Dinosaur qe morphological yam ntxwv

Thawj lub qe dinosaur pom yog cov Protoceratops, uas yog oval nyob rau hauv cov duab, txog 7.5 cm dav thiab 15 cm ntev, thiab muaj txog li 30 ntawm lawv, nrog rau lub qe qhia taw tes rau hauv thiab teem nyob rau hauv ib tug kauv zoo nyob rau hauv lub zes. Dinosaur qe yog cov qe amniotic. Cov qe amniotic yog npog nrog lub plhaub calcium uas muaj zog thiab tiv taus kom qhuav. Muaj ntau qhov me me ntawm lub plhaub. Cov pores no yog "qhov rais" rau lub embryo ua pa thaum lub sij hawm kev loj hlob. Lub qe yog 2 mus rau 7 hli tuab, ua rau nws lub plhaub tuab tshaj plaws hauv ntiaj teb. Nyob rau hauv lub qe, muaj ib tug loj yolk uas muab cov as-ham rau lub embryo. Ib lub hnab amniotic ncig los ntawm amniotic daim nyias nyias yog ntim nrog amniotic kua nyob rau hauv uas lub embryo yog raus. Kuj tseem muaj lub hnab rau khaws cov khoom tawm. Lub qe amniotic muaj cov qauv tsim nyog thiab tsim nyog thiab yuav tsis qhuav los yog poob dej hauv av. Lub embryo muaj kev nyab xeeb thiab xis nyob hauv. Dinosaur qe tuaj nyob rau hauv ntau yam duab, tab sis lawv txoj kab uas hla yog feem ntau ntawm 10 thiab 15 centimeters. Muaj kwv yees li ntau txhiab lub qe dinosaur pom thoob ntiaj teb. Ib tug dinosaur qe fossil nrog ib tug ntev txoj kab uas hla ntawm 30.48 cm thiab ib tug luv luv txoj kab uas hla ntawm 25.4 cm tau pom nyob rau hauv Fabkis. Qhov no yog qhov loj tshaj plaws paub dinosaur qe fossil nyob hauv lub ntiaj teb.
Yam uas tau pom nyob rau lub sijhawm ntawd tsuas yog ob lub qe tawg xwb, thiab nws tseem tsis tau paub meej tias cov tsiaj qe fossil fragments lawv koom nrog dab tsi. Tom qab ntawd, tom qab kawm txog microstructure ntawm lub qe tawg, nws tau pom tias nws cov microstructure zoo ib yam li cov qe vaub kib, yog li nws tau ntseeg tias ob lub qe tawg tawg yog cov tsiaj reptile uas tsis paub. Tsis ntev tom qab ntawd, ntau lub qe tawg thiab qee cov qe pob txha ntawm qhov sib txawv thiab cov duab tau pom nyob rau hauv Cretaceous strata ntawm sab qab teb Fabkis. Lub microstructure ntawm cov qe tawg kuj zoo ib yam li cov qe vaub kib, thiab lawv yuav tsum tau koom nrog cov tsiaj reptiles fossils. . Yog li, hom tsiaj reptiles cov qe fossils yog dab tsi? Vim hais tias txoj kab uas hla ntawm lub qe pob txha nrhiav tau nyob rau lub sij hawm ntawd kuj loj, qee qhov loj dua 20 centimeters nyob rau hauv txoj kab uas hla, ntau loj dua vaub qe qe. Ntawm cov tsiaj reptiles thaum lub sij hawm ntawd, tsuas yog dinosaurs tuaj yeem nteg qe loj, yog li lub qe fossils nrhiav tau hu ua qe dinosaur. Txij thaum ntawd los, qee lub qe dinosaur fossils tau pom nyob rau hauv Cretaceous strata hauv ntau lub tebchaws thoob ntiaj teb. Txij li tus naj npawb ntawm cov qe dinosaur fossils pom thoob ntiaj teb tsis loj (tsis pub ntau tshaj 500), qhov pom yog feem ntau cov calcium plhaub ntawm lub qe. Nws yog qhov tsawg heev los nrhiav cov qe uas muaj qee yam dinosaur embryo fossils. Nws yog ib qho nyuaj rau txiav txim seb hom dinosaur lub qe fossils pom tau tsim los ntawm. Yog li ntawd, rau lub sij hawm ntev, kev tshawb fawb ntawm dinosaur qe fossils tsis ua kom muaj kev vam meej. Dinosaurs yog cov tsiaj oviparous uas hatch los tsim cov tiam tshiab los ntawm fertilization. Yog li ntawd, kev tshawb nrhiav thiab kev tshawb fawb ntawm dinosaur qe fossils yog qhov tseem ceeb ntawm kev tshawb fawb rau kev nthuav tawm cov cwj pwm kev ua me nyuam, kev coj cwj pwm, nyob ib puag ncig thiab ua rau tuag ntawm dinosaurs.
Peb lub teb chaws yog ib lub teb chaws muaj nplua nuj heev reserves ntawm dinosaur qe fossils nyob rau hauv lub ntiaj teb no. Raws li kev tshawb fawb, cov duab ntawm dinosaur qe fossils muaj xws li puag ncig, oval, oval, oblong thiab txiv ntseej duab. Sab nrauv ntawm lub qe yog du los yog dotted.
Cov kws tshawb fawb Fab Kis hais tias lawv tau tshawb pom lub qe dinosaur me tshaj plaws puas tau pom yog tias cov qe noog tsis suav nrog. Vim tias cov kws tshawb fawb xav tias cov noog ua cov dinosaurs nyob, cov qe noog yuav tsum raug suav tias yog cov qe dinosaur. Cov kws tshawb fawb tau hais tias plaub lub qe me me dinosaur tau tso los ntawm tib lub dinosaur, thiab ob ntawm lawv muaj embryos. Cov qe dinosaur no tej zaum qhov loj ntawm goldfinch, los yog me ntsis loj dua. Lub cev ntev ntawm goldfinch feem ntau yog li 11 centimeters.