Also, paraphyletic groups are involved in evolutionary transitions, the development of the first tetrapods from their ancestors for example. Source: Internet
A second, dorsal aorta carries oxygenated blood from the gills to the rest of the body, and is homologous with the descending aorta of tetrapods. Source: Internet
Amniotes acquired new niches at a faster rate than before the collapse and at a much faster rate than primitive tetrapods. Source: Internet
In bony fish and tetrapods the external opening into the inner ear has been lost. Source: Internet
Even snakes, whose limbs have become vestigial or lost entirely, are nevertheless tetrapods. Source: Internet
However, tetrapods are descendants of the nearest common ancestor of Actinopterygii and Sarcopterygii, and tetrapods are not in Osteichthyes defined in this way, so the group is paraphyletic. Source: Internet