The Medullosales is an extinct order of pteridospermous seed plants characterised by large ovules with circular cross-section and a vascularised nucellus...

seed plants tend to be referred to as pteridosperms: Lyginopteridales, Medullosales, Callistophytales and Peltaspermales, with "Mesozoic seed ferns" including...

†Czekanowskiales †Gigantopteridales †Glossopteridales †Lyginopteridopsida †Medullosales †Peltaspermopsida †Pentoxylopsida †Petriellales Acrogymnospermae (living...

†Czekanowskiales †Gigantopteridales †Glossopteridales †Lyginopteridopsida †Medullosales †Peltaspermopsida †Pentoxylopsida †Petriellales Acrogymnospermae (living...

†Caytoniales †Gigantopteridales †Glossopteridales †Lyginopteridales †Medullosales †Peltaspermales †Umkomasiales (corystosperms) †Czekanowskiales †Bennettitales...

†Czekanowskiales †Gigantopteridales †Glossopteridales †Lyginopteridopsida †Medullosales †Peltaspermopsida †Pentoxylopsida †Petriellales Acrogymnospermae (living...

†Czekanowskiales †Gigantopteridales †Glossopteridales †Lyginopteridopsida †Medullosales †Peltaspermopsida †Pentoxylopsida †Petriellales Acrogymnospermae (living...

Gigantopteridales Order Glossopteridales Order Lyginopteridales Order Medullosales Order Peltaspermales Order Corystospermales (also known as Umkomasiales)...

†Czekanowskiales †Gigantopteridales †Glossopteridales †Lyginopteridopsida †Medullosales †Peltaspermopsida †Pentoxylopsida †Petriellales Acrogymnospermae (living...

†Czekanowskiales †Gigantopteridales †Glossopteridales †Lyginopteridopsida †Medullosales †Peltaspermopsida †Pentoxylopsida †Petriellales Acrogymnospermae (living...