NOMEN: Gigantostraca Haeckel 1866: XC [E. Haeckel. Generale Morphologie der Organismen. - Berlin, Verlag von Georg Reimer, 1866, Bd.2]
ORIGINAL LISTED MEMBERSHIP (Haeckel
1866): Pterygotiden 
Pterygotus
+ Eurypteriden Eurypterus
JUNIOR
CIRCUMSCRIPTIONAL SYNONYMS:
= Pomatostoma
Thorell
& Lindsrtrom 1885
= Haplochelata Börner 1902
TYPIFIED NAME(S): Eurypterus/fg [f: Eurypteridae Burmeister 1845; g: Eurypterus De Kay 1825, typus E. remipes De Kay 1825]
TYPIFIED NAMES IN USE: Eurypteridae, Eurypteroidea, Eurypterida, Eurypterina, Euryptera
MODERN
STATUS: the valid, the
oldest name of a generally accepted, extinct taxon. 