Simplify the following text for a Grade 10 native English-speaking person.
Original: This species was formerly placed in its own family , Seleviniidae , but it is now considered to be a dormouse , monotypic within the genus Selevinia .
Simplified: When it was first found , the species was placed in its own family , Seleviniidae , but now it is considered to be a dormouse , the only type within the genus Selevinia .