Related how?

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
Echinacea (Echinacea (animal))

Phymosomatoida (3381981)

Children (9 direct children, 227 direct and indirect children):

Phymosomatidae (tree size 66)

Stomechinidae (tree size 69)

Polydiaematidae (tree size 9)

Heterodiadematidae (tree size 18)

Emiratiidae (tree size 12)

Diplopodiidae (tree size 44)

Gomphechinus

Plistophyma

Winkleria