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Spirocyclus
Taxonomy
Spirocyclus was named by Wenz (1938) [Sepkoski's age data: Tr Ladi J Kimm]. It is not extant.
It was assigned to Heterostrophia by Sepkoski (2002); and to Orthonematidae by Kaim et al. (2006).
It was assigned to Heterostrophia by Sepkoski (2002); and to Orthonematidae by Kaim et al. (2006).