. ▁ ▁References ▁ ▁Category : 1 8 8 9 ▁birth s ▁Category : 1 9 6 5 ▁death s ▁Category : Dan ish ▁male ▁art istic ▁g ymn asts ▁Category : O lymp ic ▁g ymn asts ▁of ▁Den mark ▁Category : G ymn asts ▁at ▁the ▁ 1 9 0 8 ▁Summer ▁Olympics <0x0A> </s> ▁An is us ▁spir orb is ▁is ▁a ▁species ▁of ▁small ▁fresh water ▁air - bre ath ing ▁sn ail , ▁an ▁aqu atic ▁pul mon ate ▁g ast rop od ▁m oll usk ▁in ▁the ▁family ▁Plan orb idae , ▁the ▁ram ' s ▁horn ▁sn ails . ▁ ▁Tax onomy ▁An is us ▁spir orb is ▁may ▁be ▁a ▁broad - wh or led ▁morph ot ype ▁of ▁An is us ▁le uc ost oma . ▁ ▁Distribution ▁ ▁Europe ▁to ▁Si ber ia . ▁ ▁This ▁species ▁occurs ▁in ▁countries ▁that ▁include : ▁ ▁Czech ▁Republic ▁- ▁vulner able ▁( V U ) ▁ ▁Slov ak ia ▁ ▁Germany ▁- ▁high ▁end anger ed ▁( St ark ▁gef ähr det ) ▁ ▁Poland ▁ ▁Ireland ▁ ▁Great ▁Britain ▁ ▁U z bek istan ▁ ▁Si ber ia ▁ ▁Description ▁The ▁shell ▁is ▁ 1 ▁to ▁ 1 . 5   mm ▁high ▁and ▁measures ▁ 4 ▁to ▁ 5 . 5   mm ▁in ▁diameter . ▁It ▁has ▁approximately ▁ 4 . 5 ▁wh or ls . ▁The ▁mouth ▁is ▁ob lique ▁to ▁the ▁axis ▁of ▁the ▁co il . ▁The ▁wh or