The American mastodon is the most recent and best-known species of the genus.
The most recent species added to the list was Great Skua in 2011.
However, this trait has been lost on some recent species.
Both recent species breed on cliffs, laying a single white egg.
As such, it appears that N. burbidgeae is a relatively recent species in evolutionary terms.
It had a more fused test than more recent species and was better preserved.
For this reason, further research is needed to confirm or deny the recent species splits.
The most recent species of coelacanth in the fossil record is the Macropoma.
As a result the palm frog is the most recent species of the family to have been discovered (in 2000).
S. mahnerti is one of the more recent species to be introduced to the aquarium trade.