The Giant Vampire Bat was described in 1988 based on bones that were recovered from deposits of a cave in the state of Monagas, northern Venezuela. Further remains were found in Argentina, Belize, Bolivia, Brazil, Ecuador, and Mexico.
The exact age of these bones cannot be determined, they may be of late Pleistocene or early Holocene age, some scientists even think that this species may still exist. 
The Giant Vampire Bat wasn’t a real giant, in fact it was only 30% larger than its next living relative, the Common Vampire Bat (Desmodus rotundus Geoffroy) (see photo).
 G. S. Morgan; O. J. Linares; C. E. Ray: New species of fossil vampire bats (Mammalia, Chiroptera, Desmodontidae) from Florida and Venezuela”. Proceedings of the Biological Society of Washington. 101(4): 912–928. 1988
The Scarlet Stub-foot Toad was described in 1983, it was restricted to the vicinity of a single stream in an isolated cloud forest named Paramito de San Francisco near the town of Guaraque, in Mérida State, Cordillera de Mérida, Venezuela.
Both sexes were very distinctly bright orange colored.
The Scarlet Stud-foot Toad is now most certainly extinct, it disappeared due to habitat loss, yet another reason for its disappearance were severe dry seasons which coincided with epidemic events caused by the deadly fungal chytridiomycosis disease.
The Pinango Stub-foot Toad also known as Green And Red Venter Harlequin Toad was described in 1982, it is, or was restricted to the forest around the village of Piñango in the Estado Mérida in eastern Venezuela, where it formerly was said by the locals to have been very abundant.
The species was distinctly yellowish colored.
The Pinango Stub-foot Toad suffered from habitat destruction that left the forests it inhabited highly fragmented, and from the introduction of exotic trouts into the local rivers, which again very probably fed on the tadpoles.
The species appears now to be extinct.
 Enrique La Marca: Venezuelan Harlequin Frogs: In the face of extinction? Reptilian Magazine 3(8):22-24. 1995