Dziko la zinthu zakale za m’chilengedwe lakhala likudzaza ndi chisangalalo kuyambira pamene chilengezo cha kutulukira kwa chigaza cha dinosaur chazaka 95 miliyoni zakubadwa ku Winton, Queensland, Australia. Chigazacho chadziwika kuti ndi cha a sauropod, gulu la madinosaur aakulu, okhala ndi makosi aatali amene poyamba anali kuyendayenda padziko lapansi. Chochititsa chidwi kwambiri n'chakuti ndi chigaza choyamba cha chigaza chamtundu uliwonse ku Australia. Kutulukiraku kumapereka zidziwitso zatsopano za kusinthika kwa zolengedwa zazikuluzikuluzi ndipo zitha kuthandiza ofufuza kumvetsetsa momwe zimakhalira komanso momwe zimakhalira ndi chilengedwe chawo.
Chigaza chodabwitsacho chinali cha cholengedwa chomwe asayansi adachitcha "Ann": membala wa zamoyo. 'Diamantinasaurus matildae' zomwe zikuwonetsa kufanana kodabwitsa kwa zokwiriridwa zakale zomwe zapezeka pakati pa dziko lonse lapansi, zomwe zimalimbikitsa chiphunzitso chakuti ma dinosaur nthawi ina ankayendayenda pakati pa Australia ndi South America kudzera kumtunda wa Antarctic.
Zodziwika mu June 2018, sauropod Ann - anakhala zaka 95m ndi 98m zapitazo - ndi chitsanzo chachinayi cha mitundu yake yomwe idapezekapo. Diamantinasaurus matildae anali titanosaur, mtundu wa sauropod umene unaphatikizapo nyama zapamtunda zazikulu kwambiri m'mbiri yakale. Kutulukira kwa chigaza chochititsa chidwi chimenechi kwathandiza asayansi kwa nthawi yoyamba kulenganso mmene nkhope ya dinosaur imaonekera.
Chigaza pafupifupi chathunthu cha Diamantinasaurus matildae - woyamba kupezeka ku Australia - amadziwika kuti ali ndi mitu yaying'ono, khosi lalitali ndi michira, matupi ngati mbiya, ndi miyendo inayi.
Ann ayenera kuti ankatalika mamita 15 kufika ku 16 kuchokera kumutu mpaka kumchira. Kukula kwakukulu kwa Diamantinasaurus ndi pafupifupi mamita 20 kutalika, 3 mpaka 3.5 mamita pamwamba pa mapewa, ndi kulemera kwa matani 23 mpaka 25. "Malinga ndi momwe ma sauropods amapita, ndi apakati, aakulu kwambiri (ma sauropods) amakankhira mamita 40 m'litali ndi matani 80," adatero wofufuza wamkulu, Dr. Stephen Poropat wa yunivesite ya Curtin.
Malinga ndi ofufuzawo, "Mafupa a chigazacho adapezeka mozungulira mamita awiri pansi pa nthaka, atabalalika kudera la pafupifupi masikweya mita asanu ndi anayi. Mbali yaikulu ya kumanja kwa nkhope ikusowa, koma zambiri za kumanzere zilipo. Chomvetsa chisoni n’chakuti mafupa ambiri amasonyeza zizindikiro zokhotakhota (mwinamwake chifukwa cha kufufuzidwa kwa mutu pambuyo pa imfa kapena kupondedwa), zimene zimapangitsa kulumikizika kwa chigazacho kukhala chinthu chosavuta.”
Chigaza cha Diamantinasaurus chinapezedwa panthawi ya kukumba mu 2018 ndi Australian Age of Dinosaurs Museum, koma sichinafotokozedwe mpaka 2023. zovuta kuziyika zomwe anali," adatero Poropat. Mel O'Brien, wogwira ntchito mongodzipereka, ndiye adapeza "fupa lowoneka modabwitsa lomwe pamapeto pake tidazindikira kuti liyenera kukhala vuto laubongo. Izi zidapangitsa kuti zitsulo zina zonse zigwere - tidazindikira kuti tili ndi chigaza chomwe chidaphulika ndipo ming'aluyo idabalalika kuzungulira mafupa akumbuyo."
Kutulukira kumeneku kwapereka chithunzithunzi chachilendo cha nyama yachibadwa yodutsa mu Antarctica yotentha. Kuwunika kwa chigazachi kwapeza njira ya dinosaur pakati pa South America ndi Australia kudzera ku Antarctica pakati pa zaka 100 ndi 95 miliyoni zapitazo, kafukufuku yemwe adatulutsidwa pa Epulo 2023 adawulula.
"Zenera pakati pa zaka 100 ndi 95 miliyoni zapitazo linali lotentha kwambiri m'mbiri yaposachedwapa ya geologically, kutanthauza kuti Antarctica, yomwe inali yocheperapo kumene ili tsopano, inalibe ayezi," adatero Stephen Poropat.
Phunziroli lidafalitsidwa mu mtolankhani Royal Society Open Science. Epulo 12, 2023.
