Pteridospermae

ریشه

From Greek pteris 'fern' + sperma 'seed'.

مثال

• Pteridospermae are considered the precursors of modern seed plants.
• The fossil record of Pteridospermae dates back to the Paleozoic era.
• Pteridospermae were fernlike in appearance but produced seeds.

ترکیب‌های رایج

Pteridospermae fossil Extinct Pteridospermae Pteridospermae precursor