s/n1475232

Information
has gloss	(noun) extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian heterostracan
lexicalization	eng: heterostracan
subclass of	(noun) eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms jawless fish, jawless vertebrate, agnathan

Links
member of	(noun) extinct group of armored jawless fishes or fish-like vertebrate; taxonomy is not clear suborder Heterostraci, Heterostraci