Vespertiliavus sp.
Late Eocene
Phosphorites de Quercy
Near Cahors, Les Rozieres, France
4mm fully rooted molar of a rare extinct bat.

Mammal. Chiroptera.

Vespertiliavus is an extinct genus of bat known from the middle Eocene to late Oligocene of Europe – best known from the Quercy Phosphorites of France. It is an early representative of a family, the Emballonuridae (the microbats), that still lives today.

The fossil record of bats dates back to the earliest Eocene, but because of a diversity of genera described from that time, their history certainly extends back into the Paleocene. Unfortunately, only teeth and jaws have been collected from that time but complete skeletons, near-modern form and with full flight capability, have been studied from the late-Early Eocene.

Fossil bat remains appear on the market only occasionally. A bat tooth is the kind of thing that appeals to many collectors – not just mammal specialists.