Qhov sib txawv tseem ceeb ntawm ammonite thiab nautilus yog tias ammonite yog marine mollusc ntawm subclass Ammonoidea, uas tau ploj mus, thaum nautilus yog marine mollusc ntawm subclass Nautiloidea, uas yog hom muaj sia nyob.
Class Cephalopoda suav nrog tsuas yog cov tsiaj hauv hiav txwv nrog ob sab symmetry. Cov molluscs no yog cov siab heev thiab koom ua ke. Cephalopods yog qhov loj tshaj plaws ntawm tag nrho cov molluscs. Ammonoidea thiab Nautiloidea yog ob pawg ntawm pawg Cephalopoda. Ammonoidea suav nrog cov ammonite uas ploj lawm, thaum Nautiloidea suav nrog cov tsiaj uas muaj sia nyob. Ammonite thiab nautilus yog ob hom marine molluscs. Lawv muaj spiral chambered shells. Ammonites yog cov thawj ntawm Nautilus. Ammonites tshwm sim nyob rau hauv lub sij hawm Devonian, thaum nautilus tshwm nyob rau hauv lub lig Cambrian.
Ammonite yog dab tsi?
Ammonite yog ib tug tswv cuab ntawm subclass Ammonoidea. Nws yog ib tug uas ploj lawm marine mollusc. Ammonites tshwm sim nyob rau hauv lub sij hawm Devonian. Ammonites thiab nautilus zoo sib xws. Lawv muaj ib tug kauv, chambered plhaub. Lawv tuaj yeem thim lawv lub cev hauv lub plhaub kom tiv thaiv.
Daim duab 01: Ammonite (digitally tsim duab)
Nyob hauv ammonites, lub siphuncle khiav raws ntug sab nrauv ntawm lub plhaub. Lub plhaub no muaj 26 chav. Lawv muaj complex septa uas tau convoluted los yog wrinkled. Cov xim ntawm cov plhaub tsis paub vim tias lawv pom zoo li pob txha. Yog vim li cas tom qab lub extinction ntawm ammonites tseem nyob rau hauv kev sib cav. Cov laj thawj tseem ceeb tuaj yeem yog lawv qhov txwv tsis pub faib khoom, ntau cov kua qaub los nag poob rau hauv hiav txwv thiab lub teeb ci.
Nautilus yog dab tsi?
Nautilus yog ib tug tswv cuab ntawm subclass nautiloidea ntawm Cephalopoda. Nws yog marine mosllusc zoo ib yam li ammonite. Subclass Nautiloidea suav nrog cov tsiaj uas muaj nyob hauv molluscs, tshwj xeeb tshaj yog ob hom ntawm rau nautilus hom. Zoo ib yam li ammonites, hom nautilus muaj lub plhaub coiled chambered. Txawm li cas los xij, lawv lub plhaub yog du thiab muaj 30 chav. Lub septa yog qhov yooj yim thiab du nkhaus.
Daim duab 02: Nautilus
Ntxiv mus, tsis zoo li hauv ammonites, lub siphuncle ntawm nautiloids khiav los ntawm qhov chaw ntawm lub plhaub. Nautilus tau tshwm sim hauv Lub Caij Nplooj Hlav Cambrian. Extinct ammonites yog cov txheeb ze ntawm nautiloids.
Dab tsi zoo sib xws ntawm Ammonite thiab Nautilus?
- Lawv yog cov kab mob zoo sib xws uas koom nrog lub nceeg vaj Animalia, phylum Mollusca thiab chav Cephalopoda.
- Ammonite thiab nautilus yog marine molluscs.
- Lawv yog tsiaj pelagic.
- Ammonites yog thawj thawj ntawm cov nautiluses nyob.
- Lawv muaj coiled chambered plhaub.
- Ob leeg ntseeg tias yog cov tsiaj txhu noj ntau yam tsiaj tuag.
Qhov txawv ntawm Ammonite thiab Nautilus yog dab tsi?
Ammonite yog ib tug tswv cuab ntawm subclass Ammonoidea ntawm chav kawm Cephalopoda, uas yog ib tug uas ploj lawm marine mollusc. Ntawm qhov tod tes, nautilus yog ib tug tswv cuab ntawm subclass Nautiloidea ntawm chav kawm Cephalopoda, uas yog ib tug marine mollusc. Yog li, qhov no yog qhov sib txawv tseem ceeb ntawm ammonite thiab nautilus. Tsis tas li ntawd, ammonites tshwm sim nyob rau hauv lub sij hawm Devonian thaum nautilus tshwm nyob rau hauv lub lig Cambrian.
Ntxiv mus, lwm qhov sib txawv tseem ceeb ntawm ammonite thiab nautilus yog qhov siphuncle khiav raws ntug sab nrauv ntawm lub plhaub hauv ammonites thaum lub siphuncle khiav ncaj qha los ntawm qhov chaw ntawm lub plhaub hauv nautilus. Tsis tas li ntawd, septa yog complex hauv ammonites thaum septa yog yooj yim hauv nautilus.
Cov hauv qab no infographic teev qhov sib txawv ntawm ammonite thiab nautilus hauv daim ntawv tabular rau ib sab ntawm kev sib piv.
Summary – Ammonite vs Nautilus
Ammonite thiab nautilus yog ob-chambered shelled molluscs. Lawv yog cov tsiaj txhu hauv hiav txwv uas tsis muaj pob txha. Lawv nyob rau hauv chav kawm ntawm Cephalopoda ntawm lub nceeg vaj Animalia. Ammonite thiab nautilus yog ze ze rau marine molluscs. Ammonite yog ib qho mollusc uas ploj lawm, thaum nautilus yog ib qho mollusc uas tseem tshuav. Lub siphuncle khiav ncig nws lub plhaub sab nrauv los ntawm ntug ntawm txhua lub septum hauv ammonites. Nyob rau hauv sib piv, lub siphuncle khiav los ntawm qhov chaw ntawm lub plhaub nyob rau hauv nautilus. Lub septa yog yooj yim hauv nautilus, thaum lub septa yog complex hauv ammonites. Yog li, qhov no qhia txog qhov sib txawv ntawm ammonite thiab nautilus.
