Definify.com
Webster 1913 Edition
Placodermi
‖
Placˊo-der′mi
,Noun.
pl.
[NL., fr. Gr.
πλάξ
, πλακός
, a tablet + δέρμα
skin.] (Paleon.)
An extinct group of fishes, supposed to be ganoids. The body and head were covered with large bony plates. See Illust. under
Pterichthys
, and Coccosteus
. Definition 2024
Placodermi
Placodermi
Translingual
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