▁is ▁from ▁the ▁Late ▁Dev onian ▁period . ▁ ▁See ▁also ▁▁ ▁S arc opter yg ii ▁ ▁List ▁of ▁s arc opter y gi ans ▁ ▁List ▁of ▁pre histor ic ▁b ony ▁fish ▁ ▁References ▁ ▁Category : Pre histor ic ▁lo be - f inned ▁fish ▁gener a <0x0A> </s> ▁N iels ▁de ▁Lang en ▁( born ▁ 3 0 ▁November ▁ 1 9 9 8 ) ▁is ▁a ▁Dutch ▁para - al pine ▁sk ier . ▁ ▁Early ▁life ▁▁ ▁De ▁Lang en ▁was ▁born ▁in ▁ 1 9 9 8 ▁in ▁Arn hem , ▁Netherlands . ▁In ▁the ▁first ▁year ▁of ▁his ▁life ▁he ▁lost ▁his ▁right ▁leg ▁due ▁to ▁men ing oc oc cal ▁disease . ▁At ▁ 1 6 ▁years ▁of ▁age , ▁in ▁June ▁ 2 0 1 5 , ▁he ▁made ▁the ▁decision ▁to ▁am put ate ▁his ▁left ▁leg ▁which ▁was ▁also ▁dam aged ▁as ▁a ▁result ▁of ▁the ▁in fection . ▁ ▁Career ▁▁ ▁In ▁ 2 0 1 7 ▁he ▁won ▁a ▁bronze ▁medal ▁at ▁the ▁ 2 0 1 7 ▁World ▁Para ▁Al pine ▁Ski ing ▁Championships ▁at ▁the ▁sl alom ▁event . ▁ ▁He ▁represented ▁the ▁Netherlands ▁at ▁the ▁ 2 0 1 8 ▁Winter ▁Par al ym p ics ▁and ▁competed ▁in ▁all ▁five ▁discipl ines : ▁the ▁Men ' s ▁down hill , ▁Men ' s ▁Super - G , ▁Men ' s ▁super ▁combined , ▁Men ' s ▁giant ▁sl alom ▁and ▁Men ' s ▁sl