{"id":12156,"date":"2023-03-04T09:08:15","date_gmt":"2023-03-04T09:08:15","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=12156"},"modified":"2023-03-04T09:08:15","modified_gmt":"2023-03-04T09:08:15","slug":"discovery-of-raptor-like-dinosaur-hesperornithoides-miessleri-sheds-light-on-bird-evolution","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/cs\/science\/paleontology\/discovery-of-raptor-like-dinosaur-hesperornithoides-miessleri-sheds-light-on-bird-evolution\/","title":{"rendered":"Objev dinosaura podobn\u00e9ho dravci vrh\u00e1 sv\u011btlo na v\u00fdvoj pt\u00e1k\u016f"},"content":{"rendered":"

Objev dinosaura podobn\u00e9ho dravci vrh\u00e1 sv\u011btlo na evoluci pt\u00e1k\u016f<\/h2>\n\n

Nov\u00fd prav\u011bk\u00fd pred\u00e1tor<\/h2>\n\n

V rozlehl\u00fdch krajin\u00e1ch Wyomingu odhalili paleontologov\u00e9 pozoruhodn\u00fd objev: mal\u00e9ho dinosaura podobn\u00e9ho dravci, kter\u00fd dostal jm\u00e9no Hesperornithoides miessleri. Tento tvor star\u00fd 150 milion\u016f let uchv\u00e1til v\u011bdce a poskytl nov\u00e9 poznatky o evolu\u010dn\u00ed cest\u011b od dinosaur\u016f k pt\u00e1k\u016fm.<\/p>\n\n

Operen\u00fd dinosaurus s pta\u010d\u00edmi znaky<\/h2>\n\n

Hesperornithoides miessleri byl operen\u00fd dinosaurus s mnoha znaky spojen\u00fdmi s pt\u00e1ky. Jeho zahnut\u00e1 vidlice, polom\u011bs\u00ed\u010dit\u00e1 z\u00e1p\u011bstn\u00ed k\u016fstka a dal\u0161\u00ed kostern\u00ed adaptace nazna\u010duj\u00ed, \u017ee m\u011bl potenci\u00e1l k letu nebo alespo\u0148 k pta\u010d\u00edm man\u00e9vr\u016fm ve vzduchu.<\/p>\n\n

Bl\u00edzk\u00fd p\u0159\u00edbuzn\u00fd troodontid\u016f a velociraptor\u016f<\/h2>\n\n

Hesperornithoides miessleri pat\u0159\u00ed do skupiny dinosaur\u016f zn\u00e1m\u00fdch jako troodontidi, kte\u0159\u00ed byli \u00fazce p\u0159\u00edbuzn\u00ed slavn\u011bj\u0161\u00edmu velociraptorovi. Tito mal\u00ed, srpovit\u00fdmi dr\u00e1py ozbrojen\u00ed dinosau\u0159i byli obratn\u00ed pred\u00e1to\u0159i, kte\u0159\u00ed ob\u00fdvali Zemi v obdob\u00ed jury.<\/p>\n\n

Evolu\u010dn\u00ed spojen\u00ed s pt\u00e1ky<\/h2>\n\n

Objev Hesperornithoides miessleri znovu rozdm\u00fdchal debaty o p\u016fvodu pt\u00e1k\u016f. A\u010dkoli nen\u00ed pova\u017eov\u00e1n za p\u0159\u00edm\u00e9ho p\u0159edka pt\u00e1k\u016f, p\u0159edstavuje bl\u00edzk\u00e9ho p\u0159\u00edbuzn\u00e9ho, kter\u00fd poskytuje cenn\u00e9 stopy o evolu\u010dn\u00edm p\u0159echodu od pozemn\u00edch dinosaur\u016f k l\u00e9taj\u00edc\u00edm pt\u00e1k\u016fm.<\/p>\n\n

B\u011b\u017eec s drav\u010d\u00edm vzhledem, kter\u00fd mohl klouzat<\/h2>\n\n

Na rozd\u00edl od sv\u00fdch pta\u010d\u00edch potomk\u016f byl Hesperornithoides miessleri prim\u00e1rn\u011b suchozemsk\u00e9 zv\u00ed\u0159e. Jeho kostern\u00ed struktura nazna\u010duje, \u017ee to byl rychl\u00fd b\u011b\u017eec, ale mohl m\u00edt omezen\u00e9 schopnosti klouzav\u00e9ho nebo t\u0159epot\u00e1v\u00e9ho letu. To nazna\u010duje, \u017ee se v\u00fdvoj aktivn\u00edho letu u pt\u00e1k\u016f odehr\u00e1val postupn\u011b, p\u0159i\u010dem\u017e pozemn\u00edm adaptac\u00edm p\u0159edch\u00e1zela vzdu\u0161n\u00e1 lokomoce.<\/p>\n\n

