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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
Irregularia
Atelostomata
Spatangoida

Prenasteridae (16911328)

Children (10 direct children, 58 direct and indirect children):

Agassizia (tree size 21)

Prenaster (tree size 14)

Tripylus (tree size 5)

Anisaster (tree size 1)

Antiquobrissus (tree size 1)

Cagaster

Holcopneustes (tree size 3)

Peribrissus (tree size 3)

Waurnia

Brissomorpha