Trilobita - Ptychopariida - Alokistocaridae
Synonyms: Anomalocephalus Deiss 1939, Clappaspis Deiss 1939
Parent taxon: Alokistocaridae according to P. A. Jell and J. M. Adrain 2002
See also Caron and Jackson 2008, Palmer 1954, Sepkoski 2002 and Sundberg 1994
Sister taxa: Alokistocare, Alokistocarella, Amecephalina, Amecephaloides, Amecephalus, Annamitia, Arellanella, Beldirella, Bythicheilus, Chancia, Chanciaopsis, Danzhaiaspis, Ehmania, Elrathia, Erdoradites, Ganovexopyge, Inglefieldia, Jenkinsonia, Kistocare, Lenacare, Parapachyaspis, Parehmania, Pedinocephalina, Proveedoria, Schopfaspis, Shabanovia, Tympanuella, Utaspis, Ehmaniellinae, Altiocculinae
Subtaxa: Clappaspis coriacea Clappaspis dotis Clappaspis idahoensis Clappaspis lanata Clappaspis spencei Ehmaniella angustigena Ehmaniella casta Ehmaniella fronsplanata Ehmaniella quadrans Ehmaniella similis Ehmaniella waptaensis
Type: Crepicephalus (Loganellus) quadrans
Ecology: fast-moving epifaunal detritivore
Distribution:
• Solvan of Greenland (1 collection)
• Delamaran of Canada (26: British Columbia), Mexico (1), United States (5: Idaho, Nevada, Utah)
• Cambrian of Argentina (1), Canada (7: British Columbia, Newfoundland), China (3), Kazakhstan (1), United States (5: California, Idaho, Utah)
Total: 50 collections including 61 occurrences
Specimen images are retrieved through the ePANDDA API.
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