Genus

Praetrilogania Blom, 1999

Luokittelu
Organism groupBiota
KingdomAnimalia
PhylumChordata
SubphylumVertebrata
SuperclassAgnatha
ClassPteraspidomorphi
SubclassThelodonti
OrderShieliiformes
FamilyShieliidae
GenusNethertonodus
Paralogania
Praetrilogania
Shielia
Valiukia