 Since its description in 1825 , Iguanodon has been a feature of worldwide popular culture . Two lifesize reconstructions of Mantellodon ( considered Iguanodon at the time ) built at the Crystal Palace in London in 1852 greatly contributed to the popularity of the genus . Their thumb spikes were mistaken for horns , and they were depicted as elephant @-@ like quadrupeds , yet this was the first time an attempt was made at constructing full @-@ size dinosaur models . In 1910 Heinrich Harder portrayed a group of Iguanodon in the classic German collecting cards about extinct and prehistoric animals " Tiere der Urwelt " . 
 Since its description in 1825 , Iguanodon <a href='uninflect' title='1'><mark>has</mark></a> been a feature of worldwide popular culture . Two lifesize reconstructions of Mantellodon ( considered Iguanodon at the time ) built at the Crystal Palace in London in 1852 greatly contributed to the popularity of the genus . Their thumb spikes <a href='uninflect' title='2'><mark>were</mark></a> mistaken for horns , and they <a href='uninflect' title='3'><mark>were</mark></a> depicted as elephant @-@ like quadrupeds , yet this was the first time an attempt was made at constructing full @-@ size dinosaur models . In 1910 Heinrich Harder portrayed a group of Iguanodon in the classic German collecting cards about extinct and prehistoric animals " Tiere der Urwelt " . 
Since its description in 1825 , Iguanodon have been a feature of worldwide popular culture . Two lifesize reconstructions of Mantellodon ( considered Iguanodon at da time ) built at the Crystal Palace in London in 1852 greatly contributed to tdapopularity of the genus . Their thumb spikes was mistaken fir horns , and they was depicted as elephant @-@ like quadrupeds , yet this was thdairst time an attempt was made at constructing full @-@ size dinosaur models . In 1910 Heinrich Harder portrayed a group of Iguanodon in the classic German collecting cards about extinct and prehistoric animals " Tiere der Urwelt " .