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词汇 anapsid
释义

Definition of anapsid in English:

anapsid

nounəˈnapsɪdəˈnapsəd
Zoology
  • A reptile of a group characterized by a lack of temporal openings in the skull, including the turtles and their relatives and many early fossil forms.

    〔动〕无孔型

    Sometimes placed in a subclass Anapsida, though this taxon is now often not recognized

    Example sentencesExamples
    • All members of the group called the Reptilia, except for the anapsids (turtles and their ilk), and a few extinct groups, are diapsids.
    • The relationships of more basal anapsids are not firmly established, but millerettids apparently appeared first.
    • Today, only one group of anapsids remains (Chelonia - the turtles), which truly could be called an evolutionary success story.
    • If anything, the synapsids seem more closely related to anapsids than diapsids.
    • Therefore, a long hiatus exists in the fossil record of anapsids.

Origin

1930s: from modern Latin Anapsida, from Greek an- 'without' + apsis, apsid- 'arch'.

Definition of anapsid in US English:

anapsid

nounəˈnapsəd
Zoology
  • A reptile of a group characterized by the lack of temporal openings in the skull, including the turtles and their relatives.

    〔动〕无孔型

    Sometimes placed in a subclass Anapsida, though this taxon is now often not recognized

    Example sentencesExamples
    • Therefore, a long hiatus exists in the fossil record of anapsids.
    • The relationships of more basal anapsids are not firmly established, but millerettids apparently appeared first.
    • Today, only one group of anapsids remains (Chelonia - the turtles), which truly could be called an evolutionary success story.
    • All members of the group called the Reptilia, except for the anapsids (turtles and their ilk), and a few extinct groups, are diapsids.
    • If anything, the synapsids seem more closely related to anapsids than diapsids.

Origin

1930s: from modern Latin Anapsida, from Greek an- ‘without’ + apsis, apsid- ‘arch’.

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