crab or lobster, growing from the thorax.

    〔动〕(甲壳动物的)步足,胸足

    Example sentencesExamples
    • As with many of the modem Eucopia species, this fossil taxon is characterized by the possession of highly elongate posterior pereiopods.
    • It possesses several features that place it in the Lophogastrida, such as the presence of well-developed abdominal pleurae, pleopods and pereiopods, a broadly structured telson and a lack of uropodal statocysts.
    • Members of the Hexapodidae are easily identified if sterna and pereiopods are present, because possession of four pairs of pereiopods and seven exposed sternites is diagnostic for the family.
    • At least one family within the Dorippoidea, the Dorippidae, has very long second and third pereiopods and short first pereiopods, as do necrocarcinids with preserved appendages.
    • The specimen bears three chelate pereiopods, with the first much larger than the others.

Origin

Late 19th century: from Greek peraioōn ‘transporting’ (present participle of peraioun) + pous, pod- ‘foot’.

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更新时间:2024/11/8 22:23:12