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单词 ganoid scale
释义
ganoid scale

Biology
  • See scales.


Geology and Earth Sciences
  • Type of fish scale with a rhomboid shape, found in some fossil as well as extant bony fish (e.g. Polypterus and Lepisosteus). The scale consists of a superficial layer of enamel-like ganoine, a middle layer of dentine, and a basal layer of vascular bony tissue.

    ganoid scale

    Ganoid scale


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