Devonian is the age of fish. What kinds of fish are there?

Devonian is sometimes called "Fish Age". Skeletal fish evolved in the late Silurian or early Devonian, so in the early Devonian, most fish had armor-like bone plates, and jawless fish was also a common fish species at that time.

In addition to the dungeon described in the video, there are many representative fish. By the end of Devonian, fish had been divided into classes and subclasses-jawless fish, cartilaginous fish, radial fin fish, leaf fin fish and bony fish, which flourished in the middle of Devonian. In addition, two kinds of fish appeared in the late Ordovician, and the Silurian tended to be diversified and the Devonian flourished. In fact, shield fish is one of them, and it is also the most important fish in Devonian. At the end of devonian period, the species and quantity of shield fish replaced the jawless fish. The other is echinoderms, which also flourished in Devonian. It has jaws and bones, but it also has some characteristics of cartilaginous fish. However, the shield fish died out at the end of Devonian, and echinoderms also declined until the Permian extinction.

Belongs to the shield fish, Ge Mingdeng sickle turtle? Drepanaspis gemuendenensis is a jawless fish, which appeared in the early Devonian.

Bothriolepis genus? The head, trunk and pectoral fin are covered with bone nails composed of multiple nail plates, and the nail plates of the trunk are particularly developed.

An ancient shark belonging to cartilaginous fish. Archaeopteryx arcuatus, with long spines protruding from the back of the skull and long tail fins like eels;

Hamberger heterosexual shark? Xenacanthus humbergensis, named for its banded dorsal fin and unique spine;

Patterson shark, a Patterson shark? Mandibular joints are weaker than sharks today, but they have stronger mandibular muscles.

It belongs to jawless fish, Pteraspis? Rosetta? It was abundant in the Late Silurian and devonian period, and it was the most typical family of Orionidae.

Doria spies Nata Hosty, doria spies Nata Hosty? The lateral edges of gill plate and false nose are serrated.

Belong to bony fish, sawtooth diploid lungfish? Sawfish;

American shortlung fish? Scaumenacia curta？ .

Devonian is the fourth of six Paleozoic periods, between Silurian and Carboniferous. Devonian started 4./kloc-0. 92 billion years ago and lasted until 359 million years ago. Devonian can be divided into Devonian, Middle Devonian and Late Devonian according to geological age.