File:Bothriolepis_panderi.jpg · Wikimedia Commons · See Wikimedia Commons
Placodermi
Sign in to saveAlso known as Placoderm
Placoderms (from Ancient Greek πλάξ [plax, plakos] 'plate' and δέρμα [derma] 'skin') are vertebrate animals of the class Placodermi, an extinct group of prehistoric fish known from Paleozoic fossils during the Silurian and the Devonian periods. While their endoskeletons are mainly cartilaginous, their head and thorax were covered by articulated armoured plates (hence the name), and the rest of the body was scaled or naked depending on the species.
Placoderms were an extinct group of prehistoric fish that lived during the Silurian and Devonian periods, distinguished by their distinctive armor-plated heads and thoraxes covering mostly cartilaginous skeletons. They matter to our understanding of vertebrate evolution because they represent an early branch of fish that developed protective plating, a significant innovation in how ancient animals adapted to their environments.
AI-generated from the Wikipedia summary — may contain errors.
Wikidata facts
- Image
- DunkleosteusSannoble.JPG
Show 5 more facts
- Commons category
- Gnathostomata
- taxon common name
- Zırhlı balıklar
- taxon name
- Placodermi
- start time
- 430000000-
- end time
- 358900000-
Sources (1)
via Wikidata · CC0
Article · Italiano
I Placodermi sono una classe completamente estinta di vertebrati simili ai pesci moderni. I Placodermi sono noti tra il Siluriano superiore ed il Devoniano superiore. Tra i placodermi ci sono animali di grandi dimensioni come Dunkleosteus appartenenti all'ordine degli artrodiri, che erano probabilmente grossi predatori dallo stile di vita simile a quello dei moderni squali. Secondo uno studio australiano sono stati i primi esseri viventi a compiere un atto sessuale con genitali.
Abstract from DBpedia / Wikipedia · CC BY-SA