Sake bugun daga teku furannin bi-rana. Class teku Lily (photo)

Unpredictable duniya na marine rai, shi cike yake da surprises. Wasu daga cikin su, tare da murjãni da algae samar da wata musamman karkashin ruwa gidãjen Aljanna. Crinoids - a benthic dabbobi, ba shuke-shuke, kamar yadda alama da farko kallo. Sun kasance a cikin echinoderms.

Sanaki teku furannin

Su aji ne quite wani m yanki na rarraba. A duniya ta teku ne kusan babu wurare inda shi ya ba hadu crinoids. Akwai game da 700 jinsunan gashin tsuntsu-taurari. A Rasha marine ruwan sanaki kawai 5 na jinsi.

Crinoids zauna duk tekuna. Zurfin domin su m. Su duka daidai da kyau. Amma duk da haka da girma da waɗannan dabbobi fi son shirya a dumi teku ruwa tare da thickets na murjani reefs, suna located a kan m zurfin (mita 200).

Nau'in na teku furannin

Crinoids aji aka wakilta biyu jinsunan gashin tsuntsu-taurari - stalked da besstebelchatymi. Dukan mutane, ko da kuwa su irin, suna a haɗe zuwa dukan abubuwa da suke karkashin ruwa. Stalked crinoids, gindin zangarniya ga wani abu, ko da yaushe kasance a wannan matsayi. Zone su na rayuwa ya takaita tsawon na kara a kan abin da suka girgiza.

Besstebelchatye Lily, hana goyon baya, mu yi tsiwirwirinsu mafi girma da 'yanci na mataki. Su m tafi daga substrate, suna iya shawo kan kadan nesa. Shawagi dabbobi saboda haskoki, aiki kamar filafilin kifi. Duk da haka, kowane stalk bã tãre alkalami star a cikin ci gaban tsarin ba zai wuce a haɗe zangarniya mataki. Wannan yanayin da haifuwa na biyu jinsunan teku furannin bi-rana na kawo su tare.

nazarin halittu description

A cikin sunan wannan aji na dabbobi Greek asalinsu. Crinoids (Crinoidea) fassara a matsayin "kamar furannin bi-rana." Kuma lalle ne, haƙĩƙa, a cikin mutane da na ga wannan aji, dama jiki, kamar wani lush flower. The kama da furanni qara m canza launi jiki gashin tsuntsu taurari. Kamawa gaban teku kyau dabba, kuma ina so in yi wani hoto na shi. Crinoids - wani m ado karkashin ruwa gidãjen Aljanna, wanda ya yi aiki a kan halittar wani m zanen - halitta da kanta.

Crinoids da kofin-dimbin yawa jiki da na baka rami a tsakiyar. Up daga kofin tashe branched haskoki (hannayensu) da kuma whisk. Mun stalked crinoids a haɗe zuwa kasa daga cikin kofin zangarniya ke tsiro zuwa tsawon daya mita. Petiolus m tare da kaikaice appendages (cirri) a haɗe zuwa ga ƙasa. Besstebelchatye da furannin bi-rana ne kawai m cirri, iyakar abin da aka azurta su da serrated ko "fika". Godiya ga su besstebelchatye mutane jingina zuwa ga ƙasa.

Gashin tsuntsu-taurari su ne kawai echinoderms, wanda gudanar da riƙe su kakanninmu halayyar fuskantarwa na jiki. Dorsal gefe suka clings zuwa ga ƙasa, da kuma abin da surface cewa an bayar da baka rami ya juya sama. Dalili na tsarin jikinsu aza biyar-hanyar radial fasali. A jikin kafa ta biyar haskoki iya ninka kasu kashi sassa da form a 10-200 "ƙarya hannuwa." Bim suna bayar da mahara a kaikaice rassan (pinnulami).

