Linked from

The 6 pages that link to Early vertebrate, each with the reason it gives.

• OperculumRelated: Early vertebrates show how gill protection preceded the widespread bony operculum.

• CephalaspisRelated: Cephalaspis documents vertebrate diversity before jawed fishes became dominant.

• ThelodontiRelated: Thelodonts contribute evidence about vertebrate diversity before and during the rise of jaws.