EMoscow. NgoFebhuwari 11. I-INTERFAX.RU - Ososayensi baseCanada abavela eRoyal Tyrrell Paleontological Museum bathole uhlobo olusha lwe-dinosaur ye-carnivorous, ebizwa ngokuthi "Umvuni Wokufa".
"Lokhu ngumbusi wokuqala owatholakala eCanada eminyakeni engama-50," kusho umbiko we-blog Museum. I-Death Reaper, etholakala esifundazweni saseCanada e-Alberta entshonalanga yezwe, ihlukile kwamanye ama-tyrannosaurs asezimpawu eziningi zogebhezi, kodwa okuphawuleka kakhulu yizigobongo eziqonde ngqo ezihamba lonke ubude bomhlathi ongenhla, kusho umlobi ophambili walolu cwaningo, uJared Voris.
Uhlobo olusha lwe-tyrannosaurus luneminyaka engama-2,5 yezigidi ubudala kunesihlobo salo esiseduze kakhulu, futhi luneminyaka eyisigidi ezingama-79,5. Kwaziwa kuphela ama-dinosaurs amane ase-Alberta: ama-daspletosaurs, ama-gorgosaurs, ama-albertosaurs kanye nama-tyrannosaurs. Iningi lazo lineminyaka eyizigidi ezingama-66-77 ubudala. Ngasikhathi sinye, kubizwa ngama-dinosaurs amabili kuphela ase-Alberta kusukela kumjikelezo wempilo we- "Reaper Refer": idayin ekhanda lesigqoko (Colepiocephale) nesidina esinezimpondo (I-Xenoceratops).
Igama le-tyrannosaurus entsha yi Thanatotheristes degrootorum - ukhuluma ngendima yakhe phezulu kwephakethe lokudla, futhi waphefumulelwa, ikakhulukazi, ngegama likankulunkulu wamaGrikhi wokufa - Thanatos, lapho kwongezwa khona igama elithi theristes - umvuni. Futhi ingxenye yesibili yegama yanikezwa idayinaso elisha ukuhlonipha uJohn De Groot owathola umhlathi wakhe. UDe Groot ungumlimi futhi uthanda i-paleontology, kusho lo mbiko. Wathola umhlathi, okwathi, ungowesidina ngesikhathi sohambo lokuhamba ngezinyawo eningizimu ye-Alberta.
"Imihlathi ibiyinto emangalisayo etholakele. Besazi ukuthi kutholakala into ebalulekile ngoba amazinyo ezinsalela ayebonakala kahle," kuphawula uDe Groot.
Unkosikazi wakhe, uSandra De Groot, uthe umyeni wakhe ubekholwa njalo ukuthi uzothola isikhova sedayinaso, kepha "ngenxa yokutholwa kwalokho, kwatholakala uhlobo olusha lwedayinaso, ngaphandle nje kwemikhawulo eqanjiwe."
UFrancois Terien, umgcini womnyango we-dinosaur paleoecology eRoyal Tyrrell Paleontological Museum, ugcizelela ukuthi "lokhu okutholakele kubaluleke kakhulu ngoba kugcwalisa igebe ekuqondeni kwethu ekudalekeni kobushiqela." I-Reaper of Death inikeza ukuqonda ngesihlahla sozalo sabaphikisi futhi sibonisa ukuthi abobushiqela besikhathi seCretaceous sase-Alberta behluka kakhulu kunalokho obekucatshangwa ngaphambili, kusho umnyuziyamu.
Imnandi ebulalayo
Izazi ze-paleontologists zaseChina zabika ukuthi zembula imakomidi ngaphakathi kwe-cartilage ye-dinosaur ebunjiwe efana ne-nucleus nama-chromosomes amaseli. Ososayensi baphakamise ukuthi ngaphakathi kwerekhodi lokugcina komhlaba kukhona amaseli e-chondrocyte agcinwe kahle. Imiphumela yokuhlaziya ikhombisile ukuthi izingxenye ze-matrix ezingaphandle kwe-cartilage, kufaka phakathi i-glycosaminoglycans nohlobo II collagen, nazo zigcinwe. Uchungechunge lwezivivinyo luqinisekisile ukuthi kungenzeka kube khona kwe-DNA emafosili: amamaki abopha ngokuqondile amasampula wofuzo ahlanzekile. Kodwa-ke, ababhali bayavuma ukuthi kungenzeka kungcoliswe okubalulekile, yize bekubheka njengokungeke kwenzeke.
Kodwa-ke, abanye ochwepheshe bakholelwa ukuthi amasampula asengangcoliswa. U-Evan Saitta we-Field Museum of Natural History eChicago ukholelwa ukuthi ukutholwa kozakwabo baseChina kungathinteka ngamaphutha ezibalo kanye nokuba khona kwamagciwane ezintweni ezifundwayo. I-dye propidium iodide (PI) esetshenziswe ocwaningweni ayikwazi ukungena ngaphakathi kolwelwesi, ngakho-ke ukufaka amabala akunakubhekwa njengobufakazi bokuba khona kwe-DNA ngaphakathi kwe-cell nucleus. Ngasikhathi sinye, amathambo ezinsalela acebile kwi-Microscial DNA, engatholakala kusetshenziswa i-PI. Izindlela zomlando eziklanyelwe ukufakazela ubukhona be-cartilage nazo zithambekele ekunikeni imiphumela engemihle.
Kodwa-ke, ababhali balo msebenzi abavumelani nokugxekwa. “Bangasho ukuthi bafunani,” kuphawula osanta uMary Schweitzer wase-University of North Carolina. Ukholelwa ukuthi omaka bakhombise ngokusobala ubukhona be-DNA ngaphakathi kwezakhi zamaselula ezansi kwe-cartilage, ubukhona bayo bufakazelwa yizindlela zomlando nezezifo.