Well, my suggestion would be the Turquoise-throated Puff-leg This bird remains still a mystery to me and i think the unconfirmed sighting from 1976 is nothing more than a mistaken identity. To speak of extinct plants i would say you could take the whole genus Hibiscadelphus of which three species are already extinct.
Thank for your suggestions so far. Sebbe, with recent I mean since the year 1500. And it has not have to be listed by the IUCN. And RSN, the website has already a page on the Rodrigues Saddle-backed Giant Tortoise: www.petermaas.nl/extinct/speciesinfo/rodriguesgianttortoise.htm. It contains even a drawing made by you, which you were so kindly to give permission for. But maybe I can also make another Cylindraspis page. I'll wait first for some more suggestion from other users.
Hmm...so my suggestion could be for another species. I think there is really little info in those others. Thanks for feature my pic in the site! The page is very good, but in the taxonomy of the animal, in class space, there is ''Mammalia, Aves, Reptilia'', so when you update the site you can remove the incorrect names with Reptilia. My English is very bad, I hope you can understand me.