Cov txheeb ze ntawm slugs thiab qwj uas nyob hauv dej hiav txwv, peb tham txog leej twg? Ntawm chav kawm, hais txog cov nudibranchs. Ntawd yog qhov lawv hu ua ib pawg cais cov leeg nyob hauv hiav txwv.

Niaj hnub no pab pawg no muaj txog ib txhiab hom tsiaj, qee yam peb yuav qhia koj hauv tsab xov xwm no. Dab tsi tshwj xeeb txog cov tsiaj no? Lawv txawv ntawm lwm cov kwv tij los ntawm yam (mollusks) li cas?

Ua ntej tshaj plaws, thawj qhov tsos. Tsuas yog saib ntawm cov kev zoo nkauj hauv qab no, nws tsuas yog tsim nyog rau lawv los npaj "kev sib tw ua kom zoo nkauj marine", vim tias lawv zoo rau xaiv, zoo - ib qho zoo dua lwm tus! Cov ntaub ntawv twg, cov xim dab tsi!

Tab sis cov qauv ntawm lub cev, lawv tsis txawv ntawm lwm qhov mob caj dab: txhua qhov zoo tib yam "ceg", uas ua raws li lub tshuab ua kom lub cev muaj zog, txhua qhov sib npaug ntawm lub cev thiab lub qhov muag me.

Los ntawm txoj kev, cov outgrowths heev (rhinophores) sawv cev rau lub cim "system" uas pab cov mollusk tsis tsuas yog tsis hnov ​​tsw, tab sis kuj tseem mus saj.

Cov kws tshawb fawb hu ua cov cuab yeej tshuaj no. Nrog rau qhov kev ua tau zoo tshwj xeeb, cov nudibranch mollusk tuaj yeem tau txais cov zaub mov yooj yim, txav mus los thiab txawm mus nkaum ntawm cov tsiaj.

Raws li cov txheej txheem sab hauv anatomical, nudibranchs tau muab faib ua ob pawg loj: eolides thiab doridids. Qhov pom ntawm gills thiab tus qauv ntawm lub siab ua rau pom cov neeg sawv cev ntawm ob pawg: doridids tam sim no gills thiab daim siab nyob sab hauv lub cev thiab yog ib qho khoom hauv nrog cev tag nrho, uas tsis tuaj yeem hais txog eolides (lawv tsis muaj gills, thiab daim siab yog segmented).

Dab tsi unites txhua nudibranchs? Thawj yog qhov muaj ntau haiv neeg ntawm lub cev: nws tuaj yeem sib txawv ntawm puag ncig mus rau elongated cab-puab.

Qhov thib ob kos npe yog qhov saum npoo ntawm sab nraud sab nraud ntawm pob tw: nudibranch mollusks tuaj yeem ua kom tiav du, thiab tseem muaj tubercles, ridges, quav, thiab txawm warty outgrowths.

Zoo, qhov thib peb, qhov kev pom zoo tshaj plaws uas sib sau ua ke txhua nudibranchs yog ib qho tsis txaus ntseeg ntawm cov xim thiab ntxoov ntxoo! Cov tsiaj no tuaj yeem pleev cov xim xiav, cyan, daj, liab, violet, ntsuab ... txhua lub xim tsis tuaj yeem suav!

Tab sis koj puas paub tias cov xim ntawm tib nudibranch mollusk tuaj yeem hloov pauv thiab nyob ntawm seb hom zaub mov qab dab tsi nws tau saj ua ntej no? Qhov no yog qhov tseeb tiag tiag - ua pov thawj los ntawm cov kws tshawb fawb!

Raws li rau lub cev qauv, cov nudibranchs txawv lawv tus kheej ntawm no: ntau yam ntawm cov leeg, pob, txaij thiab specks ua rau cov tsiaj zoo nkauj indescribably. Koj tuaj yeem soj ntsuam qhov no los ntawm kev saib daim duab ntawm txhua tus neeg sawv cev ntawm nudibranch mollusks.

