Definition that contains ampre
- suborder myxinoidei hagfishes as distinguished from lampreys
- myxinoidei hagfishes as distinguished from lampreys
- cyclostomata primitive jawless aquatic vertebrate: lampreys; hagfishes
- suborder hyperoartia lampreys as distinguished from hagfishes
- petromyzoniformes lampreys as distinguished from hagfishes
- hyperotreta hagfishes as distinguished from lampreys
- suborder petromyzoniformes lampreys as distinguished from hagfishes
- order cyclostomata primitive jawless aquatic vertebrate: lampreys; hagfishes
- family petromyzontidae lampreys
- suborder hyperotreta hagfishes as distinguished from lampreys