Species: Felis catus. ◊◊◊ The cat belongs in the Domain Eukarya because their cells have a nucleus and membrane-bound organelles. ◊◊◊. ◊◊◊ As a member of the kingdom Animalia, locomotion is a distinct characteristic. ◊◊◊. ◊◊◊ They are part of the phylum Chordata for many reasons.