extinct genus subfamily described genus contains described species known group fossils found north_america south_america europe genus initially placed subfamily later placed believed ancestor extant primitive genus australia despite member tribe regarded authors believe assigned ants characterised large body length ranging long thin legs elongated history classification described genus known solitary fossil preserved impression fine formation colorado fossil recovered july station fossil site near trail currently deposited collections counterpart additional fossils known studied type description new genus species published specific epithet reference like outline seen type specimen placed genus subfamily noted similarities suggesting intermediate genera genus described moved genus placement challenged paper russian moved genus time primitive based close similarity additional species fossil described rio region argentina placed species new genus genus placed subsequently moved second species described placed new genus recovered area distinguished new species based characteristics wing difference size type specimens series fossils genera examined based notable similarities species genera treating junior synonyms fourth species described based fossils found site germany specific epithet chosen honour placed subfamily classified genus latin uncertain placement subfamily placed tribe placement classified switzerland classified genus family decision stating characters similar insect lower cretaceous placed shares similar structure ants insects order key traits ants observed described species elongated segment antenna key trait report describing new fossils accepted classification colleagues comments following generated colleagues possible phylogenetic position ants subfamily possible ancestor description general individuals head capsule bears set enlarged rectangular triangular outline mixed arrangement teeth denticles smaller teeth inside margin long legs long elongated narrow waist usually smooth profile upper surface structure combination little abdominal segments iii unique genus separates genera reported specimens giving body length currently preserved collection head capsule slightly little longer wide having elongated notably shorter head massive times long tall legs like species long thin unlike species post type specimen numbers counterpart females type species body length estimated small shorter sporting short thick sting length head excluding middle preserved specimens brown upper area head black similar head antennae borne long passes edge margin head short larger teeth interspersed small denticles length head capsule believed long thin narrow long width greater length legs noticeably elongated thin narrow stalk connects abdomen slightly convex numbered housed female estimated body length described relatively massive times long tall oval shaped notable post abdominal segment seen species head capsule long head capsule large teeth longer margin antenna composed estimated segments legs elongated narrow weakly convex segment distinguished species massive size post absence previously thought antennae seven segments mentions original description provided match description provided germany described single approximately found pit fossil believed million years old measures length head diameter eyes species head shorter wide long head triangular outline eyes oval shaped species long length past margin head profile straight weakly concave weakly rounded present small denticles weakly convex legs long developed long sting species distinguished ants long shape shorter compact dorsal surface convex
Archimyrmex