Mushure mekuwana mazino eIguanodon, mudzimai waGideon Mantell, Mary Ann, akawana mazino ekutanga eIguanodon mumatanda eTilgate Forest muWhitemans Green, Cuckfield, Sussex, England, muna 1822 murume wake achishanyira murwere. Zvisinei, hapana humbowo hwekuti Mantell akatora mudzimai wake pamwe naye achiona varwere. Uyezve, akabvuma muna 1851 kuti iye pachake akawana mazino, kunyangwe akambotaura muna 1827 kuti Mai Mantell vakawana mazino ekutanga akazotumidzwa kuti Iguanodon. Vamwe vanyori vakazotevera vanobvumirana kuti nyaya yacho haisi yenhema. Zvinozivikanwa kubva mumabhuku ake ekuyeuchidza kuti Mantell akatanga kuwana mapfupa makuru kubva kuGreen quarry muna 1820.
Iguanodon