Ancient izinhlanzi crossopterygian

inhlanzi Crossopterygii ungomunye kwezinhlobo eziningi zasendulo zezinhlanzi ezaziwayo. Kuze ekuqaleni kwekhulu lamashumi amabili babebhekwa yokuqothulwa cishe 70 mln. Eminyakeni eminingi edlule. izidumbu zawo omile kutholakele eziningi angenasawoti kanye zasolwandle emanzini iplanethi. Ukuhlolisisa zamathambo ukuvumele ososayensi basikisela ukuthi lezi zinhlanzi basonta isigaba ezidla kunalokho sina. namazinyo eziningi oyindilinga, ezicutshini enamandla nomzimba obuphelele kunalokho ehloniphekile (kusuka 7 cm 5 m) kuyinto isilwane benza Olwa sína noma yimuphi imvelo aqueous.

igama izinhlanzi zayo crossopterygian etholakele isakhiwo elingavamile amathambo endoda amaphiko esinamanzi. Lalinama eziningana branched ngesimo ibhulashi izingxenye. isakhiwo amaphiko olunjalo olwenza hhayi kuphela izinhlanzi ukuchitha ngempela isikhathi esiningi ezansi kwesigubhu, kodwa futhi ukuhambisa ngempumelelo ngezansi ngosizo amaphiko. Umphumela eyinhloko lezinhlangano babe ezicutshini ngempela enamandla.

Ngemva kokucabangela yonke idatha, ososayensi abaningi banamuhla baye bafinyelela esiphethweni sokuthi izici jikelele izinhlanzi ivumela umfuziselo phakathi Crossopterygii izinhlanzi kanye izilwane zasemhlabeni kuqala. Lesi siphetho sisekelwe emazwini kwezinye izici ezithakazelisayo, etholakala kokubili amakilasi. Omunye ubufakazi lo mbono uye ngokuthi Tiktaalik. Kokuba ezihlobene izinhlanzi Crossopterygii, wanika ukubukeka ezinhle ingwenya, kwakudingeka yisibalo esikhulu sabasebenzi esingakaze izici, ngokuhlanganisa ngayo izilwane zasemhlabeni. Wayesebenza kahle umoya double: gill futhi wamaphaphu amaphiko cishe okusikhumbuza isakhiwo nemilenze wesilwane.

Kususelwa zonke isayensi engenhla bafinyelela esiphethweni ukuthi crossopterygian izinhlanzi superorder wathatha ingxenye esebenzayo ukuvela eziphila emanzini nasezweni, wanikela ngokuphila emhlabeni ezinye izidalwa, futhi nguye yokuqothulwa ngokuphelele.

Nokho, la mazwi sasibhekwa njengophawu lokuthi ezinhle kuphela kuze 1938, lapho i-buzz omkhulu phakathi ososayensi bukhicite izinhlanzi engavamile wabanjwa eNingizimu Afrika. Ukuhlola catch olandelayo ngo abavamile ukudoba Isikebhe sokudoba, Ms Latimer ihlangabezane ongaziwa izinhlanzi blue ubude mayelana 150 cm futhi enesisindo mayelana 57 kg. Nokho, ukuze lokho akuthola owesifazane mumbe waya Museum, kwaba ukunquma Ngokwesibonelo eqondile ungubani. Njengoba engenabo abangane ithuba ugcine izinhlanzi uyaphila, Latimer usebenzisa olungisa izikhumba zezilwane eyayigcwele ekhiqizwa lesi silwane. Yeka ukumangala okutholwa kwaba edumile UProfesa Smith, lapho ebona lo mbukiso zonke izici omele squad Crossopterygii. Ngemva ahlolwe kahle emzimbeni futhi ukuhlaziya okutholakele le nhlanzi ogama lakhe behlonipha owesifazane ovule ukukhanya kuye. Manje Latimeria chalumnae - ophilayo kuphela izinhlanzi Crossopterygii emhlabeni.

Hype ephakanyiswayo ngale ukutholakala engavamile, wenza abantu abaningi ukusheshe beyofuna abakhileyo ongavamile yabulala namachibi ezinhlanzi. Nokho, coelacanth ezibanjwa wabulala masinyane, zibancishe kwendawo yemvelo. Kuye-ke sinqatshiwe nibambe khulula "abavuselwe" izinhlanzi kanye labantu zako ezisemqoka wathatha ezinzima Ukuvikelwa isimo.

coelacanth izinhlanzi Crossopterygii njengokhokho bawo lasendulo, kukhona izilwane ezidla ezinye eqinile. Njengoba kuye kwenza izigidi zeminyaka edlule, ugqozi ukwesaba izisulu zabo eziningi amazinyo abukhali futhi amaphiko eziqinile eziqinile abafana isilwane ngezidladla. Ebusuku zokukhosela coelacanth Sihlala yimpango yabo: squid nenhlanzi ezincane. Nokho, futhi bona kalula abe idina ukuze izilwane ezidla ezinye emikhulu, okuyizinto oshaka.

zezinhlobo Iningi elikhulu lalezi zinyoni ukufinyelela ubude mayelana 2 amamitha balinganise eduze 100 kg. Ubude usana coelacanth umzimba imayelana 33 cm. Ososayensi bakholelwa ukuthi izingane ezikhulayo kunalokho kancane, kodwa sibonga propensity yokuphila isikhathi eside ngenxa ikhulela zezinhlobo kahle esikhulu.