Kev tshawb nrhiav tshiab tshaj plaws hauv Zigong Dinosaur
Lub cheeb tsam ntawm keeb kwm ntawm cov sauropods tshiab yog tej zaum Asia, thiab cov tsoos "East Asian cais" tsis muaj nyob. Biopalaeogeography tsom xam qhia tau hais tias lub hauv paus chiv keeb ntawm neosauropod dinosaurs, lub lig evolutionary ceg ntawm sauropod dinosaurs, tej zaum yuav Asia thiab North America, thiab lub hauv paus chiv keeb ntawm Macronaria dinosaurs tej zaum yuav Asia thiab North America, thiab lub hnub nyoog yog thaum ntxov Middle Jurassic. Nyob rau tib lub sijhawm, kev txheeb xyuas cov ceg kuj tseem qhia tau tias qhov kev faib tawm ntawm Dashu zaj tsis yog tsuas yog qhov sib txawv ntawm Squatosaurus thaum ntxov, tab sis kuj yog qhov sib txawv ntawm neosauropod dinosaurs. Yog li ntawd, nws tau kwv yees tias thaj chaw keeb kwm ntawm neosauropod dinosaurs zoo li yog Asia.
Txoj kev tshawb no qhia tau hais tias thaum tig ntawm Mid-Late Jurassic (thaum lub sijhawm tawg ntawm Pangea), pawg sauropod loj uas sawv cev los ntawm Neosauropods tuaj yeem ua tiav lawv cov kev faib thoob ntiaj teb, yog li cov tsoos "East Asian cais" tsis muaj nyob. Cov hluav taws xob hauv cheeb tsam thiab thoob ntiaj teb ntawm cov pab pawg sib txawv tej zaum yuav pib thaum ntxov Jurassic thaum ntxov mus rau Middle Jurassic.
Nws paub tias Sauropoda yog cov tsiaj loj tshaj plaws uas tau nyob hauv lub ntiaj teb, thiab nws cov keeb kwm thiab kev hloov pauv thaum ntxov tau nyiam ntau yam.
Raws li cov ntaub ntawv pov thawj uas twb muaj lawm, kev sib txawv, kev sib txawv thiab kev faib tawm ntawm sauropods tau nce sai heev los ntawm lig Thaum Ntxov Jurassic mus rau nruab nrab Jurassic thaum ntxov nrog rau cov hluav taws xob hloov pauv sai ntawm sauropods.
