Cephalaspidomorphi

== Translingual == === Etymology === New Latin, from Ancient Greek κεφαλή (kephalḗ, “head”) + stem of ἀσπίς (aspís, “shield”) +‎ -morphi === Proper noun === †Cephalaspidomorphi A taxonomic class within the subphylum Vertebrata – jawless fish, all of which are extinct in most current classifications. ==== Usage notes ==== In much of the 20th century this class included lampreys (Petromyzontidae). ==== Hypernyms ==== (class): Eukaryota – superkingdom; Animalia – kingdom; Bilateria – subkingdom; Deuterostomia – infrakingdom; Chordata – phylum; Chordata Craniata - clade; Vertebrata - subphylum; Hyperoartia - clade ==== Hyponyms ==== (class): †Atelaspidiformes, †Birkeniiformes, †Cephalaspidiformes, †Galeaspidiformes, †Pituriaspidiformes, †Tremataspidiformes - orders === See also === †Anaspida †Galeaspida †Osteostraci †Pituriaspida === References === Ruggiero MA, Gordon DP, Orrell TM, Bailly N, Bourgoin T, Brusca RC, et al. (2015) A Higher Level Classification of All Living Organisms. PLoS ONE 10(4): e0119248. PMID 25923521, →DOI