Which species listed is speculated to have a wild lifespan reaching the 'late teens'?

Answer

Natal Black snake (Microlaps microlepidotus)

The fossorial species, the Natal Black snake (*Microlaps microlepidotus*), is speculated by researchers to reach the late teens in the wild.

Which species listed is speculated to have a wild lifespan reaching the 'late teens'?
animalLongevitysnake