Lamprey   33-III
VERTEBRATA
Petromyzontiformes
 
 
Sea Lamprey (Petromyzon marinus).
[Public Domain]



Chapter Outline
  1. Description of Vertebrata
  2. Classification of Vertebrata
  3. Petromyzontiformes
  4. Chondrichthyes
  5. Batoidea
  6. Chimaeriformes

Tree



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"Lampreys...are the most primitive extant vertebrates. Definite fossil records date back to the upper Carboniferous, about 280 million years ago. Eel-like, jawless fish with cartilaginous skeleton and notochord. Members of Petromyzontinae have the highest number of chromosomes (164-174) among vertebrates. Distribution: mainly temperate zones of the world." [Fishbase]

There is only one family in the order Petromyzontiformes: Petromyzontidae.

FAMILY PETROMYZONTIDAE

  • Sea Lamprey (Petromyzon marinus) - (Eastern U.S.), NOAH
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