| It can have at once, the concentration of a craniate animal and the diffused vitality of an amoeba. |
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| After the publication of the first computer-generated phylogenies of the major craniate groups, the discussion has become quite difficult. |
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| How can changes in an ancestral ontogeny be reconstructed, since the ancestors of most craniate radiations are extinct? |
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| The recent discovery of the Cambrian craniate Haikouichthys has confused matters somewhat. |
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| The relationships between hagfishes, lampreys, and jawed vertebrates are one of the still-unresolved problems in craniate phylogeny. |
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| The group is of great evolutionary interest, however, because it includes the oldest known craniate fossils and because the living agnathans have many primitive characteristics. |
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