Trilobita - Trinucleida - Alsataspididae
Parent taxon: Trinucleida according to A. Bignon et al. 2020
See also Adrain 2011 and Whittington et al. 1997
Sister taxa: Dionididae, Liostracinidae, Raphiophoridae, Trinucleidae
Subtaxa: Araiopleura Clavatellus Falanaspis Gaoloupingia Hapalopleuridae Jegorovaia Jegorovaiidae Joshuaspis Macharia Orometopidae Orometopus Pagometopus Palquiella Rhadinopleura Seleneceme Skljarella Spirantyx Torifera Yumenaspis Zacompsus
Ecology: fast-moving low-level epifaunal carnivore
Distribution:
• Whiterockian of Norway (1 collection)
• Arenig of Argentina (2), Bolivia (1), France (1), Sweden (2), the United Kingdom (1)
• Arenigian of Argentina (1)
• Ordovician of Argentina (7), Canada (3: Newfoundland, Northwest Territories, Yukon), Norway (11), the Russian Federation (1), Sweden (5), the United Kingdom (8)
• Tremadoc of Argentina (31), Bolivia (1), the Czech Republic (2), Morocco (1), Norway (1), Sweden (3)
• Skullrockian of Argentina (1)
• Ibexian of Norway (2)
• Taoyuanian of China (5), the Russian Federation (1), South Korea (8)
• Cambrian of Argentina (1), Australia (2), Canada (8: Newfoundland and Labrador, Quebec, Yukon), China (26), India (3), Kazakhstan (15), the Russian Federation (8), South Korea (1), the United Kingdom (2), United States (1: Nevada)
Total: 167 collections including 182 occurrences