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Encrinurus (Nucleurus)
Taxonomy
Encrinurus (Nucleurus) was named by Ramsköld (1986) [Sepkoski's age data: S Ldov-m S Ldov-u Sepkoski's reference number: 1088]. It is not extant. It was considered monophyletic by Edgecombe and Chatterton (1990).
It was reranked as Nucleurus by Edgecombe and Chatterton (1990), Jell and Adrain (2002), Sepkoski (2002).
It was assigned to Encrinurus by Ramsköld (1986); to Phacopida by Sepkoski (2002); and to Encrinuridae by Edgecombe and Chatterton (1990), Jell and Adrain (2002).
It was reranked as Nucleurus by Edgecombe and Chatterton (1990), Jell and Adrain (2002), Sepkoski (2002).
It was assigned to Encrinurus by Ramsköld (1986); to Phacopida by Sepkoski (2002); and to Encrinuridae by Edgecombe and Chatterton (1990), Jell and Adrain (2002).
Species lacking formal opinion data