Asayansi mu mzinda wa Ganzhou, m’chigawo chakum’mwera kwa China cha Jiangxi, atulukira zinthu zina. Iwo anapeza mafupa a dinosaur, amene anakhala pa chisa chake cha mazira othyoledwa.
Dinosaur, yotchedwa oviraptorosaur (oviraptor), ndi mbali ya gulu la mbalame zotchedwa theropod dinosaurs zomwe zinakula mu Cretaceous Period (zaka 145 mpaka 66 miliyoni zapitazo).
Zakale zakale za oviraptor ndi mazira a embryonic adalembedwa zaka pafupifupi 70 miliyoni zapitazo. Aka kanali koyamba kuti ochita kafukufuku apeze kanyama kakang'ono ka mbalame komwe kamagona pamazira ophwanyidwa, omwe mkati mwake muli khandalo!
Zinthu zakale zomwe zikufunsidwa ndi munthu wamkulu wazaka 70 miliyoni wa oviraptorid theropod dinosaur atakhala pamwamba pa chisa cha mazira ake owopsa. Mazira angapo (osachepera atatu omwe ali ndi miluza) amawonekera, monga momwe zilili ndi manja a wamkulu, chiuno, miyendo yakumbuyo, ndi gawo la mchira. (Shandong Bi, Indiana University of Pennsylvania)
Kodi asayansi amanena chiyani pa zimene anapezazi?
Mlembi wamkulu wa kafukufukuyu, Dr. Shundong Bi wa Center for Vertebrate Evolutionary Biology, Institute of Palaeontology, Yunnan University, China, ndi Department of Biology, Indiana University of Pennsylvania, USA, adatero m'mawu atolankhani. “Madaini omwe amasungidwa pa zisa zawo ndi osowa, komanso miluza yakufa. Aka ndi koyamba kuti dinosaur yemwe si wa mbalame apezeke, atakhala pa chisa cha mazira amene amasunga miluza, m’chitsanzo chimodzi chochititsa chidwi kwambiri.”
Ngakhale asayansi awonapo ma oviraptors akuluakulu pa zisa zawo ndi mazira kale, aka ndi nthawi yoyamba kuti miluza ipezeke mkati mwa mazirawo. Wolemba nawo pa kafukufuku wina dzina lake Dr. Lamanna, katswiri wa zinthu zakale wa ku Carnegie Museum of Natural History, USA, akufotokoza kuti: "Kutulukira kwamtunduwu, kwenikweni, khalidwe lopangidwa ndi zinthu zakale zakale, ndilosowa kwambiri mwa ma dinosaur. Ngakhale kuti ma oviraptorids achikulire ochepa anapezekapo pa zisa za mazira awo kale, palibe miluza yomwe yapezekapo m’mazirawo.”
Dr. Xu, wofufuza pa Institute of Vertebrate Paleontology and Paleoanthropology ku Beijing, China, ndi mmodzi mwa olemba kafukufukuyu, akukhulupirira kuti zomwe zapezeka zachilendozi zili ndi zambiri zambiri. "N'zodabwitsa kuganiza kuchuluka kwa zinthu zamoyo zomwe zapezeka m'mabwinja amodzi okhawa." Dr. Xu akuti, "Tikhala tikuphunzira kuchokera pachitsanzochi kwa zaka zambiri zikubwerazi."
Mazira oumbidwa kale anali atatsala pang’ono kuswa!
Asayansiwo adapeza mafupa a munthu wamkulu wa oviraptor okhala ndi miyala m'mimba mwake. Ichi ndi chitsanzo cha gastroliths, "miyala ya m'mimba," chimene cholengedwacho chinadya kuti chizithandiza kugaya chakudya chake. Ndikonso koyamba kwa ma gastroliths osatsutsika omwe adapezeka mu oviraptorid, yomwe asayansi akuwona kuti ingathandize kuwunikira zakudya zama dinosaurs.
M’kaimidwe kokakamira kapena kutetezera, dinosaur anapezedwa atagwada pa chisa cha mazira osachepera 24 opangidwa ndi zinthu zakale. Izi zikusonyeza kuti dinosaur anawonongeka pamene akusakasaka kapena kuteteza ana ake.
Komabe, ofufuzawo atagwiritsa ntchito kusanthula kwa isotopu ya okosijeni pamazirawo, adapeza kuti adakulungidwa pamalo otentha, ngati mbalame, zomwe zimatsimikizira chiphunzitso chakuti wamkuluyo adawonongeka akumanga chisa chake.
Osachepera asanu ndi awiri mwa mazira opangidwa kale anali adakali ndi mazira oviraptorid mkati mwake. Asayansi akukhulupirira kuti mazira ena anali pamphepete mwa kuswa malinga ndi momwe magwerowo anapangidwira. Malinga ndi Dr. Lamanna, "Dinosaur uyu anali kholo lachikondi lomwe pamapeto pake linapereka moyo wake polera ana ake."