Sib koom ua ke ntawm pawg mollusks thiab kev ua neej no: lawv txhua tus ib leeg. Tsis tas li ntawd, lawv tuaj yeem raug suav hais tias yog cov nomads mus ib txhis ntawm lub hiav txwv, vim tias lawv tau mob siab nrhiav zaub mov, thiab lawv yeej tsis muaj “tsev”.

Raws li cov khoom noj, cov tsiaj me yog xaiv rau kev tua tsiaj. Feem ntau, lawv cov ntawv qhia zaub mov suav nrog cov neeg sawv cev ntawm cov kua dej, cov nplauv, sedentary jellyfish, hiav txwv anemones, bryozoans, thiab txawm tias qe ntawm mollusks sib txawv.

Raws li koj tuaj yeem pom, "cov zaub mov" ntawm nudibranch mollusks tsis txawv txav ntawm kev txav ceev, tab sis nws tsis tuaj yeem yog lwm yam, vim tias "cov neeg yos hav zoov" lawv tus kheej maj mam txav thiab nyuaj.

Nudibranch mollusks muaj kev tiv thaiv los ntawm lawv cov yeeb ncuab los ntawm kev saib xyuas lub ntsej muag xim: lub cev pleev xim hauv cov xim ci tau pab lawv zais ntawm corals, tawm tsam keeb kwm ntawm cov pob zeb hiav txwv, cov nroj tsuag hauv qab thiab mus tsis muaj neeg pom.

Tab sis qee zaum "star-eyed" ntses hnub qub thiab ntses tseem pom tus tsiaj uas tsim txiaj, thiab tom qab ntawd tsis tshuav dab tsi rau nudibranch clam los ua lwm tus noj hmo.

Nudibranch

Nudibranch
Phyllidiopsis papilligera
Kev cais hom neeg

• Nudibranchiata
• Gymnobranhiata
• Gymnobranhia

Nudibranch (lat. Nudibranchia) - kev cais ntawm marine gastropods ntawm subclass Heterobranchia. Cov txheej txheem yam ntxwv muaj xws li tsis muaj ob lub plhaub thiab ib lub suab sib xws. Lawv cov tawv nqaij thib ob yog qhov muag tsis muaj qhov tiv thaiv tau tawm ntawm kev sib txuam ntawm ntau yam duab thiab muaj nyob ntawm ob sab lossis ntawm dorsal sab ntawm lub cev; hauv qee hom, gills tsis tuaj kiag li. Feem ntau yog cov neeg nyob ntawm hiav txwv sov thiab dej hiav txwv. Qee hom tsiaj muaj kuab lom thiab muaj xim ci. Txhua tus nudibranchs yog hermaphrodites. Khuv xim heev txog khoom noj.

Kev faib tawm

Raws li Lub Xya Hli 2018, cov tub cheev xwm suav nrog cov hauv qab no thiab superfamilies:

• Ntaus nrig Cladobranchia

• Superfamily Aeolidioidea Grey, 1827
• Superfamily Arminoidea Iredale & O'Donoghue, 1923 (1841)
• Superfamily Dendronotoidea Allman, 1845
• Superfamily Doridoxoidea Bergh, 1899
• Superfamily Fionoidea Grey, 1857
• Superfamily Flabellinoidea Bergh, 1889
• Superfamily Proctonotoidea Grey, 1853
• Superfamily Tritonioidea Lamarck, 1809

• Suborder Doridina
  • Khoom Siv Rau Nruab Nrab Bathydoridoidei
    • Superfamily Bathydoridoidea Bergh, 1891
  • Infraorder Doridoidei
    • Superfamily Doridoidea Rafinesque, 1815
    • Superfamily Onchidoridoidea Grey, 1827
    • Superfamily Phyllidioidea Rafinesque, 1814
    • Superfamily Polyceroidea Alder & Hancock, 1845