Trilobita - Ptychopariida - Raymondinidae
Synonyms: Crotalurus Volborth 1858, Ischyrophyma Whittington 1963
Parent taxon: Raymondinidae according to J. M. Adrain and S. R. Westrop 2007
See also BergstroĢm and Suzuki 2005, Jell and Adrain 2002 and Sepkoski 2002
Sister taxa: Celmidae, Glaphurella, Glaphuridae, Glaphurus, Raymondina, Varanella
Subtaxa: Celmus granulatus Celmus michaelmus Ischyrophyma tuberculata Ischyrophyma tumida
Type: Celmus granulatus
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Whiterockian of Canada (2: Newfoundland and Labrador collections), United States (1: Nevada)
• Chazyan of Canada (2: Newfoundland and Labrador)
• Hunderum of Sweden (1)
• Langevoja of Sweden (3)
• Arenig of Canada (1: Newfoundland and Labrador)
• Ordovician of Canada (2: Newfoundland, Newfoundland and Labrador), China (3), Ireland (1)
Total: 16 collections including 19 occurrences
Specimen images are retrieved through the ePANDDA API.
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