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词汇 diapsid
释义

Definition of diapsid in English:

diapsid

noun dʌɪˈapsɪddīˈapsəd
Zoology
  • A reptile of a large group characterized by the presence of two temporal openings in the skull, including the lizards, snakes, crocodiles, dinosaurs, and pterosaurs.

    〔动〕无孔类爬行动物

    Sometimes placed in a subclass Diapsida

    Example sentencesExamples
    • It would not be safe to assume that the synapsid temporal fenestra is strictly homologous to the lower temporal fenestra of diapsids.
    • As with many in the systematics community, I am skeptical that turtles are derived diapsids.
    • Adding to the controversy, several independent molecular analyses also regard turtles as diapsids.
    • The primitive reptiles were represented by lizard-like captorhinids and basal diapsids.
    • You may also have noticed that the birds do not have their own box in the cladogram; this is because they are one subgroup of the diapsids, a clade which includes dinosaurs, snakes, and most reptiles.

Origin

Early 20th century: from modern Latin Diapsida, from di-1 'two' + Greek apsis, apsid- 'arch'.

Definition of diapsid in US English:

diapsid

noundīˈapsəd
Zoology
  • A reptile of a large group characterized by the presence of two temporal openings in the skull, including the lizards, snakes, crocodiles, dinosaurs, and pterosaurs.

    〔动〕无孔类爬行动物

    Subclass Anapsida

    Example sentencesExamples
    • The primitive reptiles were represented by lizard-like captorhinids and basal diapsids.
    • As with many in the systematics community, I am skeptical that turtles are derived diapsids.
    • It would not be safe to assume that the synapsid temporal fenestra is strictly homologous to the lower temporal fenestra of diapsids.
    • You may also have noticed that the birds do not have their own box in the cladogram; this is because they are one subgroup of the diapsids, a clade which includes dinosaurs, snakes, and most reptiles.
    • Adding to the controversy, several independent molecular analyses also regard turtles as diapsids.

Origin

Early 20th century: from modern Latin Diapsida, from di- ‘two’ + Greek apsis, apsid- ‘arch’.

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