Ancient hove crossopterygian

hove Crossopterygii tiri mumwe kupfuura kare mhando hove anozivikanwa murume. Kusvikira mukutanga ramakumi remakore vakanzi yakatotsakatika inenge 70 mln. Makore akapfuura. Dzavo zvisaririra zvemhuka zvisaririra akawanikwa akawanda Freshwater uye zvomumvura mvura panyika. Kunyatsoongorora zvisaririra akabvumira masayendisiti kuti vafunge hove idzi kuti nhengo muchikwata che zvikara zviri zvakakura. conical meno zvakawanda, musculature simba uye muviri asi akanaka urefu (kubvira 7 masendimita 5 m) chiri mhuka akaita zvakakomba kurwa chero aqueous ezvinhu.

hove crossopterygian zita raro akagamuchira kubva kujairika nemamiriro marangwanda ose dzine zvimbi. Chaiva vanoverengeka mapazi muchimiro bhurasho zvikamu. Kwakadaro nemamiriro zvimbi kwete chete rinobvumira hove kupedza chaizvo nguva yakawanda pazasi dura, asi akabudirira zvinokambaira pasi nokubatsirwa zvimbi. The chikuru mugumisiro nemafambiro izvi kwakura simba musculature.

Pashure pokunyatsoongorora zvose data, masayendisiti ano vakasvika pakugumisa kuti mukuru zvechadenga hove kunoita kuti tiswedere zvakafanana pakati Crossopterygii hove uye vokutanga amphibians. mhedziso iyi inobva zvimwe dzinonakidza features, kuwanika vose makirasi. Imwe uchapupu dzidziso iyi yave ainzi Tiktaalik. Vachinzi chokuita hove Crossopterygii, takaberekwa tine Runako pamusoro garwe zvakanaka, izvozvo ndiyo yaiva nhamba features, kubatanidza pamwe amphibians. Aiva miviri mweya: dakashwa uye yemapapu uye zvimbi kwakaoma nowenyika sechivako hwemhuka yayo.

Zvichienderana zvose nesayenzi pamusoro chasvika mhedziso kuti hove superorder crossopterygian akatora Zvinoshingaira ari Kushanduka amphibians, akapa upenyu panyika zvimwe zvisikwa, uye iye zvachose nokutsakatika.

Zvisinei, kutaura uku zvaionekwa zvakanaka chete kusvikira 1938, apo ruzha rakakura pakati masayendisiti akabudisa imwe hove kujairika abatwa South Africa. Ms Latimer Kuongorora inotevera hove panguva zvavo hove trawler, akasangana chinoshamisa yebhuruu hove kureba vanenge 150 masendimita uye achirema vanenge 57 makirogiramu. Zvisinei, nokuti kuziva kwake mukadzi akaenda miziyamu, zvakanga asingakwanisi kuona zvariri inoonekwa nokuzivikanwa. Kuva pasina mukana kuponesa hove mupenyu, Latimer vachishandisa stuffed taxidermist yakabereka chisikwa ichi. Ndakashamiswa yaiva yakakurumbira Purofesa Smith, paakaona zviratidzwa izvi zvose zvinoitwa mumiririri Crossopterygii kukupfura. Pashure pokunyatsofeya kuongororwa uye kuongorora zvakawanwa hove ichi anonzi ari kukudzwa mukadzi akavhura chiedza chake. Zvino Latimeria chalumnae - chete mupenyu hove Crossopterygii panyika.

Hype akamutsa pamusoro kujairika kuwanikwa, akatungamirira vanhu vakawanda kumhanya kunotsvaka vatorwa vaigara madziva. Zvisinei, kuti coelacanth abatwa akakurumidza kuurayiwa, kunyimwa rwokuzvarwa dzinogarisana. Zvakatonyorwa saka vakanga vachiramba vakasununguka hove "anomutswa" hove dzaro chikuru vakawanda akatora yakaoma mamiriro dziviriro.

Crossopterygii coelacanth hove, kufanana namadzibaba avo ekare, muri zvikara simba. Kufanana nemamiriyoni emakore apfuura, vakanga afuridzire kutya avo vakaurayiwa zvizhinji unopinza mazino uye simba zvimbi dzakasimba kuti akafanana netsoka dzakapfava mhuka. Under pabutiro dzinochengeterwa usiku coelacanth vanovanda kwavo chayabata; Squid uye hove duku. Zvisinei, uye pachavo vanogona kuva nyore mabiko nokuda makuru zvikara inova Sharks.

Most specimens guru izvi dzemarudzi tinosvika kureba vanenge 2 metres uye vanoyera pedyo makirogiramu 100. Kureba achangozvarwa coelacanth muviri anenge 33 cm. Masayendisiti anodavira kuti vana vari kukura asi zvishoma nezvishoma, asi ndinoonga kuti propensity kuti upenyu hurefu somugumisiro achikura ari kumbonyanya guru specimens.