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Borealis
Taxonomy
Borealis was named by Boucot et al. (1971) [Sepkoski's age data: S Ldov-l S Ldov-m Sepkoski's reference number: 24,25]. It is not extant.
It was assigned to Pentamerinae by Temple (1987); to Virgianinae by Williams et al. (2002); and to Pentamerida by Sepkoski (2002).
It was assigned to Pentamerinae by Temple (1987); to Virgianinae by Williams et al. (2002); and to Pentamerida by Sepkoski (2002).
Species