Moscow. 23 Seputembala. INTERFAX.RU - Kuunika kwa mabwinja omwe akupezeka kumpoto kwa dziko la US ku Alaska mdera la Colville River alola akatswiri a zamwala kunena kuti apeza mtundu wa ma dinosaurs omwe kale anali asayansi, inatero nyuzipepala ya Britain ku The Guardian Lachitatu.
M'nkhani yomwe idasindikiza Lachiwiri mu buku la Acta Palaeontologica Polonica, akatswiri asayansi aku University of Alaska ndi University of Florida adanenanso kuti zinali zokhudzana ndi mtundu wina wa hadrosaurs. Ma "dinosaurs oyeserera oyamwa" omwe amakhala kumpoto kwa Alaska. Mitunduyi ndi yosiyana kwambiri ndi zotsalira za banja lomwelo, zomwe kale zidapezeka ku Canada komanso gawo lalikulu la USA.
Ofufuzawo adatcha mtundu watsopano, Ugrunaaluk kuukpikensis, womwe mchilankhulo cha Inupiat, anthu omwe amakhala pafupi ndi omwe apezako, amatanthauza "herbivore yakale." Ili ndi mtundu wachinayi wa ma dinosaur wodziwika ndi sayansi, womwe umangokhala kumpoto kwa Alaska. Ambiri mwa zitsanzo zomwe zapezeka anali achichepere mpaka mita 2.7 kutalika mpaka 90cm. Nthawi yomweyo, ma Hadrosaurs amtunduwu amatha kukula mpaka 9 metres. Mazana a mano pakamwa pawo adawalola kutafuna kudya zakudya zolimba. Zimayenda makamaka kumiyendo yakumbuyo, koma ngati kunali kotheka, zimatha kugwiritsa ntchito miyendo yonse inayi. Monga a D Dickenmiller aku University of Alaska ananena, "gulu la achichepere linaphedwa mwadzidzidzi komanso nthawi yomweyo." Poyamba, zotsalira zimadziwika kuti ndi edmontosaurs, komabe, kafukufuku wamtsogolo adawonetsa kuti asayansi apeza mtundu watsopano.
Malinga ndi The Guardian, izi zikugwirizana ndi chiphunzitso chakuti ma dinosaurs omwe adakhala zaka pafupifupi 70 miliyoni zapitazo kumapeto kwa Cretaceous amatha kusintha kutentha. Monga a Gregory Ericksen, pulofesa wa biology ku University of Florida, adanena, "panali dziko lonse lapansi lomwe sitimadziwa." Ma hadrosaurs akumpoto amatha kukhala miyezi yambiri kutentha kochepa komanso, mwina, ngakhale nyengo za chipale chofewa. Komabe, monga Eriksen adanenera, "izi sizomwe zilipo masiku ano ku Arctic yamakono.
Kuphatikiza apo, asayansi akukonzekera kuti adziwe momwe owonetsa hadrosaurs adakhalira munthawi imeneyi. Monga woyang'anira wamkulu wa Museum ya Zachilengedwe ku America, a Mark Norrell, adauza The Guardian kuti, mwina, oyendetsa mabungwe a kumpoto adatsogolera moyo wofanana ndi zamakono zamakono a musk ng'ombe ndi Canada deiban caribou. Sizokayikitsa kuti ma dinosaurs amatha kusuntha kwa nthawi yayitali, katswiri wa paleontologist adatero.
Zotsalira za mtundu watsopano, monga ma dinosaurs ambiri opezeka ku Alaska, adapezeka m'malo osungirako miyala ya Liskomb, 480 km kumpoto chakumadzulo kwa tawuni yapafupi kwambiri ya Fairbanks ndi 160 km kumwera kwa Arctic Ocean. Dangali limatchulidwa pambuyo pa katswiri wofufuza za chilengedwe Robert Liskomb, yemwe mu 1961, akufufuza za Shell, anapeza mafupa oyamba ku Alaska. Komabe, ankakhulupirira kuti mafupawa ndi a nyama zomwe zimayamwa. Patangotha zaka 20 zokha, mafupawo adadziwika kuti ndi mafupa a dinosaur.