Zpochybn\u011bn\u00ed tradi\u010dn\u00edch pohled\u016f na evoluci pt\u00e1k\u016f<\/h2>\n\n

Objev Hesperornithoides miessleri zpochyb\u0148uje tradi\u010dn\u00ed pohledy na evoluci pt\u00e1k\u016f. Ikonick\u00e9 druhy, jako je Archaeopteryx a Microraptor, kter\u00e9 byly kdysi pova\u017eov\u00e1ny za p\u0159\u00edm\u00e9 p\u0159edky pt\u00e1k\u016f, mohou p\u0159edstavovat alternativn\u00ed cesty k letu. Hesperornithoides miessleri nazna\u010duje, \u017ee pt\u00e1ci se vyvinuli nez\u00e1visle na jin\u00fdch dovednostech souvisej\u00edc\u00edch s letem a z dinosaura, kter\u00fd byl sv\u00fdm tvarem bli\u017e\u0161\u00ed jemu samotn\u00e9mu.<\/p>\n\n

Paleontologick\u00fd v\u00fdznam<\/h2>\n\n

Objev Hesperornithoides miessleri je v\u00fdznamn\u00fdm paleontologick\u00fdm n\u00e1lezem. Poskytuje dob\u0159e zachovan\u00fd exempl\u00e1\u0159 ze Severn\u00ed Ameriky, kter\u00fd je \u00fazce p\u0159\u00edbuzn\u00fd s p\u0159edky pt\u00e1k\u016f a poch\u00e1z\u00ed z obdob\u00ed jury. P\u0159isp\u00edv\u00e1 k na\u0161emu ch\u00e1p\u00e1n\u00ed rozmanitosti dinosaur\u016f a komplexn\u00ed evolu\u010dn\u00ed cesty, kter\u00e1 vedla ke vzniku pt\u00e1k\u016f.<\/p>\n\n

Prob\u00edhaj\u00edc\u00ed debata a budouc\u00ed v\u00fdzkum<\/h2>\n\n

P\u0159esn\u00e1 fylogenetick\u00e1 pozice Hesperornithoides miessleri mezi p\u0159\u00edbuzn\u00fdmi pt\u00e1k\u016f se st\u00e1le diskutuje. Budouc\u00ed v\u00fdzkum a anal\u00fdzy mohou vrhnout sv\u011btlo na jeho p\u0159esn\u00fd vztah k jin\u00fdm dinosaur\u016fm a poskytnout dal\u0161\u00ed poznatky o evoluci letu.<\/p>\n\n

Okno do jursk\u00e9ho sv\u011bta<\/h2>\n\n

Hesperornithoides miessleri nab\u00edz\u00ed pohled do jursk\u00e9ho sv\u011bta, doby, kdy dinosau\u0159i vl\u00e1dli Zemi a byly polo\u017eeny evolu\u010dn\u00ed z\u00e1klady pt\u00e1k\u016f. Jeho objev otev\u0159el nov\u00e9 cesty v\u00fdzkumu a vzbudil obnoven\u00fd z\u00e1jem o fascinuj\u00edc\u00ed p\u0159echod od dinosaur\u016f k pt\u00e1k\u016fm.<\/p>","protected":false},"excerpt":{"rendered":"

Objev dinosaura podobn\u00e9ho dravci vrh\u00e1 sv\u011btlo na evoluci pt\u00e1k\u016f Nov\u00fd prav\u011bk\u00fd pred\u00e1tor V rozlehl\u00fdch krajin\u00e1ch Wyomingu odhalili paleontologov\u00e9 pozoruhodn\u00fd objev: mal\u00e9ho dinosaura podobn\u00e9ho dravci, kter\u00fd dostal jm\u00e9no Hesperornithoides miessleri. Tento…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[16426,1381,16425,3256,16427,1064],"class_list":["post-12156","post","type-post","status-publish","format-standard","hentry","category-paleontology","tag-raptor-like-dinosaur","tag-bird-evolution","tag-hesperornithoides-miessleri","tag-jurassic-period","tag-flight","tag-feathers"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12156","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=12156"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12156\/revisions"}],"predecessor-version":[{"id":12157,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/12156\/revisions\/12157"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=12156"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=12156"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=12156"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}