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Costacopluma concava
Taxonomy
Costacopluma concava was named by Collins and Morris (1975). Its type specimen is BM. In. 44642, a carapace (complete carapace), and it is a 3D body fossil. Its type locality is Anofia, Afikpo Division, which is in a Campanian offshore shale in the Nkporo Shale Formation of Nigeria. It is the type species of Costacopluma.