That is, the conduplicate genera have a crown
age of 42.3610.9 Mya (youngest age) to 46.5611.9 Mya (oldest
age, in the Eocene), but the most recent common ancestors of
Paphiopedilum and Phragmipedium are dated back to 22.265.9 Mya
(oldest age) and 24.466.7 (oldest age) Mya, respectively (Table 3,
Fig. 4)