Artiopoda - Agnostida - Peronopsidae
Alternative spelling: Svenax
Parent taxon: Peronopsis according to E. B. Naimark 2012
See also Jell and Adrain 2002 and Sepkoski 2002
Sister taxa: Peronopsis (Armagnostus), Peronopsis (Proacadagnostus), Peronopsis (Vulgagnostus), Peronopsis amplaxis, Peronopsis angustilimbatus, Peronopsis bilobus, Peronopsis bulkurensis, Peronopsis curtus, Peronopsis cylindrica, Peronopsis elkedraensis, Peronopsis elongatus, Peronopsis fallax, Peronopsis guoleensis, Peronopsis inarmata, Peronopsis integer, Peronopsis integra, Peronopsis intermedius, Peronopsis ozakii, Peronopsis prodigialis, Peronopsis pseudointerstrictus, Peronopsis roddyi, Peronopsis shandongensis, Peronopsis taitzuhoensis, Peronopsis ultimus, Peronopsis xichuanensis
Subtaxa: Peronopsis (Svenax) egenus Peronopsis (Svenax) pusillus
Distribution:
• Cambrian of Australia (1 collection), Denmark (2), Kazakhstan (3), Sweden (3), the United Kingdom (1)
• Amgan of the Russian Federation (1)
Total: 11 collections each including a single occurrence