{"id":11280,"date":"2024-05-20T21:36:27","date_gmt":"2024-05-20T21:36:27","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=11280"},"modified":"2024-05-20T21:36:27","modified_gmt":"2024-05-20T21:36:27","slug":"dinosaur-tiny-arms-like-t-rex","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/cs\/science\/paleontology\/dinosaur-tiny-arms-like-t-rex\/","title":{"rendered":"Meraxes gigas: Nov\u00fd objeven\u00fd dinosaurus s miniaturn\u00edma rukama jako T. Rex"},"content":{"rendered":"

Paleontologov\u00e9 Odhaluj\u00ed Nov\u00e9ho Dinosaura S Mali\u010dk\u00fdmi Pa\u017eemi Podobn\u00fdmi T. Rexovi<\/h2>\n\n

Objev a V\u00fdznam<\/h2>\n\n

P\u0159i pr\u016flomov\u00e9m objevu vykopali paleontologov\u00e9 nov\u00fd druh dinosaura pojmenovan\u00e9ho Meraxes gigas. Tento obrovsk\u00fd maso\u017eravec pat\u0159\u00ed do \u010deledi karcharodontosaurid\u016f, stejn\u00e9 skupiny jako ikonick\u00fd Giganotosaurus, kter\u00fd se objevil v ned\u00e1vn\u00e9m filmu Jursk\u00fd sv\u011bt: Nadvl\u00e1da.<\/p>\n\n

Exempl\u00e1\u0159 Meraxes gigas je pozoruhodn\u011b kompletn\u00ed a poskytuje cenn\u00e9 poznatky o anatomii a evoluci t\u011bchto prav\u011bk\u00fdch pred\u00e1tor\u016f. Jeho dob\u0159e zachovan\u00e1 lebka a t\u00e9m\u011b\u0159 kompletn\u00ed kon\u010detiny, v\u010detn\u011b kr\u00e1tk\u00fdch p\u0159edn\u00edch kon\u010detin, vrhaj\u00ed sv\u011btlo na jedine\u010dn\u00e9 adaptace karcharodontosaurid\u016f.<\/p>\n\n

Srovn\u00e1vac\u00ed Anatomie: Meraxes vs. Tyranosau\u0159i<\/h2>\n\n

Meraxes gigas vykazuje n\u00e1padn\u00e9 podobnosti se slavn\u00fdm Tyrannosaurem rexem, zejm\u00e9na ve sv\u00fdch drobn\u00fdch pa\u017e\u00edch. Cel\u00e1 pa\u017ee Meraxe je m\u00e9n\u011b ne\u017e polovi\u010dn\u00ed d\u00e9lky jeho stehenn\u00ed kosti, co\u017e je pom\u011br srovnateln\u00fd s pom\u011brem Tarbosaura, bl\u00edzk\u00e9ho p\u0159\u00edbuzn\u00e9ho T. rexe.<\/p>\n\n

Tento objev nazna\u010duje, \u017ee evoluce kr\u00e1tk\u00fdch pa\u017e\u00ed mohla b\u00fdt sd\u00edlenou odpov\u011bd\u00ed mezi velk\u00fdmi teropodn\u00edmi dinosaury, bez ohledu na jejich rodinnou p\u0159\u00edslu\u0161nost. Tyranosau\u0159i a karcharodontosau\u0159i, p\u0159esto\u017ee se vyv\u00edjeli na r\u016fzn\u00fdch polokoul\u00edch, oba vyvinuli kr\u00e1tk\u00e9 pa\u017ee.<\/p>\n\n

Funkce P\u0159edn\u00edch Kon\u010detin U Velk\u00fdch Maso\u017eravc\u016f<\/h2>\n\n

Ot\u00e1zka, pro\u010d velc\u00ed maso\u017erav\u00ed dinosau\u0159i jako Meraxes a Tyrannosaurus rex vyvinuli kr\u00e1tk\u00e9 pa\u017ee, ji\u017e dlouho mate paleontology. V\u00fdzkumn\u00edci na\u0161li korelaci mezi velikost\u00ed lebky a d\u00e9lkou pa\u017e\u00ed u n\u011bkter\u00fdch teropodn\u00edch skupin. Dinosau\u0159i s v\u011bt\u0161\u00edmi lebkami m\u011bli tendenci m\u00edt krat\u0161\u00ed pa\u017ee.<\/p>\n\n

To nazna\u010duje, \u017ee tito dinosau\u0159i se p\u0159i chyt\u00e1n\u00ed ko\u0159isti spol\u00e9hali p\u0159edev\u0161\u00edm na sv\u00e1 siln\u00e1 kousnut\u00ed, nikoli na pou\u017e\u00edv\u00e1n\u00ed sv\u00fdch pa\u017e\u00ed k uchopen\u00ed nebo dr\u017een\u00ed. Kr\u00e1tk\u00e9 pa\u017ee mohly b\u00fdt adaptac\u00ed, kter\u00e1 jim br\u00e1nila ve zran\u011bn\u00ed b\u011bhem siln\u00fdch kousnut\u00ed.<\/p>\n\n

