Crossopterygian fish Ancient

iintlanzi Crossopterygii ungomnye iintlobo ezininzi mandulo zentlanzi ezaziwayo emntwini. Ide kwenkulungwane yamashumi amabini babesithi extinct malunga 70 mln. Kwiminyaka eyadlulayo. Izidumbu iifosili eziye zafunyanwa ezininzi ahlambulukileyo elwandle amanzi emhlabeni. Ukuhlolisisa iintsalela eye wavumela izazinzulu ukucebisa ukuba ezi ntlanzi kuba kudidi ezidla kunokuba kakhulu. amazinyo ezininzi etsobhileyo, musculature enamandla umzimba ubude kunokuba endilisekileyo (7 cm ukuya m 5) sisilwanyana wenza Olwa kakhulu na bume zolwelo.

Igama iintlanzi layo crossopterygian evela isakhiwo angaqhelekanga amathambo amaphiko yaso. Izilingo ezininzi branched ngohlobo komsindo ibrashi. Loo isakhiwo le amaphiko ivumela kuphela intlanzi ku tirhisa kakhulu ixesha elininzi emazantsi dama, kodwa ukuhamba ngempumelelo ngpaha komzantsi encediswa amaphiko. Isiphumo engundoqo bentshukumo abe musculature enamandla kakhulu.

Emva kokucingisisa yonke idatha, izazinzulu mihla baye kwisigqibo sokuba iimpawu ngokubanzi wentlanzi ivumela ukuba bazobe ukufana phakathi Crossopterygii iintlanzi kunye eziphila kuqala. Esi sigqibo sisekelwe phezu kwezinye izinto ezinomdla, kufumaneka kuzo zombini ezi ndidi. Enye ubungqina boku lethiyori ogama Tiktaalik. Ekubeni ezinxulumene iintlanzi Crossopterygii, sanikwa ubuhle ingwenya, yayinamandla nani likhulu omsebenzi osemqoka, edibanisa kuyo izilwanyana eziphila emhlabeni nasemanzini. Yena waba impefumlo kabini: kumculo kunye wemiphunga amaphiko phantse embhoxo isakhiwo kwamalungu isilwanyana.

Ngokusekelwe zonke inzululwazi ngasentla lifikelele kwisigqibo sokuba crossopterygian iintlanzi superorder yathatha inxaxheba ekudalweni nasekusungulweni eziphila emhlabeni nasemanzini, Wabunikela ubomi emhlabeni nezinye izidalwa, yaye yena extinct ngokupheleleyo.

Noko ke, le yinto yayigqalwa elungileyo kuphela de 1938, xa buzz enkulu phakathi izazinzulu ivelise intlanzi engaqhelekanga ebanjiswe eMzantsi Afrika. Ukuhlolisisa catch esilandelayo kwi trawler yokuloba eziqhelekileyo, uNks naye wadibana engaqhelekanga ubude iintlanzi oluhlaza cm malunga 150 nezinobunzima 57 kg. Ngokuba ukufunyanwa wakhe umfazi waya myuziyam, Noko ke, oko singakwaziyo umzekelo ethile ungubani. Ukuba akukho ithuba ukugcina iintlanzi ubomi, naye usebenzisa taxidermist abotshwe isiqulunqile esi sidalwa. Ndamangaliswa ke odumileyo Professor Smith, xa wabona lo mboniso zonke iimpawu squad elimele Crossopterygii. Emva kokuba uvavanyo kunye nohlahlelo iziphumo zalo intlanzi ogama lakhe behlonipha mfazi wavula ukukhanya kwayo. Ngoku Latimeria chalumnae - ophilayo kuphela iintlanzi Crossopterygii kwiplanethi yethu.

Hype okwavela ukufunyanwa ezingaqhelekanga, wabaqhuba abantu abaninzi ufika ekhangela abemi belo amachibi. Nangona kunjalo, lo coelacanth bafunyanwe ngokukhawuleza wabulala, ndayihluthwa zokuhlala zendalo. Kuye ke ngoko kwakhatywa ayigange free "avuswe 'iintlanzi kunye ephambili labantu bayo wathabatha ukhuseleko karhulumente onzima.

Crossopterygii coelacanth intlanzi, ngathi ookhokho babo yamandulo, ke amarhamncwa olomeleleyo. Kanye kwizigidi zeminyaka eyadlulayo, ukuba sikhuthale uloyiko amaxhoba abo ezininzi amazinyo ezibukhali amaphiko emtyaba strong efana ezihamba ngamathupha azo isilwanyana. Phantsi langaphandle okhuseleko ebusuku coelacanth zilalele lixhoba labo; squid kunye neentlanzi ezincinane. Nangona kunjalo, yaye bona angenziwa ngokulula ukuba abe isidlo ngenxa ezizingelayo ezinkulu, leyo ke ookrebe.

Uninzi iisampulu enkulu yale ntlobo ifikelele kubude malunga 2 eemitha, nobunzima esisondele ku-100 kg. Ubude umzimba usana coelacanth olusanda malunga-33 cm. Izazinzulu zikholelwa ukuba abantwana ezikhulayo kunokuba kancinci, kodwa kubulelwe olungaka ukuba ubomi elide ngenxa yokukhula kwindawo ethile esemzimbeni enkulu kangangoko.