▁nom en ▁n ud um ▁and ▁probably ▁does ▁not ▁per tain ▁to ▁Kel may is aur us . ▁ ▁It ▁may ▁be ▁a ▁sau rop od ▁instead . ▁ ▁Classification ▁Kel may is aur us ▁has ▁been ▁thought ▁to ▁be ▁a ▁nom en ▁dub ium ▁due ▁to ▁its ▁sc ant y ▁remains , ▁and ▁its ▁ph y log en etic ▁position ▁was ▁uncertain . ▁It ▁has ▁usually ▁been ▁regarded ▁as ▁a ▁bas al ▁t et an ur an ▁of ▁uncertain ▁aff in ities . ▁However , ▁Kel may is aur us ▁is ▁diagn os able ▁by ▁the ▁form ▁and ▁presence ▁of ▁a ▁deeply ▁in set ▁access ory ▁gro ove ▁on ▁the ▁later al ▁side ▁of ▁the ▁dent ary , ▁the ▁main ▁to oth b ear ing ▁b one ▁of ▁the ▁lower ▁j aw . ▁Some ▁of ▁its ▁features ▁are ▁like ▁those ▁of ▁c arch arod ont osa uri ans , ▁but ▁they ▁are ▁also ▁seen ▁in ▁large ▁meg al os au roid s ▁like ▁Meg al osa urus ▁and ▁Tor v osa urus . ▁ ▁In ▁ 2 0 1 1 , ▁a ▁red es cription ▁of ▁the ▁hol ot ype ▁by ▁Stephen ▁L . ▁Br us atte , ▁Roger ▁B . ▁J . ▁B enson ▁and ▁X ing ▁X u ▁found ▁Kel may is aur us ▁to ▁be ▁valid ▁genus ▁of ▁C arch arod ont osa ur idae ▁with ▁a ▁single ▁aut ap omorph y . ▁A ▁ph y log en etic ▁analysis ▁of ▁T et an ura e ▁recovered ▁K .