Family

Trinucleidae Hawle et Corda, 1847

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Klassificering
Organism groupBiota
KingdomAnimalia
PhylumArthropoda
SubphylumTrilobita
OrderAsaphida
SuperfamilyTrinucleoidea
FamilyAlsataspididae
Dionididae
Raphiophoridae
Trinucleidae
GenusOnnia
Tretaspis