Archistia
plural noun
Ar·chis·tia
ärˈkistēə
: an order of primitive Paleozoic ganoid fishes of moderate size superficially resembling modern herrings but having heterocercal tails, the maxilla expanded over the cheek, and a true clavicle in the pectoral girdle
Word History
Etymology
New Latin, from archi- + -istia (as in Cladistia)