Biota (Life)
Eukaryote (Eukarya)
Podiata
Unikont (Unikonta)
Opisthokont (Opisthokonta)
Holozoa
Filozoa
Apoikozoa (Choanozoa)
Animal (Animalia)
Metazoa
Epitheliozoa
Eumetazoa
Bilateria
Deuterostome (Deuterostomia)
Hemichordata (Hemichordates)
Enteropneusta (Acorn worm)
Spengelidae
Children (3 direct children, 3 direct and indirect children):
Willeyia delagoensis
Willeyia loya
Willeyia bisulcata