original: They make up the families Tupaiidae and Ptilocercidae and the entire order Scandentia.
simplifications: They make up the Tupaiidai, Ptilocercidae, and Scandentia families. They make up the families Tupaiidae and Ptilocercidae. They also make up the entire order Scandentia. They're the Tupaiidae and Ptilocercidae families and the Scandentia. They make up the families Tupaiidae and Ptilocercidae. They also make up the entire order Scandentia. Together they form the Tupaiidae and Ptilocercidae families. These two families are the entire Scandentia order. They make up two families and one entire order. They make up the families Tupaiidae and Ptilocercidae. They also make up the entire order Scandentia. They make up the groups Tupaiidae and Ptilocercidae and the order Scandentia. They make up the Tupaiidae, Ptilocercidae, and Scandentia families. They make up the Tupaiidae and Ptilocercidae families and the entire Scandentia order.