Neognathae suav nrog feem ntau ntawm cov noog nyob; qhov kev zam yog lub tinamous thiab lub flyless ratites, uas yog hloov mus rau tus muam taxon Palaeognathae. … Lawv txawv ntawm palaeognathae hauv cov yam ntxwv zoo li cov qauv ntawm lawv lub puab tsaig.
Neognaths thiab Palaeognaths txawv li cas?
Nyob rau hauv neognaths, lub quadrate thiab lateral bar tseem nyob twj ywm, thaum nyob rau hauv palaeognaths tsuas yog lub quadrate tseem nyob. Daim duab peb sab thiab kab qhia yoog raws thaj chaw nyob rau sab saudFeem ntau neognaths muaj ib lub qhov ntswg-frontal pob khawm ntawm lub hauv paus ntawm pob txha taub hau; palaeognaths muaj thaj chaw hloov tau ntev nyob rau sab saud.
Thaum twg Palaeognathae tawg ntawm Neognathae?
Qhov sib txawv ntawm Palaeognathae thiab Neognathae yog 110.0 lab xyoo dhau los (mya) (95% kev ntseeg siab ncua sijhawm [CI]: 104.7–115.5 mya), uas nyob nruab nrab ntawm cov noog. thiab lwm yam paleognaths yog 79.6 mya (95% CI: 76.5–82.6), thiab cov kab tseem ceeb ntawm Palaeog- nathae tau sib txawv ntawm 70.6–62.0 mya.
Dab tsi yog qee yam yam ntxwv ntawm paleognaths?
Feem ntau cov paleognaths muaj ntev caj dab thiab ceg ntev thiab tshwj xeeb rau kev khiav es tsis txhob yaTxhua yam tab sis cov tinamous yog flightless. Paleognaths, uas tsis yog tinamous, feem ntau hu ua ratites (los ntawm lo lus Latin rau raft: ratis) vim tias lawv muaj pob txha caj dab zoo li lub nkoj.
Puas yog penguins neognaths?
Thawj zaug tshwm sim hauv cov ntaub ntawv fossil nyob rau hauv Lig Cretaceous, txog 70 lab xyoo dhau los, cov noog neognath muaj xws li cov noog ua luam dej thiab dhia dej xws li penguins, mus rau kev ua haujlwm siab zoo xws li petrels thiab albatrosses, rau cov tswv ntawm lub zog tsav. xws li swifts thiab hummingbirds.
