''Mystacina'' is the sole surviving genus of the family Mystacinidae. The New Zealand lesser short-tailed bat is the only member of this group confirmed to survive today, since the closely related New Zealand greater short-tailed bat possibly went extinct as recently as 1965. A third species, ''

Mystacina miocenalis ''Mystacina'' is the sole surviving genus of the family Mystacinidae. The New Zealand lesser short-tailed bat is the only member of this group confirmed to survive today, since the closely related New Zealand greater short-tailed bat possibly wen ...

'', is known from the

Middle Miocene The Middle Miocene is a sub-epoch of the Miocene Epoch made up of two stages: the Langhian and Serravallian stages. The Middle Miocene is preceded by the Early Miocene. The sub-epoch lasted from 15.97 ± 0.05 Ma to 11.608 ± 0.005 Ma (million y ...

some 19-16 million years ago.

References

{{Taxonbar, from= Q368565 Bat genera Mammal genera with one living species Taxa named by John Edward Gray Mystacinidae Mammals of New Zealand Endemic fauna of New Zealand Endemic mammals of New Zealand