Heteronymphon

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum: Arthropoda
Subphylum: Chelicerata
Classis: Pycnogonida
Ordo: Pantopoda
Subordo: Eupantopodida
Superfamilia: Nymphonoidea

Familia: Nymphonidae
Genus: Heteronymphon
Species: H. abyssale - H. bioculatum - H. birsteini - H. caecigenum - H. exiguum - H. horikoshii - H. kempi - H. ponsitor - H. profundum
References

Sirvid, P.J. et al. 2010: [Chapter] SIX Phylum ARTHROPODA CHELICERATA horseshoe crabs, arachnids, sea spiders. Pp. 50-89 in Gordon, D.P. (ed.): New Zealand inventory of biodiversity. Volume 2. Kingdom Animalia. Chaetognatha, Ecdysozoa, ichnofossils. Canterbury University Press, Christchurch, New Zealand. ISBN 978-1-87725793-3