Definition of PLACODERM. Meaning of PLACODERM. Synonyms of PLACODERM

Here you will find one or more explanations in English for the word PLACODERM. Also in the bottom left of the page several parts of wikipedia pages related to the word PLACODERM and, of course, PLACODERM synonyms and on the right images related to the word PLACODERM.

Definition of PLACODERM

Placoderm
Placoderm Plac"o*derm, n. [Gr. ?, ?, tablet + ? skin.] (Paleon.) One of the Placodermi.

Meaning of PLACODERM from wikipedia

- Placoderms (from Ancient Gr**** πλάξ (plax, plakos) 'plate' and δέρμα (derma) 'skin') are vertebrate animals of the class Placodermi, an extinct group of...
- Dunkleosteus consists of ten species, some of which are among the largest placoderms ("plate-skinned") to have ever lived: D. terrelli, D. belgicus, D. denisoni...
- lepis 'scale') was a widespread, abundant and diverse genus of antiarch placoderms that lived during the Middle to Late Devonian period of the Paleozoic...
- and cartilaginous fishes, as well as extinct prehistoric fish such as placoderms and acanthodians. Most gnathostomes have retained ancestral traits like...
- record from the Silurian by two groups of fish: the armoured fish known as placoderms, which evolved from the ostracoderms; and the Acanthodii (or spiny sharks)...
- during the Silurian was the diversification of jawed fish, which include placoderms, acanthodians (which gave rise to cartilaginous fish) and osteichthyan...
- including all living cartilaginous and bony fish, as well as the extinct placoderms and acanthodians. In a break to the long tradition of grouping all fish...
- connection between the teeth and the original dermal scales. The old placoderms did not have teeth at all, but had sharp bony plates in their mouth. Thus...
- class Placodermi. Recent studies indicate that Osteichthyes evolved from placoderms like Entelognathus, while acanthodians are more closely related to modern...
- presented in 2024 is a list of new fossil taxa of jawless vertebrates, placoderms, cartilaginous fishes, bony fishes, and other fishes that were described...