Related how?

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
Platyzoa
Acanthocephala (Acanthocephalans)
Palaeacanthocephala
Echinorhynchida

Arhythmacanthidae (2519383)

Children (6 direct children, 65 direct and indirect children):

Neoacanthocephaloidinae (tree size 18)

Euzetacanthus (tree size 3)

Arhythmacanthinae (tree size 20)

Paracanthocephaloidinae (tree size 15)

Spiracanthus (tree size 1)

Neoacanthocephaloides (tree size 2)