Fossil cov ntaub ntawv qhia tias cov noog niaj hnub no pib 60 lab xyoo dhau los, tom qab kawg ntawm Cretaceous lub sijhawm txog 65 lab xyoo dhau los thaum dinosaurs tuag lawm. Tab sis cov kev tshawb fawb molecular qhia tias kev sib txawv ntawm cov noob caj noob ces ntawm ntau kab ntawm cov noog tau tshwm sim thaum lub sij hawm Cretaceous.
Lub sijhawm twg cov noog tau hloov zuj zus los ntawm saurischian dinosaurs?
Cov theropods ntawm Mesozoic Era yog tag nrho ob-legged carnivores, los ntawm cov noog evolved tsawg kawg yog 144 lab xyoo dhau los (Late or Middle Jurassic Period).
Puas muaj noog nyob rau lub sijhawm Jurassic?
Cov evolution ntawm cov noog pib nyob rau lub sijhawm Jurassic, nrog rau earliest noogmuab los ntawm ib lub clade ntawm theropod dinosaurs hu ua Paraves. … Tau ntau tshaj ib puas xyoo, tus me me theropod dinosaur Archeopteryx lithographica los ntawm lub sijhawm Jurassic lig raug suav hais tias yog cov noog ntxov tshaj plaws.
Niam noog thaum twg?
Txhua tus poj koob yawm txwv ntawm txhua tus noog nyob hauv qee lub sijhawm Lub Sij Hawm Cretaceous, thiab nyob rau hauv 65 lab xyoo txij li kev ploj tuag ntawm cov dinosaurs, cov poj koob yawm txwv no muaj ntau haiv neeg mus rau hauv Cov noog tseem muaj sia nyob niaj hnub no.
Thaum twg cov noog ya tau hloov zuj zus?
Pseudosuchian thecodont hypothesis qhia tias cov noog hloov zuj zus kwv yees 230 lab xyoo dhau los (thaum ntxov mus rau nruab nrab lub sijhawm Triassic) los ntawm cov arboreal me methecodonts.
