They acknowledged some concern about precisely where C. exanthemata should come to rest taxonomically, but noted they were at work on a monograph which, “it is hoped, may result in a more natural and serviceable classification of the fossil species than the one now in use.” I don’t think they ever followed through on this. The taxonomic history of A. exanthemata prepared by Forester in 1980 includes no subsequent publication of theirs.
[Later edit: I dropped a paragraph from the original post which suggested that the two species may actually be males and females of the same species. I believe I misread a study by Frederick M. Swain (Some Upper Miocene and Pliocene(?) Ostracoda of Atlantic Coaster Region for Use in Hydrogeologic Studies, U.S. Geological Survey Professional Paper 821, 1974, p. 30.).]