Parent taxon: Antagmidae according to P. A. Jell and J. M. Adrain 2002
See also Constantin 1999 and Sepkoski 2002
Sister taxa: Antagmus, Bicella, Bilimbataia, Crassifimbra, Erzishania, Houmengia, Lermontoviella, Longshania, Mantoushania, Onchocephalina, Periomma, Sombrerella, Xiangqianaspis, Xiaomajiella, Yuehsienszella
Subtaxa: Onchocephalus buelnaensis Onchocephalus dudensis Onchocephalus maior Onchocephalus mexicanus Onchocephalus palupus Onchocephalus parvus Onchocephalus sanwanensis Onchocephalus thia Onchocephalus veridicus
Type: Ptychoparia thia
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Cambrian of Canada (3: British Columbia collections), China (2), Greenland (4), Mexico (1), the Russian Federation (1), United States (4: California, Nevada, Virginia)
• Solvan of Canada (8: British Columbia)
• Delamaran of Canada (3: British Columbia), United States (3: Nevada)
Total: 29 collections including 39 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.