If one analyse a dataset of extinct species when the most recent species date is fixed and can not be sampled. A possible fix is to add the present time as an element of the tree and also condition the tree likelihood on the extinction of the clade until present.
If one analyse a dataset of extinct species when the most recent species date is fixed and can not be sampled. A possible fix is to add the present time as an element of the tree and also condition the tree likelihood on the extinction of the clade until present.