The presence of a similar cellular endosperm with unequal division has also been reported in other ancient angiosperms (Floyd and Friedman, 2000; Tobe et al., 2000) and seems to be a plesiomorphic feature in angiosperms.
Thus, several seemingly "ephedroid" features of Siphonospermum may instead be plesiomorphic in the Gnetales, and retained in Siphonospermum.
Alternate leaves are inferred to be plesiomorphic in Pedicularis, with multiple transitions to opposite/whorled phyllotaxy.
Large litters are primitive for mammals in general, and because suoids are plesiomorphic in some anatomical conditions relative to other artiodactyls (e.g., short legs, retention of four digits, bunodont cheek teeth), they have been assumed to be plesiomorphic in other respects.
Alternatively, the "slow-climbing" features of lorisid anatomy may be plesiomorphic for all lorisoids [ 74].
According to our data, P. harmeri, which demonstrates numerous plesiomorphic features in organization of different organ systems [ 54, 69], have tentacles as larvae, juvenile, and adult.
This result is unsurprising in the light of our molecular topology, which shows the morphology characteristic of Amitostigma to be plesiomorphic; hence, bursicles are plesiomorphic, having been inherited from the ancestor of the entire East Asia Clade.
The examination of pistil anatomy reveals features showing a simple pollen pistil interaction that are likely to be plesiomorphic for all angiosperms.
However, there have also been suggestions that syndactyly may be plesiomorphic for larger marsupial clades, and has subsequently been lost in some clades [ 23, 26, 27].
This is likely to be plesiomorphic, because all known snakefly larvae as well as many adults have this feature [ 27].
