Tu tub tu kiv ntawm hiav txwv lilies. Class hiav txwv Lily (yees duab)

Unpredictable ntiaj teb no ntawm marine lub neej, nws yog tag nrho ntawm surprises. Ib txhia ntawm lawv, nrog rau corals thiab algae tsim ib tug tshwj xeeb underwater lub vaj. Crinoids - ib tug benthic tsiaj, tsis nroj tsuag, raws li nws nkawd thaum xub thawj siab ib muag. Lawv mus rau lub echinoderms.

Inhabited los ntawm hiav txwv lilies

Lawv cov chav kawm ntawv yog heev uas nws kim heev cheeb tsam ntawm tis. Nyob rau hauv lub ntiaj teb no lub oceans yog yuav luag tsis muaj chaw nyob qhov twg nws twb tsis tau ntsib crinoids. Muaj txog 700 hom plaub-hnub qub. Lavxias teb sab marine dej inhabited los ntawm tsuas yog 5 ntawm lawv hom.

Crinoids nyob tag nrho tej dej hiav txwv. Tob rau lawv txheej. Lawv tag nrho cov Attendance zoo. Tsis tau lub ib thooj ntawm cov tsiaj xav kom khom nyob rau hauv lub sov so dej hiav txwv dej nrog thickets ntawm coral reefs, muaj nyob rau hauv lub qhov ntiav depths (200 meters).

Hom ntawm hiav txwv lilies

Crinoids chav kawm ntawv yog sawv cev los ntawm ob hom ntawm plaub-hnub qub - stalked thiab besstebelchatymi. Tag nrho cov tib neeg, tsis hais ntawm lawv cov hom, uas txuas mus rau tag nrho cov xaiv ntawm cov khoom uas yog nyob rau hauv cov dej. Stalked crinoids, entrenched soj caum rau txhua yam, yeej ib txwm nyob twj ywm nyob rau hauv no txoj hauj lwm. Zone lawv metabolic txwv qhov ntev ntawm lub kav uas lawv yees.

Besstebelchatye Lily, deprived ntawm kev txhawb nqa, peb tau tau ntau dua txoj kev ywj pheej ntawm kev txiav txim. Lawv tsoo kom deb ntawm lub substrate, yog tau kov yeej lub me ntsis kev ncua deb. Floating tsiaj vim rays, ua hauj lwm zoo li ib tug tis ntses. Txawm li cas los, txhua soj caum devoid cwj mem hnub qub nyob rau hauv txoj kev loj hlob yuav tsis dhau daim ntawv soj caum kauj ruam. Qhov no feature thiab tus tu tub tu kiv ntawm ob hom ntawm hiav txwv lilies theem lawv ua ke.

lom hauj lwm

Nyob rau hauv lub npe ntawm no hauv chav kawm ntawv ntawm cov tsiaj Greek cov hauv paus hniav. Crinoids (Crinoidea) translates li "ib yam li cov lilies." Thiab xwb, nyob rau hauv cov neeg teej tug mus rau cov hoob kawm no, zoo heev lub cev, zoo li ib tug lush paj. Cov kev zoo sib thooj ntawm paj tsub kom cov yeeb yuj coloring lub cev plaub hnub qub. Txais pom ntawm lub hiav txwv zoo nkauj zeej, thiab kuv xav ua kom tau ib daim duab ntawm nws. Crinoids - ib tug delightful kho kom zoo nkauj underwater lub vaj, uas ua hauj lwm nyob rau hauv cov creation ntawm ib tug ci ntsa iab designer - qhov nws tus kheej.

Crinoids muaj ib khob zoo li tus lub cev nrog lub qhov ncauj kab noj hniav nyob rau hauv lub center. Up los ntawm lub khob tsa branched rays (tes) thiab whisk. Peb stalked crinoids txuas mus rau hauv qab ntawm lub khob soj caum hlob mus rau ib tug ntev ntawm ib 'meter'. Petiolus cab kuj nrog sab appendages (cirri) txuas mus rau hauv av. Besstebelchatye lub lilies yog rooj noj cirri, qhov xaus ntawm uas yog muab ib tug serrated los yog "claws". Ua tsaug rau lawv besstebelchatye neeg lo rau hauv av.

Feather-hnub qub yog cov tsuas echinoderms, uas muaj kev tswj kom khaws lawv cov pog koob yawm txwv yam ntxwv orientation ntawm lub cev. Nraub qaum lawv clings mus rau hauv av, thiab hais tias qhov chaw uas yog muab nrog lub qhov ncauj kab noj hniav muab upwards. Lub hauv paus ntawm cov qauv ntawm lawv lub cev mus tso tsib-txoj kev radial symmetry. Lub cev tsim los ntawm tsib rays muaj peev xwm ntawm multiply muab faib mus rau hauv qhov chaw thiab daim ntawv ntawm 10-200 "cuav ob txhais tes." Cov kab teeb yog muab nrog ntau sab ceg (pinnulami).