Godiya ga cikakken ƙaho corolla kafa wani irin cibiyar sadarwa da cewa kama plankton da detritus. Rays siffatawa ciki gefen suna bayar da wani muco-ciliary GROOVES, wanda an rage wa baka rami. Da zarar a cikin abinci motsa su don bakinsa. Calyx a gefen daga gefe na conical tadawa sanye take da tsuliya bude.

Ulla waje calcareous kwarangwal taimaka segments. Yana kunshi sassa biyu: endoskeleton haskoki da zangarniya. Wadannan benthic dabbobi yana tentacle, juyayi da kuma haihuwa (Yanã shigar da haifuwa na teku furannin bi-rana) tsarin. A rami-haskoki shiga da kara da kuma reshe na duk kaddamarda tsarin.

Crinoids daga takwarorinsu ba kawai daidaitacce halayyar da dorsal-ciki cibiyar line cewa gudanar ta hanyar jikin dabbobi, amma kuma waje jeri. Tentacle aka gyara daga cikin tsarin a cikin alkalami-star Sauki. Alal misali, shi bai shigar da ampoule, domin iko da kafafu. Yana ba a samu a dabbobi da madreporite.

haifuwa

Mun magance waɗanda suke a cikin wani haifuwa na teku furannin bi-rana. Wadannan echinoderms ne iri guda ba dabbobi. Jima'i kayayyakin fada cikin wadanda pinnuly cewa suna located kusa da kofin. Male yawanci farko jetted maniyyi daga pinnul amfani musamman ramukan.

Hali take kaiwa zuwa ruri na mace, ba ta da wata al'aura ducts. Ta pinnuly kawai fashe, da kuma fada da su, qwai. kwai hadi da aka yi dama a cikin ruwa, sa'an nan suka juya zuwa larvae doliolyariyu ganga. Saboda haka akwai haifuwa na teku furannin bi-rana.

ci gaba doliolyary

Bayan kwanaki 2-3 doliolyariya zaune a kan ƙasa. Its sabon tip aka ƙarfafa a kan substrate, wani daskararrun abubuwa da kuma ko da nasu irin mutane.

Bayan rasa su cilia, shi ya zama gyarawa.

Mataki pentakrinusa bayyana a cewa kofin hankali bayyana biyar-nuna tsarin. Zangarniya tsiro, mika, ci gaba bim a haɗe faifai ƙaruwa. Doliolyariya fara kama wani kankanin gashin tsuntsu-star, bobbing a kan tushe. Its size dabam a cikin tazara na 0.4-1 cm. Cold Arctic ruwan sa da larvae to girma zuwa 5 cm a tsawon. A kan lokaci doliolyariya mika, bambanta a cikin zangarniya da kofin, wanda baya kafa bakinsa. A wannan mataki na ci gaba da larvae tsistoideynaya ƙare.

Bambance-bambance a cikin ci gaban da kungiyoyin

Idan haifuwa na teku furannin bi-rana da kuma ci gaban larvae na daidai da wannan, bayan kammala mataki pentakrinusa a duka kungiyoyin na crinoids kara maturation gudana daban. Stalked mutane, ƙuƙuntacce zuwa wuri guda, saya sabon sako na kara. Su tsawon kwanakinka da kara zama kamar wani tari na tsabar kudi (ga mutum vertebrae strung a kan juna).

Vertebrae da m dangane wanda ya samar da tsoka. kara cibiyar Ribar tashar, inda jijiyoyi karya da kuma boye wasu gabobi. Cirri shirya a hanyoyi biyu: ko dai a kusa da zangarniya, ko a karkashi.

Mutum yakan mallaki m kama da flower cewa, a gaskiya, nuna mahara shahararre hotuna. Crinoids zamani mai tushe da daban-daban tsawo, shi ne yawanci iyakance zuwa 75-90 cm. Kuma burbushin mai tushe tsawon kai 21 m. Gashin Tsuntsu star tsufa kasance real Refayawa.

Besstebelchatye Lily tasowa daban. Bayan wata daya da rabi a kofin da kansa karya daga tushe, bari taso kan ruwa da yardar kaina. A zangarniya mutu ƙarshe.