Twiza dzaisagara dzine mitsipa mirefu, asi nguva dzose dzaifarira nzvimbo dzemusoro-kune-zvigunwe.
Twiza dzaisagara dziine mitsipa mirefu, asi dzaigara dzichida kurova musoro kuti dzirambe dzakamira. Uchapupu hweizvi ndiko kuwanikwa kwefossil specimen yetwiza, yakapiwa chaiyo "nhoo yedehenya", AFP yakashuma, ichidudza chinyorwa mumagazini inonzi Science.
Kuwana kunotsigira dzidziso yokuti simba rekutanga rekufambisa kwemutsipa mumhuka idzi kwaiva kusarudzwa kwepabonde.
Yakawanikwa kuchamhembe kweChina, Discokeryx xiezhi ndiyo mhando itsva yekutanga kurarama makore mamirioni gumi nemanomwe apfuura.
Mhuka yekare, yakakura semhembwe hombe, yaive nedhisiki gobvu rebhonzo pamusoro pedehenya rayo nemutsipa nemutsipa wechibereko unoshamisa izvo zvaiita kuti irambe ichirohwa zvakasimba pamberi, maererano nenyanzvi yepaleontologist Shu-Qi Wang weChinese Academy of Sciences. , munyori mukuru. chinyorwa.
Iyi "special morphology" ingangove yakagadziridzwa kuita musoro-kune-musoro maitiro pakati pevarume, vaongorori vakakurudzira. Vanoenzanisa mufambiro wemhuka dzekare ne“pendi yemitsipa” yetwiza hono yemazuva ano, idzo dzinorwira ukuru, dzichizunguza misoro yadzo nenyanga duku nesimba radzo rose mukurwisana nevadzivisi vadzo.
Kuwanikwa kweChinese paleontologists kunotora basa rakakosha mugakava rekare sepaleontology pachayo: sei twiza ine mutsipa wakareba kudaro?
Paleontologists vagara vachidzivirira thesis of ecological advantage, maererano neiyi mutsipa wakareba unopa muridzi wayo mukana wakajeka mukusvika kumashizha akakwirira emiti. Maererano neimwe dzidziso ichangoburwa uye inokakavadzana, mutsipa wakareba uye une simba unokanganisa mhedzisiro yekurwa kwevarume uye nekudaro inofarira kukura kwayo.
Tsvakurudzo yaShu-Qi Wang nevamwe vake inotsigira thesis yekupedzisira: rudzi urwu rwehondo pamwe ndicho chikonzero chekutanga nei twiza dzine mitsipa mirefu. Zvakadaro, kutora uku kwakavapa mukana wekukwanisa kufudza mashizha akakwirira.
“Uyu muenzaniso wakakwana wo‘kukudza’, kureva kuti chinhu chinopiwa nenhengo inozoshanda kune mamwe mashandisiro gare gare,” anotsanangura kudaro Gregoire Mete, nyanzvi yezvakaitika kare paNational Museum of Natural History muParis, uyo akagamuchira “kutsvakurudza kwakanakisisa. ”. “.
Maererano naye, twiza dzakatanga "nhangemutange" yemutsipa wakareba uye une simba. Izvi zvinoratidza zvakare kuti kukwikwidzana kwepabonde ndeimwe yekufambisa kwemasimba ekushanduka-shanduka, zvichiita kuti morphological innovations inogona kushandiswa kune zvimwe zvinangwa.
Panyaya yeDiscokeryx xiezhi, iyo morphology yezvipenyu ndiyo yakanyanya kuchinjika yehondo-kune-musoro hondo kana ichienzaniswa nemhando dzemazuva ano dzinoita tsika iyi.
Iyi morphology yakapa Discoveryx xiezhi kugona kusingaenzaniswi kutora simba rekurova uye kuchengetedza huropi hwayo.
Asi sei Discoveryx xiezhi isina kuwanawo mutsipa wakareba? Chekutanga, nekuti mhuka dzaisaida: dzakasangana nechiitiko chinoshamisa cheMiocene, panguva iyo mamiriro ekunze aidziya uye izvi zvakabvumira kuti ifudze kuguta. Uye chechipiri, nokuti uku kunongova kutanga kwenhoroondo yetwiza uye iyo yekukura kwemitsipa yadzo mirefu.
