Complex sentence: This character-state originated very early in Tetrapoda, occurs in other tetrapod groups, e.g. in lizards, and is thus no indication that the group formed of rats and apes is a clade to the exclusion of these other groups.
Split into simpler sentences: This character-state originated very early in Tetrapoda and occurs in other tetrapod groups, e.g. in lizards. There is thus no indication that the group formed of rats and apes is a clade to the exclusion of these other groups.