▁longer ▁than ▁the ▁entire ▁body , ▁from ▁ce phal on ▁( head ) ▁to ▁pyg id ium ▁( tail ). ▁The ▁sections ▁of ▁the ▁pyg idia ▁are ▁leaf - like ▁in ▁shape ▁and ▁also ▁typically ▁end ▁in ▁sp ines . ▁ ▁The ▁order ▁is ▁divided ▁into ▁two ▁families , ▁L ich idae , ▁and ▁L ich ake phal idae . ▁ ▁Some ▁exper ts ▁group ▁the ▁families ▁of ▁the ▁closely ▁related ▁order ▁Od ont ople ur ida ▁within ▁L ich ida , ▁too , ▁where up on ▁the ▁family ▁is ▁then ▁divided ▁into ▁three ▁super famil ies , ▁D ames ello idea , ▁containing ▁the ▁family ▁D ames ell idae , ▁L ich o idea , ▁containing ▁the ▁families ▁L ich idae ▁and ▁L ich ake phal idae , ▁and ▁Od ont ople uro idea , ▁containing ▁the ▁family ▁Od ont ople ur idae . ▁ ▁Tax a ▁tradition ally ▁placed ▁within ▁L ich ida ▁ ▁As ▁mentioned ▁earlier , ▁the ▁order ▁L ich ida ▁is ▁divided ▁into ▁two ▁families . ▁ ▁L ich idae ▁▁ ▁A can th opy ge ▁ ▁Ak anth arg es ▁All ol ich as ▁Am ph il ich as ▁A pat ol ich as ▁Ar ct in urus ▁Aut ol ox ol ich as ▁B ore al arg es ▁Cer at arg es ▁Con ol ich as ▁C ras ped arg es ▁Dic ran og mus ▁Dic ran op elt is ▁E chin ol ich as ▁E if li arg es ▁G asp el ich as ▁H