Tsaug rau lub tag nrho-tshuab Corolla tsim ib yam ntawm cov network uas catches plankton thiab detritus. Rays framing rau sab hauv sab yog muab nrog ib tug muco-ciliary grooves, uas yog txo kom lub qhov ncauj kab noj hniav. Ib zaug nyob rau cov zaub mov txav lawv mus rau nws lub qhov ncauj. Calyx rau ntug los ntawm lub sab ntawm lub conical nce yog txawm peem rau nrog rau cov qhov quav qhib.

Txoj kev sab nraud calcareous cev pob txha pab feem. Nws muaj ob qhov chaw: endoskeleton rays thiab soj caum. Cov benthic tsiaj muaj tentacle, lub paj hlwb thiab kev ua me nyuam (ua rau lub tu tub tu kiv ntawm hiav txwv lilies) system. Cov kab noj hniav-rays txeem lub qia thiab ceg ntawm tag nrho cov xaiv systems.

Crinoids los ntawm lawv cov counterparts tsis tsuas taw qhia kom paub cov yam ntxwv ntawm cov dorsal-plab chaw kab uas sau los ntawm lub cev ntawm tag nrho cov tsiaj, tab sis kuj lwm configurations. Tentacle Cheebtsam ntawm lub system nyob rau hauv tus cwj mem-lub hnub qub yooj yim zog. Piv txwv li, nws tsis tau nkag mus rau hauv lub ampoule, kev tswj ob txhais ceg. Nws yog tsis pom nyob rau hauv cov tsiaj txhu thiab madreporite.

tu tub tu kiv

Peb nrog cov neeg nyob rau hauv ib tug tu tub tu kiv ntawm hiav txwv lilies. Cov echinoderms yog dioecious tsiaj. Kev sib deev khoom poob rau hauv cov neeg pinnuly uas nyob ze zog mus rau lub khob. Txiv neej feem ntau yog thawj jetted phev los ntawm pinnul siv tshwj xeeb qhov.

Nws tus cwj pwm ua rau stimulation ntawm cov poj niam, tsis muaj ib qhov chaw mos ducts. Nws pinnuly cia li tawg, thiab lub caij nplooj zeeg tawm ntawm lawv lub qe. qe fertilization yog ua li cas txoj cai nyob rau hauv cov dej, thiab ces lawv tig mus rau hauv kab doliolyariyu chim. Yog li ntawd, yog tu tub tu kiv ntawm hiav txwv lilies.

txoj kev loj hlob doliolyary

Tom qab 2-3 hnub doliolyariya tso rau hauv av. Nws tej nyiaj yog muaj zog rau lub substrate, yam khoom khoom thiab txawm tias lawv tus kheej zoo neeg.

Thaum poob lawv cilia, nws yuav tsau.

Kauj ruam pentakrinusa qhia nyob rau hauv hais tias lub khob maj manifested tsib-taw lub qauv. Soj caum hlob, cuag, tsim beams txuas disk qab. Doliolyariya pib zoo li ib tug me me plaub-hnub qub, bobbing rau tus kav. Nws loj mas nws txawv nyob rau hauv lub luv ntawm 0.4-1 cm. Khaub thuas arctic dej ntxias cov kab loj hlob mus rau 5 cm nyob rau hauv ntev. Thaum lub sij hawm doliolyariya ncua, yog mus rau hauv soj caum thiab khob, uas tom qab tsim lub qhov ncauj. Rau ntawm no theem ntawm kev loj hlob ntawm lub kab tsistoideynaya xaus.

Txawv nyob rau hauv txoj kev loj hlob ntawm cov pab pawg

Yog hais tias lub tu tub tu kiv ntawm hiav txwv lilies thiab kev loj hlob ntawm kab ntawm raws nraim tib yam, tom qab kawm tiav ntawm theem pentakrinusa nyob rau hauv ob qho tib si ib pawg ntawm cov crinoids ntxiv maturation ntws txawv. Stalked cov tib neeg, chained mus rau ib qhov chaw, tau tshiab feem ntawm tus kav. Lawv lengthening tus kav ua zoo li ib pawg ntawm cov npib (rau ib tug neeg pob txha caj qaum strung on txhua lwm yam).

Pob txha caj qaum muaj ib tug movable kev twb kev txuas uas muab nqaij. kav chaw permeated channel, qhov twg lub qab haus huv pw thiab nkaum lwm yam kabmob. Cirri teem nyob rau hauv ob txoj kev: yog ib ncig ntawm lub soj caum, los yog nyob rau hauv nws lub hauv paus.

Cov acquires zoo kawg kev zoo sib thooj nrog lub paj uas, nyob rau hauv qhov tseeb, qhia lub ntau yam xav tsis thoob duab. Crinoids niaj hnub stems muaj ntau lengths, nws yog feem ntau yog tas rau 75-90 cm. Thiab fossils stems ntev mus txog 21 m. Feather lub hnub qub antiquity twb tiag tiag giants.

Besstebelchatye Lily npaj txawv. Tom qab ib hlis thiab ib nrab ib khob ntawm nws tus kheej lawm los ntawm tus kav, cia ntab dawb do. Cov soj caum tuag nws thiaj li.