Anapeza kalambulabwalo wina wa ma dinosaurs

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Akatswiri ofufuza zinthu zakale ku America apeza zotsalira za nyama yachilendo ku Texas, yomwe idakhala chokwawa "chamaso atatu". Nyamayo idakhala zaka 225 miliyoni zapitazo, nthawi ya dinosaur isanayambike.

Poona zidutswa za mafupa zomwe zatsalako, zokwawa pafupifupi sizinasiyane ndi ma "pachting" a pachycephalosaurs, koma nthawi yomweyo zinali ngati ng'ona. Malinga ndi a Michelle Stoker aku Virginia Tech, reptile Triopticus ikuwonetsa kuti kulumikizana pakati pa ma dinosaurs ndi ng'ona kunali kofala kwambiri kuposa momwe amayembekezera. Mwachiwonekere, mawonekedwe apadera, monga amakhulupirira kale, ma dinosaurs okha, sanawonekere m'nthawi ya ma dinosaurs, koma nthawi ya Triassic - pafupifupi zaka 225 miliyoni zapitazo, zomwe ndizoyambirira kwambiri.

Malinga ndi akatswiri ofufuza zakale, nthawi ya Triassic nthawi zambiri inali yosangalatsa kwambiri m'mbiri ya chilengedwe cha dziko lapansi, ngati mungayang'ane kuchokera pakuwona momwe okhala padziko lapansi pano. Mwachitsanzo, panalibe mtsogoleri wowoneka bwino pakati pa nyama zolusa. Ma gorgonops okhala ndi masabato, atsogoleri osatsimikizika a dziko lowononga nthawi ya Paleozoic, adasiyiratu ndi kutha kwakukulu kwa Permian, ndipo magulu osiyanasiyana a ma archosaurs adayamba kumenyera nkhonya, yomwe imaphatikizapo ma dinosaurs ndi ng'ona.

Chitsanzo chabwino cha mpikisanowo titha kuwona ngati ng'ona yayikulu mita atatu Carnufex carolinesis, yomwe imadziwikanso kuti wopha nyama wa Caroline. Nyama iyi, pokhala ng'ona, idasunthabe pamiyendo yake yakumbuyo ngati dinosaur ndipo ndi amene anali pamwamba pa piramidi yazakudya ku North America zaka 220-225 miliyoni zapitazo. Zinkawoneka ngati nyama yodya bipedal dinosaur, monga iguanodon, kuposa ng'ona yamakono.

Nkutheka kuti ng'ona zina zachilendo zidalinso m'gulu la omwe adazunzidwa ndi "crocosaur" uyu - "wamaso atatu" a Triopticus, omwe mafupa awo adapezeka mwangozi muzinthu zofukula zomwe zidasungidwa mwakachetechete mu malo osungira zakale aku America.

Mwakuwoneka, triopticus inali yofanana kwambiri ndi pachycephalosaurus, yomwe inali ndi chigaza chakuda kwambiri. Kukula kotere kwa gawoli, malinga ndi akatswiri ofufuza zinthu zakale, zidapangitsa kuti pachycephalosaurs zithandane pomenyera utsogoleri kapena ufulu wokwatirana. Komabe, ma dinosaurs awa adangowonekera koyambirira kwa nyengo ya Cretaceous, pafupifupi zaka miliyoni miliyoni kuchokera pomwe triopticus idatha.

Komabe, kufanana pakati pa ng'ona "yamaso atatu" ndi pachycephalosaurus sikunangokhala kuwonekera kwawo kokha. Pamene X-ray tomograph idalumikizidwa pamlanduwo, yowunikira chigaza cha Triopticus primus, zidapezeka kuti mafupa ake anali ndi mawonekedwe ofanana ndi a ma dinosaurs, ndipo ubongo, mwina, sunali wofanana ndendende, komanso mawonekedwe ofanana. Zomwe nyama iyi idadya komanso kukula kwake, akatswiri ofufuza zinthu zakale sanadziwebe bwinobwino, popeza nsagwada za "maso atatu" ndi ziwalo zina za thupi lake sizikupezeka. Komabe, ngakhale zomwe zilipo zikuwonetsa kuti chisinthiko sichimasiyanitsa ndipo nthawi zambiri chimasuntha zolengedwa zosiyana mbali imodzi, chifukwa chake nyama zina, zochokera mosiyana, nthawi zina zimakhala ndi mawonekedwe ofanana ndi mawonekedwe amkati.

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Onerani kanemayo: When Dinosaurs Chilled in the Arctic (November 2024).