Artiopoda - Ptychopariida - Ptychopariidae
Synonym: Syspacephalus Resser 1936
Parent taxon: Ptychopariidae according to P. A. Jell and J. M. Adrain 2002
See also Palmer and Halley 1979, Resser 1936 and Sepkoski 2002
Sister taxa: Achlysopsis, Altikolia, Altitudella, Amecephalites, Asthenopsis, Austinvillia, Balangcunaspis, Bathyholcus, Bathyocos, Billingsaspis, Binodaspis, Bolaspidina, Braintreella, Brunswickia, Caborcella, Cathayanella, Champlainia, Chengshanaspis, Conopolus, Deltina, Douposiella, Entsyna, Eodouposiella, Eokaotaia, Eoptychoparia, Eosoptychoparia, Eospencia, Eurostina, Gaotanaspis, Gaphuraspis, Gedongaspis, Gunnia, Holasaphus, Illtydaspis, Jangudaspis, Jiagouia, Jialaopsis, Jianchangia, Jiumenia, Kaotaia, Kermanella, Kochiella, Kochiellina, Kounamkites, Kunmingaspis, Laminurus, Laoyingshania, Luxella, Lyriaspis, Meitania, Meniscopsia, Monanocephalus, Mufushania, Nangaoia, Nangaops, Nassovia, Neoblairella, Neoregina, Olenekina, Onchocephalites, Orienturus, Orlovia, Orloviella, Pachyaspis, Paleonelsonia, Palmerara, Palmeraspis, Panacus, Paraeosoptychoparia, Parahiolites, Paraperiomma, Paraplagiura, Parapoulsenia, Paraziboaspis, Periommella, Piaziella, Pingluaspis, Piochella, Plagiura, Plesiamecephalus, Poulsenella, Poulsenia, Probowmania, Probowmaniella, Probowmanops, Proliostracus, Protohedinia, Psilostracus, Ptychopariinae, Qiaotouaspis, Reedus, Regius, Salankanaspis, Sanduspis, Sanwania, Semisphaerocephalus, Shantungaspis, Shuiyuella, Sinoptychoparia, Spencella, Spencia, Stoecklinia, Suluktella, Syspacephalus redpathi, Syspacephalus unca, Tonopahella, Townleyella, Trigonyangaspis, Tukalandaspis, Ulrichaspis, Variopelta, Vermontella, Volocephalina, Wanhuaia, Weijiaspis, Wuhaina, Xingrenaspis, Yaojiayuella, Yohoaspis, Ziboaspidella, Ziboaspis
Subtaxa: Ptychoparella lloydi Ptychoparella mettae Ptychoparella minuta Ptychoparella usualis Syspacephalus cadyi Syspacephalus charops Syspacephalus crassus Syspacephalus gregarius Syspacephalus laticeps Syspacephalus longus Syspacephalus mccollumorum Syspacephalus vapidus Syspacephalus variosus Syspacephalus werneckensis
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Cambrian of Canada (8: Brithish Columbia, British Columbia, Northwest Territories, Yukon Territory collections), China (2), Greenland (4), United States (54: California, Nevada, Nevada and California, Pennsylvania, Utah, Vermont)
• Templetonian of United States (1: Nevada)
• Amgan of the Russian Federation (1)
Total: 70 collections including 78 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.