Ngo-2011, izazi ze-paleontologists zathola i-fossil egcinwe kahle yokhokho wemikhomo enemilenze emine ebizwa ngokuthi. I-Peregocetus pacificus - ukutholakala okunikeza ukukhanya okusha ekuguqukeni kwezilwane ezincelisayo ukusuka ezweni ukuya olwandle.
Okhokho bemikhomo namahlengethwa bahamba emhlabeni eminyakeni engaba yizigidi ezingu-50 edlule ezifundeni manje ezihlanganisa amazwekazi aseNdiya.
Izazi ze-paleontologists ngaphambilini zathola izinsalela zezinhlobo zezilwane eNyakatho Melika ezazineminyaka eyizigidi ezingu-41.2 ubudala, ziphakamisa ukuthi ngalesi sikhathi, ama-cetaceans ayeselahlekelwe amandla okuthwala isisindo nokuhamba eMhlabeni.
Lesi sibonelo esisha, esichazwe ocwaningweni olushicilelwe kumagazini ka-April 2019, i-Current Biology, besineminyaka eyizigidi ezingama-42.6 ubudala futhi sinikeze ulwazi olusha mayelana nokuvela kwama-cetaceans.
Izinsalela zamathambo zatholwa cishe ngamamayela angu-0.6 (ikhilomitha elilodwa) phakathi nezwe ukusuka ogwini lwasePeru lwasePacific, ePlaya Media Luna.
Ama-mandibles akhona ayedla inhlabathi yasogwadule futhi ngesikhathi kumbiwa, abacwaningi bathola umhlathi ongezansi, amazinyo, ama-vertebrae, izimbambo, izingxenye zemilenze yangaphambili nengemuva, ngisho neminwe emide yokhokho womkhomo okungenzeka ukuthi yayinezintambo.
Ngokusekelwe kukwakheka kwayo, ososayensi bafinyelela esiphethweni sokuthi le cetacean engamafidi angaba ngu-13 (amamitha amane) ubude ingahamba futhi ibhukude.
Ngokomlobi oholayo u-Olivier Lambert we-Royal Belgian Institute of Natural Sciences, “ingxenye yomgogodla womsila yabonisa ukufana nezilwane ezincelisayo zanamuhla ezihlala kancane emanzini njengama-otter.”
"Ngakho-ke lesi bekungaba isilwane ebesizoqala ukusebenzisa umsila waso ukubhukuda, okusihlukanisa namacetaceans amadala eNdiya nasePakistan," kusho uLambert.
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Izingcezu zemikhoma ezinemilenze emine ngaphambilini zatholakala e-Egypt, Nigeria, Togo, Senegal naseWestern Sahara, kodwa zazihlukene kangangokuthi kwakungenakwenzeka ukuphetha ngokuthi zingakwazi yini ukubhukuda.
“Lesi isibonelo esiphelele kunazo zonke esake satholwa somkhomo onemilenze emine ngaphandle kwaseNdiya nasePakistan,” kusho uLambert.
Uma umkhomo wasePeru ukwazi ukubhukuda njenge-otter, abacwaningi bacabanga ukuthi kungenzeka wawela i-Atlantic usuka ogwini olusentshonalanga ye-Afrika waya eNingizimu Melika. Njengomphumela we-continental drift, ibanga libe yingxenye yanamuhla, cishe amamayela angu-800, futhi umsinga wasempumalanga-ntshonalanga wesikhathi wawuzokwenza uhambo lwabo lube lula.
Lokhu okutholakele kungenza kube lula ukuthi kube nenye inkolelo-mbono yokuthi imikhomo yafinyelela eNyakatho Melika ngeGreenland.
I-Pisco Basin, ogwini oluseningizimu yePeru, cishe inamathambo amaningi, uma kubhekwa izimo zayo ezinhle kakhulu zokulondolozwa. Izazi ze-paleontology zicabanga ukuthi “zinomsebenzi okungenani iminyaka engu-50 ezayo.”
Le ndaba ayizange ihlelwe ngu MRU.INK abasebenzi futhi ikhiqizwa ngokuzenzakalelayo ngokuphakelayo okuthengiswayo.
