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Life-forms

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: †Trilobitomorpha
Classis: †Trilobita
Ordo: †Ptychopariida
Subordo: †Olenina
Superfamilia: Olenoidea
Stratigraphic Extension
Upper Cambrian --> Upper Ordovician

Olenina is an extinct suborder of the trilobite order Ptychopariida.[1]
Subdivisions

Superfamily Olenoidea
Family Ellipsocephaloididae
Family Olenidae
Superfamily Incertae sedis
Genus Triarthrus

References

"Order - Ptychopariida - Suborder Olenina". Trilobites.info.

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Biology Encyclopedia

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