Translingual

Proper noun

†Placodermi

1. 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