Placodermi

== Translingual == === Etymology === New Latin, from Ancient Greek stem of πλάξ (pláx, “something broad or flat”) + δέρμα (dérma, “skin”). === Proper noun === †Placodermi A taxonomic class within the infraphylum Gnathostomata – placoderms, extinct armored fish that lived from the Silurian to the Devonian periods. ==== Usage notes ==== A paraphyletic group, likely to remain useful for fossils. ==== Hypernyms ==== (class): Eukaryota – superkingdom; Animalia – kingdom; Bilateria – subkingdom; Deuterostomia – infrakingdom; Chordata – phylum; Vertebrata - subphylum; Gnathostomata - infraphylum ==== Hyponyms ==== (class): †Antiarchi, †Arthrodira, †Brindabellaspida, †Petalichthyida, †Phyllolepida, †Ptyctodontida, †Rhenanida, †Acanthothoraci, †Pseudopetalichthyida, †Stensioellida - orders === References === Placodermi on Wikipedia.Wikipedia Placodermi on Wikispecies.Wikispecies Category:Placodermi on Wikimedia Commons.Wikimedia Commons “Placodermi”, in Paleobiology Database, 2026