Legless Amphibians vs nab
Lawv ob leeg zoo ib yam thiab misidentifies li nab. Ntau tus neeg ntshai nab thiab tua lawv, thiab qee zaum suav nrog caecilians thiab. Yog li ntawd, nws yog ib qho tseem ceeb heev uas yuav tsum sib txawv ib tug nab los ntawm legless amphibians. Kab lus no npaj siab hais txog qhov txawv ntawm nab thiab legless amphibians.
Legless Amphibians
Legless amphibians belongs rau Order: Gymnophiona. Caecilian yog lwm lub npe hu rau lawv. Muaj ntau tshaj 180 hom ntawm cov uas tau muab faib nyob rau hauv lub tropics ntawm South thiab Southeast Asia, Africa, thiab South America. Caecilians tsis muaj ceg tawv thiab feem ntau yog xim daj nrog kab txaij daj nyob rau sab ventral ntawm lub cev. Lawv txawv ntawm lawv qhov loj me los ntawm cov kab me me mus rau ntau dua 1.5 meters ntev. Lawv muaj cov tawv nqaij du thiab moist. Txawm hais tias tsis muaj cov nplai zoo li cov nab, cov calcite nplai muaj nyob hauv qab ntawm daim tawv nqaij. Cov tawv nqaij muaj ib qho segmented tsos vim lub nplhaib-zoo li lub voj voog hu ua annuli. Caecilians nyob hauv cov av sib xyaw ntawm qhov chaw ntub dej lossis qhov chaw ntub dej ze ntawm cov kwj dej lossis pas dej. Lawv feem ntau tsis tshua muaj fossorial thiab pob txha taub hau muaj zog, los pab ua tunnels los ntawm av. Tsis tas li ntawd, daim tawv nqaij npog lub qhov muag, uas yog ib qho kev yoog rau lub neej fossorial. Txawm li cas los xij, lawv tsis muaj qhov muag pom zoo. Caecilians feem ntau yog cov kab thiab kab hauv av. Cov kws tshawb fawb tau tshawb pom cov khoom cog los ntawm lawv cov khoom noj khoom haus, tab sis lawv ntseeg tias cov no yog los ntawm cov tsiaj nyeg. Txawm li cas los xij, muaj kev paub tsawg heev ntawm legless amphibian noj thiab kev zom zaub mov. Raws li amphibians, lawv cov khoom excretory feem ntau yog ammonia. Lawv lub neej ntev li ntawm tsib mus rau nees nkaum xyoo. Qhov no yog ib pab tsiaj ntawm qee qhov kev txaus siab thiab qhov tseem ceeb, tab sis kev xav ntawm tib neeg tsawg heev rau lawv.
Nug
Lawv yog cov tsiaj reptiles tsis muaj ceg, thiab hloov zuj zus los ntawm cov tsiaj reptilian tetrapods ua ntej 110 lab xyoo. Muaj ntau ntau hom kev sau se nrog 2,900 hom. Tsuas yog Antarctica, nab yog ib txwm nyob rau yuav luag txhua lub tebchaws. Snakes tsis muaj ceg tawv, tab sis cov ceg tawv ntawm cov ceg ntoo muaj nyob hauv cov pythons, qhia tias lawv yog thawj qhov kev hloov pauv li nab. Lub cev ntev ntawm nab sib txawv nyob rau hauv ntau yam, pib ntawm 10-centimeter ntev xov nab, mus txog 8-meter ntev anaconda. Cov nplai ntawm daim tawv nqaij npog tag nrho lub cev. Tsis tas li ntawd, cov nplai no muaj xim zoo nkauj thiab muab cov nab ntawm txhua hom kev sib txawv. Ntxiv mus, nab nplais yog ib qho tseem ceeb hauv kev txheeb xyuas lawv cov tsiaj raws li tus naj npawb ntawm cov nplai nyob hauv kab yog cov yam ntxwv rau txhua hom. Lawv nyob hauv ob qho tib si terrestrial thiab dej nyob. Txawm li cas los xij, muaj cov kab nab uas tuaj yeem hla huab cua ntawm cov ntoo yam tsis tau hla av. Predation yog tib txoj kev pub zaub mov rau nab, uas lawv tau tsim ntau hom kev sib txawv los immobilize preys. Lawv feem ntau tsis yog venomous tab sis venomous nab tuaj yeem tua yuav luag txhua tus tsiaj. Australia muaj feem ntau ntawm kaum tus nab venomous hauv ntiaj teb. Nab tsis zom lawv cov zaub mov, tab sis nqos raws li nws yog thiab cia lub plab zom mov. Lawv tuaj yeem txhawb nqa hauv cov suab puam thiab cov hav zoov. Hauv cov suab puam, qhov twg dej tsis tau yooj yim, nab nqus tag nrho cov dej hauv lawv cov tsiaj nyeg lub cev. Tsis tas li ntawd, lawv cov khoom excretory yog uric acid, uas tsis muaj dej. Nab yog cov khoom tseem ceeb ntawm ib puag ncig raws li lawv lub luag haujlwm ecological. Tsis tas li ntawd, cov neeg ntawm East thiab South-East Asian lub teb chaws npaj nab rau lawv noj.
Sib piv Ntawm Legless Amphibians thiab Snakes
| Legless Amphibians | Nug |
| >180 yam | >2, 900 hom |
| faib rau hauv thaj chaw sov ntawm Asia, Africa thiab South America | Dhia thoob plaws ntiaj teb suav nrog Australia |
| Nyob ib puag ncig ntub dej | Txhim kho kom nyob tau raws li thaj chaw hauv av los ntawm hav zoov mus rau cov suab puam |
| Tsis pom kev thiab daim tawv nqaij npog qhov muag | kev nkag siab zoo nrog rau kev pom IR |
| daim tawv nqaij tsis muaj nplai | daim tawv nqaij npog nrog nplai |
| Lub cev ntev tshaj plaws yog 1.5 metres | nab loj tshaj plaws yog anaconda uas loj hlob mus txog 8 meters |
| Ua pa tshwm sim los ntawm lub ntsws, tawv nqaij, thiab qhov ncauj kab noj hniav | Kev ua pa tsuas yog los ntawm lub ntsws xwb |
