Fig. 5

Fruits and seeds of Primotrapa weichangensis from the Miocene of Weichang, China. a Muddy siltstone with three P. weichangensis fruits exposed on the surface. PEPB70631. b-g Laterally compressed fruits, each showing a persistent floral cup with 1–4 remaining sepals, ribbed fruit surface, persistent peduncle, and probably one seed in the fruit (f). PEPB70632–70637. h-j Laterally compressed seeds of P. weichangensis. PEPB70681–70683. k-l SEM of the seed surface, showing irregularly shaped, pentagonal to hexagonal cells