Onychophora

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Kingdom: Animalia
Subregnum: Eumetazoa
Cladus: ParaHoxozoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Protostomia
Cladus: Ecdysozoa
Cladus: Panarthropoda
Phylum:
Familiae: Peripatidae – Peripatopsidae – †Helenodoridae – †Succinipatopsidae – †Tertiapatidae
[Source: Mayer & Oliveira, 2013; Note: No classes or ordines are used]

Classes: Udeonychophora – †Xenusia

Onychophora Grube, 1850: 275

• Grube, A.E. 1850. Die Familien der Anneliden. Archiv für Naturgeschichte. 16(1): 249–364. BHL Reference page. 

• Campbell, L.I., Rota-Stabelli, O., Edgecombe, G.D., Marchioro, T., Longhorn, S.J., Telford, M.J., Philippe, H., Rebecchi, L., Peterson, K.J. & Pisan, D. 2011. MicroRNAs and phylogenomics resolve the relationships of Tardigrada and suggest that velvet worms are the sister group of Arthropoda. PNAS 108(38): 15920–15924. DOI: 10.1073/pnas.1105499108 .
• Grimaldi, D.A., Engel, M.S. & Nascimbene, P.C. 2002. Fossiliferous Cretaceous Amber from Myanmar (Burma): Its Rediscovery, Biotic Diversity, and Paleontological Significance. American Museum Novitates 3361: 1–72. DOI: 10.1206/0003-0082(2002)361<0001:FCAFMB>2.0.CO;2 . hdl: 2246/2914 . Reference page.  [Udeonychophora and Ontonychophora treated as synonyms of Euonychophora]
• Hamer, M.L.; Samways, M.J.; Ruhberg, H. 1997: A review of the Onychophora of South Africa, with discussion of their conservation. Annals of the Natal Museum, 38: 283–312. African Journal Archive
• Hou, X. & Bergström, J. 1995. Cambrian lobopodians—ancestors of extant onychophorans? Zoological Journal of the Linnean Society 114(1): 3–19. DOI: 10.1006/zjls.1995.0014 . Reference page.  [treated as a class of Lobopodia]
• Mayer, G. & Oliveira, I. de S. 2011. Phylum Onychophora Grube, 1853. P 98 In Zhang, Z.-Q. (ed.) 2011. Animal biodiversity: an outline of higher-level classification and survey of taxonomic richness. Zootaxa 3148: 1–237. Open access. Reference page. . (PDF) Reference page. 
• Mayer, G. & Oliveira, I. de S. 2013. Phylum Onychophora Grube, 1853. In: Zhang, Z.-Q. (ed.) 2013. Animal biodiversity: an outline of higher-level classification and survey of taxonomic richness (Addenda 2013). Zootaxa 3703(1): 15–16. DOI: 10.11646/zootaxa.3703.1.5 . Reference page. 
• Murienne, J., Daniels, S.R., Buckley, T.R., Mayer, G. & Giribet, G. 2014. A living fossil tale of Pangean biogeography. Proceedings of the Royal Society (B) 281(1775): 20132648. DOI: 10.1098/rspb.2013.2648 Reference page. 
• Oliveira, I. de S. 2023. An updated world checklist of velvet worms (Onychophora) with notes on nomenclature and status of names. Zookeys 1184ː 133–260. DOI: 10.3897/zookeys.1184.107286 Reference page. 
• Oliveira, I. de S., Read, V.M.S.J. & Mayer, G. 2012. A world checklist of Onychophora (velvet worms), with notes on nomenclature and status of names. ZooKeys 211: 1–70. DOI: 10.3897/zookeys.211.3463 . Reference page. 
• Poinar, G.O. Jr. 2000. Fossil onychophorans from Dominican and Baltic amber: Tertiapatus dominicanus n.g., n.sp. (Tertiapatidae n.fam.) and Succinipatopsis balticus n.g., n.sp. (Succinipatopsidae n.fam.) with a proposed classification of the subphylum Onychophora. Invertebrate Biology 119(1): 104–109. DOI: 10.1111/j.1744-7410.2000.tb00178.x . [treated as a subphylum of Lobopodia]

• Onychophora Website
• Catalogue of Life: 2012 Annual Checklist

For more multimedia, look at Onychophora on Wikimedia Commons.