Biota (Life)
Eukaryote (Eukarya)
Podiata
Unikont (Unikonta)
Opisthokont (Opisthokonta)
Holozoa
Filozoa
Apoikozoa (Choanozoa)
Animal (Animalia)
Metazoa
Epitheliozoa
Eumetazoa
Bilateria
Nephrozoa (Eubilateria)
Protostome (Protostomia)
Spiralia (Spiralians)
Lophotrochozoa
Brachiozoa (Phoronozoa)
Brachiopoda (Lamp shell)
Rhynchonelliformea
Rhynchonellata
Athyridida
Retziidina
Retzioidea
Children (2 direct children, 2 direct and indirect children):
Retzia
Acambona