Trilobita - Trinucleida - Trinucleidae
Parent taxon: Trinucleida according to A. Bignon et al. 2020
See also Adrain 2011, Dean 1983, Harrington and Leanza 1957 and Whittington et al. 1997
Sister taxa: Alsataspididae, Dionididae, Raphiophoridae
Subtaxa: Anebolithus Auritolithus Bergamia Bettonolithus Botrioides Costonia Cryptolithinae Cryptolithoides Cryptolithus Deanaspis Decordinaspis Eirelithus Famatinolithus Furcalithus Guandacolithus Gymnostomix Hanchungolithinae Hanchungolithus Incaia Jianxilithus Lloydolithus Lordshillia Marekolithus Marrolithinae Marrolithoides Marrolithus Myinda Myindella Myttonia Nankinolithus Ningkianolithus Novaspis Onnia Paratretaspis Paratrinucleus Parkesolithus Protolloydolithus Reedolithus Reuscholithus Salterolithus Stapeleyella Telaeomarrolithus Tretaspidinae Trinucleinae Trinucleus Whittardolithus Xiushuilithus Yinpanolithus
Ecology: fast-moving low-level epifaunal suspension feeder
Distribution:
• Uhaku of Norway (1 collection)
• Dobrotivian of Czechia (2), France (5), Morocco (2), Portugal (1), Spain (1)
• Letna of Czechia (2)
• Liben of Czechia (1)
• Chazyan of Canada (1: Northwest Territories)
• Arenig of Argentina (3), Bolivia (3), China (29), France (1), the United Kingdom (6)
• Arenigian of China (23)
• Dawan of China (3)
• Ordovician to Silurian of Canada (2: Québec)
• Ordovician of Argentina (15), Australia (15), Belgium (4), Bolivia (3), Canada (35: Northwest Territories, Ontario, Quebec, Québec, Yukon), China (42), Czechia (23), France (4), Iran (2), Ireland (21), Italy (3), Kazakhstan (4), Lithuania (1), Morocco (9), New Zealand (1), Norway (76), Oman (1), Peru (2), Portugal (4), the Russian Federation (2), Spain (8), Sweden (28), Türkiye (3), the United Kingdom (176), United States (167: Iowa, Kentucky, Maine, Maryland, Nevada, New York, Ohio, Oklahoma, Pennsylvania, Pennsylvania and Virginia, Virginia), Venezuela (1)
Total: 736 collections including 834 occurrences