▁forced ▁to ▁step ▁away ▁from ▁her ▁active ▁role ▁in ▁the ▁government , ▁and ▁Ter esa ▁assumed ▁the ▁reg ency ▁until ▁her ▁son ▁achieved ▁his ▁majority . ▁ ▁References ▁ ▁Category : Le on ese ▁queen ▁cons ort s ▁Category : 9 9 7 ▁death s ▁Category : 1 0 th - century ▁women ▁r ul ers ▁Category : Year ▁of ▁birth ▁unknown <0x0A> </s> ▁Est oni ops ▁is ▁a ▁genus ▁of ▁tr il ob ites ▁in ▁the ▁order ▁Ph ac op ida , ▁that ▁existed ▁during ▁the ▁upper ▁Ord ov ician ▁in ▁what ▁is ▁now ▁Est onia . ▁It ▁was ▁described ▁by ▁Mann il ▁in ▁ 1 9 5 8 , ▁and ▁the ▁type ▁species ▁is ▁Est oni ops ▁ex ilis , ▁which ▁was ▁originally ▁described ▁under ▁the ▁genus ▁Ac aste ▁by ▁E ich wald ▁in ▁ 1 8 5 8 . ▁Its ▁generic ▁name ▁is ▁derived ▁from ▁the ▁country ▁in ▁which ▁it ▁was ▁first ▁discovered . ▁ ▁References ▁ ▁External ▁links ▁ ▁Est oni ops ▁at ▁the ▁Pale obi ology ▁Database ▁ ▁Category : F oss il ▁tax a ▁described ▁in ▁ 1 9 5 8 ▁Category : Ord ov ician ▁tr il ob ites ▁Category : F oss ils ▁of ▁Est onia ▁Category : P ter yg omet op idae ▁Category : Ph ac op ida ▁gener a <0x0A> </s> ▁The ▁Comp act ▁Oxford ▁English ▁Dictionary ▁may ▁refer ▁to ▁either ▁of ▁two ▁books ▁published ▁by ▁Oxford ▁University ▁Press : ▁ ▁The ▁Comp act ▁Ed itions ▁of ▁the ▁Oxford ▁English ▁Dictionary ,