Hemiplacophora semilunifera
From dinoflaj3
*semilunifera Cookson and Eisenack, 1965a, p.126, pl.14, figs.4–9,16. Holotype: Cookson and Eisenack, 1965a, pl.14, figs.4–5; Fauconnier and Masure, 2004, pl.29, figs.6–9. Age: late Eocene.