cirrostomi definition

  • noun-plural:
    • The lowest band of vertebrates; -- so called from the cirri across the lips; the Leptocardia. See amphioxus.
    • The lowest group of vertebrates; -- so called from the cirri round the lips; the Leptocardia. See amphioxus.
  • others:
    • One of the many names placed on the acranial vertebrates (Pharyngobranchia, Leptocardia, or Acrania) represented because of the genus Amphioxus or Branchiostoma, the lancelets: so named through the cirri surrounding the lips.
    • among the numerous names placed on the acranial vertebrates (Pharyngobranchia, Leptocardia, or Acrania) represented because of the genus Amphioxus or Branchiostoma, the lancelets: so-named through the cirri surrounding the mouth.

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