Nyob rau hauv cov tsiaj txhu biodiversity peb pom tias txhua pab pawg yog peculiar, txij li thaum lawv evolutionary yam tau tso cai rau lawv txawv rau ntau yam laj thawj. Yog li, peb pom cov gastropods, cov tsiaj feem ntau ntawm cov cwj pwm hauv dej, tab sis qhov ntawd kuj tau kov yeej lub ntiaj teb ib puag ncig kom tsawg dua. Lub taxonomy ntawm cov tsiaj no muaj ntau yam sib txawv, mus txog rau ntau txhiab tus pob txha thiab tsiaj nyob tau raug txheeb xyuas. Hauv tsab xov xwm no ntawm peb lub xaib, peb nthuav qhia cov ntaub ntawv hais txog gastropods yog dab tsi, lawv cov yam ntxwv thiab cov piv txwv
gastropods yog dab tsi?
Gastropods yog ib chav kawm ntawm cov tsiaj txhu uas tsis muaj cev nqaij daim tawv, nyob rau ntawm phylum ntawm molluscs, thiab feem ntau, nyob ntawm hom, hu ua xws li. xws li snails, av slugs, hiav txwv slugs, limpets, hiav txwv hares, hiav txwv butterflies, thiab lwm yam.
Lawv yog ib pab pawg neeg sib txawv, qhov tseeb yog qhov loj tshaj plaws hauv lawv lub cev, nrog rau keeb kwm nthuav dav thiab ua tau zoo, muaj pov thawj los ntawm adaptive radiationuas lawv tau muaj, uas yog, lawv tau faib ua ntau hom thiab kev lis kev cai.
Discover nyob rau hauv tsab xov xwm tom ntej ntawm peb qhov chaw hom molluscs, lawv cov yam ntxwv thiab piv txwv, ntawm no.
Kab mob plab
Vim nws muaj ntau haiv neeg thiab hluav taws xob, muaj ob peb yam ntxwv uas yuav hais txog ntawm pawg tsiaj no. Txawm li cas los xij, cia peb paub nws cov yam ntxwv tseem ceeb.
- pab pawg yog tsim los ntawm ntau tshaj 65,000 hom: nruab nrab ntawm cov ciaj sia thiab cov pob txha.
- Lawv tau kov yeej xov xwm txawv: marine, terrestrial and fresh water. Txawm hais tias muaj ntau haiv neeg loj tshaj plaws nyob hauv hiav txwv.
- Lawv muaj qhov sib txawv : nyob rau hauv cov tsiaj hiav txwv peb pom tshaj feeb, NW nyuam qhuav yuav luag ib millimeter inch, hos muaj av snails uas ntsuas txog 20 centimeters ntev. Txawm li cas los xij, muaj cov tsiaj hauv hiav txwv uas tuaj yeem ntsuas txog 130 cm ntev.
- Lawv tau tsim : muaj cov ntaub ntawv tseem ceeb hauv hiav txwv thiab lwm yam hauv av uas ua pa cua, yog li lawv tau hloov zuj zus ntxiv.
- In essence nws symmetry is bilateral: Txawm li cas los xij, as lawv ua txoj kev tig los yog sib tw, lawv xaus nrog cov duab asymmetrical.
- Lawv tuaj yeem muaj lossis tsis muaj plhaub: uas ib txwm nyob hauv ib daim, uas yog vim li cas lawv tau raug hu ua univalves.
- The shell varies: nws tuaj yeem pom hauv qee hom, lossis tsis txaus siab vim nws me me thiab sab hauv.
- : thaum tam sim no nws tuaj yeem coiled raws li pom nyob rau hauv ntau hom, los yog nws tsis tas yuav tuaj qhia daim ntawv no. Tsis tas li ntawd, cov kev taw qhia uas lub plhaub yog dov yog kev txiav txim siab ntawm caj ces thiab tuaj yeem ua rau sab xis lossis sab laug. Tej zaum koj yuav txaus siab saib cov lus hauv qab no hais txog ntau hom seashells uas muaj nyob.
- Lawv muaj nyob hauv ntau yam dej hiav txwv thiab ntawm different depths: yog li ntawd, lawv nyob hauv marine, brackish, dej tshiab, swamps, pas dej, thiab lwm yam.
- Ntawm av tej zaum yuav muaj txwv ntau nyob ntawm: av noo, acidity, muaj cov zaub mov thiab kub, txawm li cas los xij, lawv muaj ntau haiv neeg hauv hav zoov, hauv av thiab pob zeb, ntoo, nyom thiab txawm nyob rau lwm yam tsiaj.
- Lawv feem ntau yog heev sedentary and slow-moving.
- Koj locomotion is varied: nws tuaj yeem dhau los ntawm ua luam dej, nce toj lossis swb. Qee hom tuaj yeem faus tau yooj yim.
- : ntau hom yog herbivores, tab sis kuj muaj carnivores thiab scavengers.
