▁two ▁sub famil ies ▁without ▁comment . ▁These ▁two ▁sub famil ies ▁were ▁named ▁A can th oph ol inae ▁and ▁Str uth ios aur inae . ▁ ▁In ▁the ▁same ▁year , ▁he ▁corrected ▁the ▁sub groups ▁of ▁Th y re op hora . ▁He ▁placed ▁A can th oph olid idae , ▁Ste g osa ur idae ▁and ▁Cer at ops idae ▁together ▁inside ▁the ▁group . ▁Five ▁years ▁later , ▁he ▁corrected ▁the ▁name ▁of ▁the ▁family ▁to ▁A can th oph ol idae , ▁which ▁is ▁now ▁the ▁correct ▁sp elling . ▁In ▁the ▁same ▁publication , ▁he ▁also ▁changed ▁the ▁gener a ▁included . ▁He ▁assigned ▁Hy la e osa urus , ▁Ste g oc eras , ▁Str uth ios aur us , ▁and ▁Tro odon ▁inside ▁it ▁but ▁moved ▁Ste g op elta ▁and ▁An k yl osa urus ▁into ▁the ▁family ▁An k yl osa ur idae . ▁N op cs a ▁then ▁down grad ed ▁the ▁ph y log en etic ▁rank ▁of ▁A can th oph ol idae ▁to ▁make ▁it ▁a ▁sub family ▁inside ▁N od osa ur idae . ▁The ▁cla de ▁was ▁defined ▁to ▁include ▁An k yl osa urus ▁and ▁A can th oph ol inae . ▁Inside ▁A can th oph ol inae ▁he ▁placed ▁A can th oph olis , ▁Hy la e osa urus , ▁Rh od an osa urus , ▁Str uth ios aur us , ▁and ▁Tro odon . ▁Now ▁considered ▁as ▁an ▁artificial ▁grouping