†Spironatus Bykova & Ptushkina 1980

Bykova & Ptushkina 1980. [New species of Spironatus from Cretaceous textulariids.] Mesezhnikov, M.S.[Ed]. [New genera and species of fossil plants and invertebrates of the USSR.], Nedra, Leningrad, 1980: 114-117. Chapter pagination: 56-57