प्लाकोडर्म इसके अंग्रेजी अर्थ का उदाहरण

Displays include skeletons of Edmontosaurus, Maiasaura, Diplodocus, Gargoyleosaurus, Allosaurus, Stegosaurus, Othnielia and Coelophysis, a sea lily reef diorama from 435 million years ago, a cast/replica skull of the ancient placoderm fish, Dunkleosteus, and a collection of trilobites.

Associated vertebrates found in the same deposits include an armored jawless fish (Psammolepis), two placoderms (Asterolepis and Plourdosteus), an unidentified acanthodid acanthodian, a porolepiform lobe-fin (Laccognathus), a lungfish (Dipterus), and another elpistostegalian (Livoniana).

History of aviation Ctenurella ("Little Comb Tail") is an extinct genus of ptyctodont placoderm from the Late Devonian of Germany.

It was also relatively small for a placoderm, at just in length.

Ptyctodontid placoderms recently have been shown to give birth to live young, with specimens of pregnant females from two genera, Materpiscis and Austroptyctodus, both from the Gogo Formation of Western Australia, showing the presence of unborn embryos within the mother fishes (Long et al.

Arthrodire placoderms are notable for the movable joint between armor surrounding their heads and bodies.

Like all placoderms, they lacked distinct teeth; instead, they used the sharpened edges of a bony plate on their jawbone as a biting surface.

A common misconception is the arthrodires (along with all other placoderms) were sluggish bottom-dwellers that were outcompeted by more advanced fish.