MICROFOSSILS/Foraminifera 451 Figure The main phyletic lines of benthic foraminifera (classes); with primitive and advanced subclasses and representative genera (modified after Mikhalevich (2004)) Class Astrorhizata Subclass Lagynana: Diplogromia, Lagynis, Phainogulmia, Xenothekella, Heterogromia, Microcometes Subclass Astrorhizana: Sorostomasphaera, Thuramminopsis, Halyphysema, Lagenammina, Astrammina, 6a,b Schizammina, Masonella, Rhabdammina, Notodendrodes, 10 Astrorhiza, 11 Saccorhiza Continued