Tus hlob tshaj plaws paub dinosaurs, los ntawm nruab nrab Triassic ntawm South America, yog saurischians. Cov noog uas muaj sia nyob muaj cov poj koob yawm txwv nyob ntawm kab mob theropod.
Sarischian dinosaurs puas ploj lawm?
Cov tsiaj no tau tuag nyob rau lub sijhawm Jurassic Thaum Ntxov(206 lab txog 180 lab xyoo dhau los), tab sis lawv tshwm sim tau nce mus rau qhov loj thiab tshwj xeeb sauropods, uas tseem nyob ib leeg ntawm pawg dinosaur tseem ceeb mus txog thaum kawg ntawm Cretaceous Lub Sijhawm 65 lab xyoo dhau los.
Puas yog tag nrho cov saurischians ploj mus?
Thaum kawg ntawm Cretaceous Lub Sijhawm, tag nrho cov saurischians tsuas yog cov noog tau ploj mus thaum lub sijhawm Cretaceous–Paleogene extinction event.
Yog sauropods saurischians?
Ob pawg sib txawv yog ib txwm muaj nyob rau hauv saurischians - Sauropodomorpha (herbivorous sauropods thiab prosauropods) thiab Theropoda (carnivorous dinosaurs). Cov pab pawg no tau muab tso ua ke los ntawm kev sib koom ua ke ntawm cov yam ntxwv uas lawv qhia tshwj xeeb.
Dab tsi yog qhov txawv ntawm ornithischians thiab saurischians?
Saurischians thiab ornithischians yog ob pawg ntawm dinosaur, txhais raws li cov qauv ntawm lub plab. Saurischians, uas nws lub npe txhais tau tias "lizard-hipped," muaj lub cev pob txha zoo ib yam li cov lizards niaj hnub no, thaum cov ornithischians ("noog-hipped") muaj lub cev pob txha zoo li niaj hnub no.noog.
