Simplify the following text for a Grade 12 native English-speaking person.
Original: Three genera , Uranomys , Lophuromys , and Acomys were once considered to be murines - Later , it was discovered that they were more closely related to gerbils through molecular phylogenetics .
Simplified: Three genera , Uranomys , Lophuromys , and Acomys were once considered to be murines , but were found to be more closely related to gerbils through molecular phylogenetics .