Trilobita - Ptychopariida - Ptychopariidae
Synonyms: Elrathina Resser 1937, Syspacephalus Resser 1936
Parent taxon: Ptychopariidae according to P. A. Jell and J. M. Adrain 2002
See also Caron and Jackson 2008, Palmer and Halley 1979, Resser 1936, Sepkoski 2002 and Sundberg 1994
Sister taxa: Achlysopsis, Altikolia, Altitudella, Amecephalites, Asthenopsis, Austinvillia, Balangcunaspis, Bathyholcus, Bathyocos, Billingsaspis, Binodaspis, Bolaspidina, Braintreella, Brunswickia, Caborcella, Cathayanella, Champlainia, Chengshanaspis, Conopolus, Deltina, Douposiella, Entsyna, Eokaotaia, Eoptychoparia, Eospencia, Eurostina, Gaotanaspis, Gaphuraspis, Gedongaspis, Gunnia, Holasaphus, Illtydaspis, Jangudaspis, Jiagouia, Jialaopsis, Jianchangia, Jiumenia, Kaotaia, 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, Regius, Salankanaspis, Sanwania, Semisphaerocephalus, Shantungaspis, Shuiyuella, Sinoptychoparia, Spencella, Spencia, Stoecklinia, Suluktella, Syspacephalus redpathi, Syspacephalus unca, Townleyella, Trigonyangaspis, Tukalandaspis, Ulrichaspis, Variopelta, Vermontella, Volocephalina, Wanhuaia, Weijiaspis, Wuhaina, Xingrenaspis, Yaojiayuella, Yohoaspis, Ziboaspidella, Ziboaspis
Subtaxa: Elrathina antiqua Elrathina cordillerae Elrathina marginalis Elrathina offula Elrathina wheelera 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 epifaunal detritivore
Distribution:
• Amgan of United States (2: Utah collections)
• Solvan of Canada (5: Newfoundland and Labrador)
• Delamaran of Canada (21: British Columbia), Mexico (1), United States (39: California, California-Nevada, Nevada, Nevada and California, Pennsylvania, Vermont)
• Cambrian of Canada (13: Alberta-British Columbia, Brithish Columbia, British Columbia, Northwest Territories, Yukon Territory), China (2), Greenland (4), United States (33: Georgia, Idaho, Montana, Nevada, Pennsylvania, Utah, Vermont)
Total: 120 collections including 129 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.