Moscow. 11 ga Fabrairu. INTERFAX.RU - Masana kimiyyar Kanada daga Masarautar Royal Tyrrell Paleontological Museum sun gano sabon nau'in abincin dinosaur, wanda ake kira "Rashin Mutuwa".
"Wannan shi ne azzalumi na farko da aka samo a cikin Kanada a cikin shekaru 50," in ji gidan tarihin gidan kayan gargajiya. Mutuwa mai raɗaɗi, wacce aka samo a lardin Alberta na Kanada a yammacin ƙasar, ya bambanta da sauran azzalumai a cikin halaye masu yawa na kwanyar, amma abin da aka sani shi ne tsayayyun tsaka-tsaki waɗanda ke gudana tare da tsawon tsayin daka sama, in ji marubucin binciken, Jared Voris.
Wani sabon nau'in tyrannosaurus yana da shekaru miliyan 2.5 da suka fi kusanci da dangi na kusa, kuma yana da shekaru miliyan 79.5. Dinosaurs huɗu ne kawai daga Alberta waɗanda aka sani: daspletosaurs, gorgosaurs, albertosaurs da azzalumi. Yawancinsu shekaru miliyan 66-77 ne. A lokaci guda, dinosaur biyu ne kawai daga Alberta da aka sani daga yanayin rayuwa na "Mutuwa mai Sauƙi": dinosaur mai kwalkwaliKarafarini) da dinosaur mai ban tsoro (Xenoceratops).
Sunan sabon mulkin zalunci shine Thanatotheristes degrootorum - yayi magana game da rawar da ya taka a saman sarkar abinci, kuma an yi masa wahayi, musamman, da sunan allahn mutuwa ta Girka - Thanatos, wanda kalmar theristes - aka girka mai mai. Kuma kashi na biyu na sunan an ba shi sabon dinosaur don girmamawa ga John De Groot wanda ya sami muƙamuƙin. De Groot manomi ne kuma mai son ilimin paleontology, in ji rahoton. Ya sami muƙamuƙi, wanda, yayin da ya juya, mallakar dinosaur ne yayin tafiya mai zurfi a Kudancin Alberta.
De jawot ya ce "bakin muƙamin wani abu ne mai ban mamaki. Mun san wannan gagarumin binciken ne saboda haƙoran burbushin bayyane bayyane suke," in ji De Groot.
Matarsa, Sandra De Groot, ta ce a koyaushe mijinta ya yi imanin cewa zai sami kwanyar dinosaur, amma "saboda binciken, an gano wani sabon nau'in dinosaur, kusa da iyakar almara."
Francois Terien, mai lura da sashin binciken ilimin halittar kayan tarihi na gidan kayan tarihi na Royal Tyrrell Paleontological Museum, ya jaddada cewa "wannan binciken yana da matukar muhimmanci saboda yana cike gibin da ke cikin fahimtarmu a cikin cigaban azzalumai." Sakamakon Mutuwa mai Mutuwa ya ba da fahimtar bishiyar asalin mulkin zalunci kuma yana nuna cewa zalunci daga zamanin Alterta ya bambanta fiye da yadda ake tsammani, in ji gidan kayan tarihin.
Jin daɗi
Masana burbushin halittun kasar China sun bayar da rahoton cewa sun bayyanar da cibiyoyin kere-kere a cikin gubar katuwar dinosaur wadanda suke kama da kwayar halitta da kwayar halitta ta sel. Masana kimiyya sun ba da shawarar cewa a cikin bayanan burbushin halittun chondrocyte suna kiyaye su sosai. Sakamakon binciken ya nuna cewa an kiyaye abubuwan haɗin gwal na extracellular matrix, gami da glycosaminoglycans da nau'in collagen II. Jerin gwaje-gwaje da yawa ya tabbatar da yiwuwar kasancewar DNA a cikin burbushin: alamomin da ke alakanta su da kayan kwayar halitta. Koyaya, marubutan sun yarda da yiwuwar gurbata kayan, kodayake suna ganin wannan rashin yiwuwa ne.
Koyaya, wasu masana sunyi imanin cewa har yanzu samfirin na gurbata. Evan Saitta na Gidan Tarihi na Tarihi na Halittar Halittu a Chicago ya yi imanin cewa binciken abokan aikin Sinawa na iya shafar kurakurai na ƙididdiga da kasancewar ƙwararrun ƙwayoyin cuta a kan abubuwan da ake binciken. Dye propidium iodide (PI) da aka yi amfani da shi a cikin binciken ba zai iya shiga cikin membranes tantanin halitta ba, saboda haka baza a iya yin la'akari da kasancewar DNA a cikin kwayar sel. A lokaci guda, kasusuwan burbushin suna da wadatar DNA, wanda za'a iya gano ta amfani da PI. Hanyoyin Histochemical da aka tsara don tabbatar da kasancewar guringuntsi kuma ana iya bayar da sakamako na gaskiya.
Koyaya, marubutan aikin basu yarda da sukar ba. “Suna iya faɗi abin da suke so,” in ji Mary Schweitzer na jami'ar North Carolina. Ta yi imanin cewa alamomi a bayyane sun nuna kasancewar DNA a cikin ginin kwayar halitta a gindin gurnati, wanda hakan ma an tabbatar da shi ta hanyar ilimin tarihi da hanyoyin kariya.
