▁E ms ian ▁( or ▁Lower ▁Dev onian ) ▁and ▁has ▁been ▁found ▁in ▁Germany ▁( P . ▁ps y che ) ▁and ▁Mor oc co . ▁It ▁is ▁character ized ▁by ▁the ▁sword like ▁extension ▁from ▁the ▁front ▁of ▁the ▁head . ▁ ▁Description ▁ ▁Like ▁all ▁sight ed ▁Ph ac op ina , ▁Psych opy ge ▁has ▁sch iz och ro al ▁eyes , ▁ ▁the ▁front al ▁lo be ▁of ▁the ▁central ▁raised ▁area ▁of ▁the ▁head sh ield ▁( or ▁ce phal on ), ▁called ▁g label la ▁is ▁expanded ▁forward , ▁la cks ▁a ▁ro str al ▁plate ▁( the ▁mid front al ▁part ▁of ▁the ▁“ se am ” ▁visible ▁from ▁the ▁vent ral ▁side , ▁defined ▁by ▁s ut ures ), ▁and ▁the ▁art ic ulate ▁middle ▁part ▁of ▁the ▁ex os ke leton ▁( or ▁thor ax ) ▁has ▁ 1 1 ▁segments . ▁Like ▁all ▁A ster opy g inae , ▁Psych opy ge ▁has ▁( in ▁this ▁case ▁ 5 ▁pairs ) ▁prominent ▁sp ines ▁( or ▁la ppets ) ▁extending ▁from ▁the ▁segments ▁of ▁the ▁tail sh ield ▁( or ▁pyg id ium ) ▁in ▁the ▁area ▁outside ▁the ▁axis ▁( or ▁ple ural ▁region ). ▁The ▁front al ▁lo be ▁of ▁the ▁g label la ▁is ▁rounded , ▁the ▁border ▁car ries ▁a ▁long ▁flat ▁sword - sh aped ▁forward ▁pointing ▁extension . ▁The ▁fur rows ▁div iding ▁the ▁front al ▁lo be ▁of ▁the ▁g label la ▁is ▁cur ved