 Lavanify is known from the complete cheektooth UA 8653 and the broken tooth FMNH PM 59520 . Krause and colleagues could not determine whether the teeth were from the lower or upper jaw and whether they were molars or molariform ( molar @-@ like ) premolars , but suggested that they represented two different tooth positions . However , Wilson and colleagues in 2007 tentatively identified UA 8653 as a left fourth ( last ) lower molariform ( mf4 ) ; because molars and premolars of gondwanatheres cannot be reliably distinguished , the term " molariform " is used instead . FMNH PM 59520 resembles the Gondwanatherium fossil MACN Pv @-@ RN 1027 , a broken tooth that may be an upper molariform . In both Lavanify teeth , the enamel surface features perikymata ( ridges and grooves arranged in a transverse , wave @-@ like pattern ) . 
