Moscow. 23 Satumba. INTERFAX.RU - Binciken ragowar da aka samu a arewacin jihar Alaska ta Amurka a yankin Colville River ya ba da izinin masana binciken dabbobi su ce sun gano wani nau'in dinosaur da ba'a san ilimin kimiyya ba, jaridar The Guardian ta ruwaito a ranar Laraba.

A cikin wata kasida da aka buga ranar Talata a cikin rubutaccen nazarin kundin tarihi na Acta Palaeontologica Polonica, masana kimiyya daga Jami'ar Alaska da Jami'ar Florida sun ba da rahoton cewa kusan game da gano ɗayan nau'in hadrosaurs ne. Wadannan "dinosaur na biya kudin ruwa" suna zaune a arewacin Alaska. Jinsunan sun sha bamban sosai da ragowar dangi guda, wanda a baya aka samo su a Kanada da kuma babban ɓangare na Amurka.

Masu binciken sun ba da suna da wani sabon nau'in, Ugrunaaluk kuukpikensis, wanda a cikin yaren Inupiat, mutane da ke zaune kusa da wurin binciken, yana nufin "tsohuwar herbivore." Wannan shine nau'in dinosaur na huɗu da aka sani da ilimin kimiyya, wanda ke da haƙiƙa kawai na arewacin Alaska. Yawancin samfuran da aka samo su matasa ne masu tsayin mita 2.7 kuma tsayi zuwa santimita 90. A lokaci guda, hadrosaur na wannan nau'in zasu iya yin girma zuwa mita 9 a tsayi. Undredaruruwan haƙora a bakinsu ya basu damar cin abinci a abinci mai wuya. Yawancinsu sun motsa a kan wata gabar mahaifa ne, amma idan ya cancanta, zasu iya amfani da duk gabar hudu. Kamar yadda Pat Druckenmiller na Jami'ar Alaska ya lura, "garken matasa sun yi ba zato ba tsammani kuma a lokaci guda aka kashe." A farko dai, an danganta ragowar ne ga edmontosaurs, amma, binciken sashin gaba ya nuna cewa masana kimiyya sun gano sabon nau'in halitta.

A cewar The Guardian, wannan binciken yana dacewa da ka'idar cewa dinosaurs da suka rayu shekaru miliyan 70 da suka gabata a ƙarshen Cretaceous na iya dacewa da yanayin zafi. Kamar yadda Gregory Ericksen, farfesa a fannin nazarin halittu a Jami'ar Florida, ya ce, "akwai duniyar da ba mu da sani game da ita." Arerosaur na arewa na iya rayuwa tsawon watanni a yanayin zafi kaɗan kuma, maiyuwa, har ma a cikin yanayin dusar ƙanƙara. Koyaya, kamar yadda Eriksen ya fada, "waɗannan ba yanayin da ake ciki bane yanzu a cikin Arctic na zamani. Matsakaicin yawan zafin jiki na shekara-shekara shine digiri 5 zuwa 9 sama da sifilin Celsius."

Bayan haka, masana kimiyyar suna shirin gano ainihin yadda hasrosaur din suka rayu karkashin wadannan yanayin. Kamar yadda mai kula da gidan tarihin gargajiya na Amurka, Mark Norrell, ya fada wa The Guardian, wataƙila, dinosaurs na arewa sun jagoranci rayuwa irin ta shanu ta zamani da sikirin caribou na Kanada. Babu makawa cewa dinosaur din na da ikon yin doguwar ƙaura, in ji masanin ilimin burbushin halittu.

Ragowar sabon nau'in halitta, kamar yawancin dinosaurs a Alaska, an samo su a cikin ɓarnar burbushin Liskomb, 480 kilomita arewa maso yamma na gari mafi kusa da Fairbanks da kuma kilomita 160 kudu da tekun Arctic. An ba da sunan wannan lakabin ne bayan masanin kimiyyar ƙasa Robert Liskomb, wanda, a cikin 1961, yayin da yake gudanar da bincike don kamfanin Shell, ya samo ƙasusuwa na farko a Alaska. Koyaya, ya yi imani cewa wadannan kasusuwa mallakar dabbobi masu shayarwa ne. Shekaru biyu kawai bayan haka, an gano wadannan kasusuwa a matsayin kasusuwa na dinosaur.