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Lamprey - Open Encyclopedia (Site not responding. Last check: 2007-10-29) |
 | | The lampreys comprise an entire class Cephalaspidomorphi, containing a single order Petromyzontiformes and family Petromyzontidae. |
| | Cephalaspidomorpha is sometimes given as a subclass of the Cephalaspidomorphi. |
| | Petromyzoniformes and Petromyzonidae are sometimes used as alternative spellings for Petromyzontiformes and Petromyzontidae respectively. |
| open-encyclopedia.com /Lamprey (564 words) |
