Phylum

Onychophora Grube, 1853

List of species

1. Xenusion Pompeckj ,1927 | Lower Cambrian (old nomenclature)

2. Xenusion auerswaldae Pompeckj. 1927 | Lower Cambrian (old nomenclature)

Classification

Organism group	Biota
Kingdom	Animalia
Phylum	Agmata
	Annelida
	Arthropoda
	Brachiopoda
	Bryozoa
	Chaetognatha
	Chordata
	Cnidaria
	Echinodermata
	Hemichordata
	Mollusca
	Onychophora
Species	Xenusion
Phylum	Porifera
	Priapulida
Class	Chitinozoa
	Tentaculita
	Trilobozoa
Order	Hyolithelminthida
	Tommotiida
Suborder	Hederellida
Family	Anabaritidae
	Ancientidae
	Cloudinidae
	Mobergellidae
	Rukhinellidae
	Wiwaxidae
	Wiwaxiidae
Genus	Baltinema
	Clistrocystis
	Cochleatina
	Coleoloides
	Cyclomedusa
	Estoniadiscus
	Eurytholia
	Marcusodictyon
	Melopetasus
	Moyeronia
	Onuphionella
	Parachitina
	Pollingeria
	Vaccipraticola