Pikaia gracilens
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[edit]
Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Cephalochordata
Genus: †Pikaia
Species: †Pikaia gracilens
Name[edit]
Pikaia gracilens Walcott, 1911