Evoluce Redukce Pa\u017e\u00ed U Karcharodontosaurid\u016f<\/h2>\n\n

D\u0159\u00edv\u011bj\u0161\u00ed karcharodontosau\u0159i, jako Acrocanthosaurus, m\u011bli del\u0161\u00ed p\u0159edn\u00ed kon\u010detiny. Pozd\u011bj\u0161\u00ed \u010dlenov\u00e9 skupiny, v\u010detn\u011b Meraxe, v\u0161ak vyvinuli mnohem krat\u0161\u00ed kon\u010detiny. Toto postupn\u00e9 sni\u017eov\u00e1n\u00ed d\u00e9lky pa\u017e\u00ed v pr\u016fb\u011bhu \u010dasu nazna\u010duje, \u017ee v\u00fdhody vypl\u00fdvaj\u00edc\u00ed z kr\u00e1tk\u00fdch pa\u017e\u00ed p\u0159ev\u00e1\u017eily pot\u0159ebu del\u0161\u00edch, v\u00edce funk\u010dn\u00edch p\u0159edn\u00edch kon\u010detin.<\/p>\n\n

Z\u00e1hada Pa\u017e\u00ed<\/h2>\n\n

Zat\u00edmco kr\u00e1tk\u00e9 pa\u017ee Meraxe a velk\u00fdch tyranosaurid\u016f byly pravd\u011bpodobn\u011b adaptac\u00ed na jejich styl lovu, p\u0159esn\u00e1 funkce t\u011bchto p\u0159\u00edv\u011bsk\u016f z\u016fst\u00e1v\u00e1 z\u00e1hadou. V\u00fdzkumn\u00edci na\u0161li d\u016fkazy, \u017ee tyto p\u0159edn\u00ed kon\u010detiny nebyly zcela nefunk\u010dn\u00ed, proto\u017ee si zachovaly svaly.<\/p>\n\n

Ot\u00e1zka, k \u010demu tito velc\u00ed maso\u017erav\u00ed dinosau\u0159i pou\u017e\u00edvali sv\u00e9 kr\u00e1tk\u00e9 pa\u017ee, je p\u0159edm\u011btem prob\u00edhaj\u00edc\u00edho v\u00fdzkumu. Je mo\u017en\u00e9, \u017ee hr\u00e1ly roli p\u0159i p\u00e1\u0159en\u00ed, komunikaci nebo jin\u00e9m chov\u00e1n\u00ed, kter\u00e9 nen\u00ed pln\u011b pochopeno.<\/p>\n\n

Z\u00e1v\u011br<\/h2>\n\n

Objev Meraxe gigase poskytl paleontolog\u016fm mnoho nov\u00fdch informac\u00ed o anatomii a evoluci karcharodontosaurid\u016f. Jedine\u010dn\u00e1 kombinace velk\u00e9 lebky a kr\u00e1tk\u00fdch pa\u017e\u00ed u tohoto dinosaura zd\u016fraz\u0148uje pozoruhodnou rozmanitost a adaptace teropodn\u00edch dinosaur\u016f.<\/p>\n\n

Dal\u0161\u00ed v\u00fdzkum Meraxe a dal\u0161\u00edch p\u0159\u00edbuzn\u00fdch druh\u016f bude i nad\u00e1le osv\u011btlovat tajemstv\u00ed redukce pa\u017e\u00ed u dinosaur\u016f a slo\u017eit\u00e9 evolu\u010dn\u00ed vztahy mezi t\u011bmito prav\u011bk\u00fdmi pred\u00e1tory.<\/p>","protected":false},"excerpt":{"rendered":"

Paleontologov\u00e9 Odhaluj\u00ed Nov\u00e9ho Dinosaura S Mali\u010dk\u00fdmi Pa\u017eemi Podobn\u00fdmi T. Rexovi Objev a V\u00fdznam P\u0159i pr\u016flomov\u00e9m objevu vykopali paleontologov\u00e9 nov\u00fd druh dinosaura pojmenovan\u00e9ho Meraxes gigas. Tento obrovsk\u00fd maso\u017eravec pat\u0159\u00ed do \u010deledi…<\/p>\n","protected":false},"author":6,"featured_media":23388,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[15269,2704,136,137,15270,5677,664],"class_list":["post-11280","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paleontology","tag-carcharodontosaurus","tag-dinosaur","tag-evolution","tag-paleontology","tag-comparative-anatomy","tag-theropod","tag-tyrannosaurus-rex"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/11280","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\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=11280"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/11280\/revisions"}],"predecessor-version":[{"id":11281,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/11280\/revisions\/11281"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media\/23388"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=11280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=11280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=11280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}