Gonkoken

Gonkoken ko duckbill 'transitional', maanaa o jokkondirii e hadrosaurids goonga kono wonaa goonga. Baabiraaɓe makko iwri ko North America, ɓe ari South America ko adii duckbills ɓurɗi yaawde.2

Innde Gonkoken iwri ko e ɗemngal Aónik’enk, ɗemngal yimɓe leydi ndii. 'Gon' maanaa 'ko wayi no' e 'koken' maanaa 'gertogal ladde walla swan'.21

Ɓooyɗi Gonkoken keɓaa ko e nokku mo ina waɗi tato neɗɗo. Nokkuure ndee ina wiɗtee haa jooni, ina waawi waɗde heen ɓooyɗi goɗɗi.2

Gonkoken wuuri ko e 71.7 haa 70.5 miliyon duuɓi ko adii, e sahaa Maastrichtian puɗɗo e Late Cretaceous. Oo ko tan ko miliyon duuɓi seeɗa ko adii asteroid mo joofni sahaa dinosaur.2

Ko woni e hadrosaurids goonga, Gonkoken ina joginoo ko ɓuri 30 nokkuuji ñiiɓe e ɓalndu mum les, e ñiiɓe mum ɗee ngonaa ɓurɗe yaawde coronoid process.2

Gonkoken ko dinosaur duck-billed adanɗo siforeede e nokkuure subantarctic. Ɓeydagol mum holli wonde ɓooyɗi hadrosaurid goɗɗi e Antarctica ina mbaawi jeyeede e duckbills ɗi ngonaa hadrosaurid hono Gonkoken.2