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Holdenius
Taxonomy
Holdenius was named by Dunkle and Bungart (1942) [Sepkoski's age data: D Fame-u Sepkoski's reference number: 521]. It is not extant.
It was assigned to Dinichthyidae by Denison (1978); and to Arthrodira by Sepkoski (2002).
It was assigned to Dinichthyidae by Denison (1978); and to Arthrodira by Sepkoski (2002).
Species