(vertebrate zoology) The lampreys, an order of eellike, jawless vertebrates (Agnatha) distinguished by a single, dorsal nasal opening, and the mouth surrounded by an oral disk and provided with a rasping tongue.
Petromyzonida
| Sci-Tech Dictionary: Petromyzonida |
(′pe·trō·mī′zän·ə·də)
| 5min Related Video: Petromyzonida |
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 | Petromyzontiformes (vertebrate zoology) |
| lamprey (vertebrate zoology) |
| Cephalaspidomorpha (chordata) |
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Mentioned in
- Petromyzontiformes (vertebrate zoology)
- lamprey (vertebrate zoology)
- Cephalaspidomorpha (chordata)
- Anaspida (fossil fishes)
