Full reference: C. D. Walcott. 1890. Descriptive notes of new genera and species from the Lower Cambrian or Olenellus zone of North America. Proceedings of the United States National Museum 12:33-46
Parent taxon: Olenellina according to J. M. Adrain 2011
See also Lieberman 1998, Lieberman 2001, Palmer and Repina 1993, Skovsted 2006 and Webster 2007
Sister taxa: Bradyfallotaspis, Fallotaspidoidea, Judomioidea, Nevadioidea, Poletaevella, Campropallus
Subtaxa: Biceratopsidae Holmiidae Laudoniidae Olenellidae Wanneriidae
Ecology: fast-moving low-level epifaunal deposit feeder
Distribution:
• Delamaran of Canada (1: British Columbia collection), Morocco (2), United States (4: California, Virginia)
• Waucoban of Canada (3: British Columbia, Northwest Territories), United States (1: Nevada)
• Cambrian of Argentina (3), Canada (93: Alberta, British Columbia, Labrador, Newfoundland, Newfoundland and Labrador, Northern Territories, Northwest Territories, Nunavut, Yukon Territory), Greenland (25), Mexico (6), Morocco (2), Norway (6), Poland (2), the Russian Federation (1), Svalbard and Jan Mayen (3), Sweden (1), United States (256: Arizona, California, Maryland, Nevada, New York, Pennsylvania, Utah, Vermont, Virginia, Washington)
• Caerfai of Canada (2: Northwest Territories, Nunavut), United States (5: Nevada, New York)
Total: 416 collections including 820 occurrences