Biota (Life)
Eukaryote (Eukarya)
Podiata
Unikont (Unikonta)
Opisthokont (Opisthokonta)
Holozoa
Filozoa
Apoikozoa (Choanozoa)
Animal (Animalia)
Metazoa
Epitheliozoa
Eumetazoa
Bilateria
Deuterostome (Deuterostomia)
Echinodermata (Echinoderms)
Sea urchin (Echinoidea)
Euechinoidea
Holasteroida
Holasteridae
Crassiholaster (23023993)
Children (2 direct children, 3 direct and indirect children):
Crassiholaster subglobosus
(tree size 1)
Crassiholaster sulciproctus