ious ▁effort , ▁Tri pp ▁established ▁the ▁new ▁family , ▁L ich ake phal idae . ▁ ▁Work ▁on ▁the ▁En cr in ur idae ▁ ▁By ▁the ▁time ▁Tri pp ▁had ▁begun ▁working ▁on ▁the ▁Tre at ise , ▁he ▁became ▁interested ▁in ▁the ▁t uber cul ated ▁family ▁of ▁tr il ob ites --- the ▁En cr in ur idae . ▁El abor ating ▁on ▁the ▁work ▁of ▁Russian ▁p ala e ont ologist , ▁El sa ▁Rosen stein , ▁Tri pp ▁began ▁developing ▁an ▁innov ative ▁system ▁of ▁distingu ishing ▁enc rin ur id ▁tax a ▁on ▁the ▁basis ▁of ▁the ▁arrangement ▁of ▁their ▁gl ab ell ar ▁t uber cles . ▁For ▁the ▁next ▁several ▁dec ades , ▁this ▁was ▁an ▁important ▁part ▁of ▁enc rin ur ine ▁diagn oses . ▁For ▁example , ▁he ▁used ▁gl ab ell ar ▁t uber cle ▁arrangement ▁to ▁help ▁character ize ▁" species ▁groups " ▁that ▁F . R . C . ▁Re ed ▁had ▁recognized ▁within ▁En cr in urus . ▁This ▁set ▁the ▁ground work ▁for ▁an ▁event ual ▁major ▁splitting ▁of ▁a ▁genus ▁that ▁had ▁become ▁a ▁virtual ▁garbage ▁p ail ▁of ▁enc rin ur ids . ▁While ▁he ▁did ▁author ▁some ▁of ▁these ▁gener a ▁himself ▁to ▁ease ▁this ▁confusion , ▁he ▁was ▁extremely ▁c aut ious ▁to ▁avoid ▁over - spl itting ▁and ▁creating ▁too ▁many ▁names . ▁ ▁Later ▁years ▁ ▁While ▁as ▁Research ▁Associ ate ▁at ▁the ▁Natural ▁History ▁Museum ▁( Lond on ) ▁and