- Koj tuaj yeem xyaum ua pa sib txawv: nws yog ib yam rau ntau hom ua pa los ntawm gills, lwm tus los ntawm lub mantle, thiab muaj kuj yog cov uas lawv ua li no los ntawm lub ntsws zoo li tus qauv.
- The is open : More. muaj ib lub raum.
- The is : uas muaj ntawm peb khub ganglia uas txuas rau paj hlwb.
- Lawv muaj ob lub qhov muag los yog photoreceptors yooj yim: ntxiv rau lwm cov kabmob tactile lossis chemoreceptors.
- Lawv tuaj yeem muaj cais poj niam los tsis: yog, lawv tuaj yeem ua monoecious thiab kuj muaj dioecious.
- Hom fertilization tuaj yeem sib txawv: nyob rau hauv ntau hom fertilization yog sab hauv, tab sis muaj ntau cov primitive gastropods nrog rau sab nraud fertilization.
- Certain species of snails are poisonous.
ZAUM ZAUB LAG LUAM NOJ HAIV NEEG HAIV NEEG THIAB TXHUA YAM HAIV NEEG.
Types of gastropods
Vim muaj ntau haiv neeg ntawm gastropods thiab lawv cov evolutionary keeb kwm, taxonomy yog ib yam ntawm cov kev sib cav sib ceg nyob rau lub sij hawm, uas yuav txuas ntxiv mus ntev li ntev raws li kev nce qib thiab cov kev tshawb fawb txuas ntxiv mus.
Nyob rau hauv qhov kev nkag siab no, muaj ib tug dav faib ntawm pab pawg, tejzaum nws xam tau tias yog tsis raws li txoj cai, tab sis uas tseem yuav yog nquag siv, thiab pib tsim peb hom (subclasses) ntawm gastropods, uas yog cov hauv qab no.
Subclass Prosobrach
Nws yog tsim los ntawm ntau tshaj 65,000 hom thiab muaj cov yam ntxwv nram no:
- Lawv yog marine snails: tab sis peb kuj pom qee yam freshwater gastropods thiab terrestrial.
- Pab los yog lub gill: lawv nyob pem lub plawv.
- Dej ncig ntawm tus tsiaj tshwm sim ntawm sab laug mus rau sab xis.
- Lawv muaj ib khub tentacles.
- Ntau lawv nthuav tawm operculum: uas yog cov qauv uas kaw lub plhaub.
ZAUB MUAB NIAM TXIV Muaj nyob hauv thaj chaw Anterior.1
Subclass Opisthobranch
Qee 4,000 hom tau txheeb pom thiab ntawm lawv cov yam ntxwv peb pom:
- Cov npe muaj xws li: hiav txwv slugs, hiav txwv hares, hiav txwv butterflies, thiab canoe shells.
- Ntau pab pawg yog ntawm marine cwj pwm: nyob hauv pob zeb thiab clumps ntawm algae.
- Lawv feem ntau muab faib ua ob hom: cov gills thiab shells, thiab cov uas tsis muaj lawv, tab sis nrog cov qauv gill thib ob.
- Lawv tuaj yeem muaj qhov ib nrab los yog tag nrho detorsion.
- Ob lub qhov quav thiab lub qhov ncauj, thaum tam sim no, nyob rau sab xis lossis sab xis ntawm tus tsiaj.
- The sexes muaj nyob rau hauv txhua rooj plaub .
- Lub plhaub yog txo los yog tsis tuaj.
- Qee muaj tshuaj tiv thaiv.
- Qee hom muaj tentacles.
- Qee zaum ko taw tau raug hloov ua ib qho fin rau ua luam dej.
Subclass Pulmonata
Muaj txog 28,000 hom thiab ntawm lawv cov yam ntxwv tseem ceeb peb tuaj yeem hais:
- pab pawg no suav nrog: snails av, av slugs thiab qee hom tsiaj nyob hauv dej khov.
- The gillshave disappeared: Txawm hais tias qee hom muaj ib Secondary.
- LUB MANTLE yog vascularized thiab tau dhau los ua lub ntsws rau kev ua pa.
- Ob hom dej hiav txwv thiab av av muaj pair of tentacles.
- Hmoob cov pab pawg muaj qhov muag.
Don't miss the next article on our site with the Types of snails: marine and terrestrial, below.
Piv txwv gastropods
Qee yam piv txwv ntawm gastropods yog:
- Poj huab tais snail (Lobatus gigas).
- Florida Crown Conch (Melongena corona).
- Noj conch (Triplofusus papillosus).
- Shankha plhaub (Turbinella pyrum).
- Abalone (Haliotis).
- Drunken sea slug (Aplysia californica).
- Bubble Snails (Acteocin).
- Hiav txwv hare (Aplysia punctata).
- Thick-horned Nudibranch (Hermissenda crassicornis).
- Sea Slugs (Elysia).
- Roman snail (Helix Pomatia).
- Rotund discus qwj (Discus rotundatus).
- Hairy Snail (Trochulus hispidus).
- Ghost slug (Selenochlamys ysbryda).
- Smooth land slugs (Deroceras).
