{"id":46,"date":"2026-02-08T00:42:29","date_gmt":"2026-02-08T00:42:29","guid":{"rendered":"https:\/\/www.lifescienceart.com\/cs\/?p=46"},"modified":"2026-02-08T00:42:29","modified_gmt":"2026-02-08T00:42:29","slug":"linhenykus-the-unique-one-fingered-dinosaur","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/cs\/science\/paleontology\/linhenykus-the-unique-one-fingered-dinosaur\/","title":{"rendered":"Linhenykus: jednoprst\u00fd dinosaurus, kter\u00fd vyd\u011bsil v\u011bdce"},"content":{"rendered":"

Linhenykus: Jedine\u010dn\u00fd dinosaurus s jedn\u00edm prstem<\/h2>\n\n

Objev a popis<\/h2>\n\n

V roce 1993 paleontologov\u00e9 odkryli Mononyka, podivn\u00e9ho dinosaura, kter\u00fd vyz\u00fdval jejich ch\u00e1p\u00e1n\u00ed anatomie dinosaur\u016f. Mononykus m\u011bl \u0161t\u00edhlou stavbu jako p\u0161tros\u00ed dinosau\u0159i, ale vykazoval z\u0159eteln\u00e9 znaky v\u010detn\u011b kr\u00e1tk\u00fdch rukou s jedin\u00fdm dr\u00e1pem. Tyto rysy ho za\u0159adily do nov\u00e9 skupiny zvan\u00e9 alvarezsau\u0159i.<\/p>\n\n

Od t\u00e9 doby bylo objeveno mnoho druh\u016f alvarezsaur\u016f. Nejnov\u011bj\u0161\u00edm p\u0159\u00edr\u016fstkem je Linhenykus monodactylus, pojmenovan\u00fd podle sv\u00e9 jedine\u010dn\u00e9 stavby. Jeho \u010d\u00e1ste\u010dn\u00e1 kostra nalezen\u00e1 v Vnit\u0159n\u00edm Mongolsku poch\u00e1z\u00ed z obdob\u00ed p\u0159ed 84 a\u017e 75 miliony let. Navzdory sv\u00e9 mal\u00e9 velikosti se Linhenykus vyzna\u010duje mohutn\u011b stav\u011bn\u00fdmi p\u0159edn\u00edmi kon\u010detinami.<\/p>\n\n

Adaptace jedn\u00edm prstem<\/h2>\n\n

Na rozd\u00edl od ostatn\u00edch alvarezsaur\u016f, kter\u00e9 m\u011bly krom\u011b hlavn\u00edho prstu je\u0161t\u011b drobn\u00e9 zbytkov\u00e9 prsty, m\u011bl Linhenykus pouze jedin\u00fd funk\u010dn\u00ed prst. Tento jedin\u00fd, robustn\u00ed \u010dl\u00e1nek byl zakon\u010den siln\u00fdm dr\u00e1pem. Absence dal\u0161\u00edch prst\u016f je pozoruhodn\u00e1 specializace, kter\u00e1 Linhenyka odli\u0161uje od jeho p\u0159\u00edbuzn\u00fdch.<\/p>\n\n

Evolu\u010dn\u00ed h\u00e1danka<\/h2>\n\n

Ztr\u00e1ta zbytkov\u00fdch prst\u016f u Linhenyka nen\u00ed v\u00fdsledkem postupn\u00e9 evolu\u010dn\u00ed tendence mezi alvarezsau\u0159\u00edmi. P\u0159edstavuje vzorec mozaikovit\u00e9 evoluce. Linhenykus sd\u00edl\u00ed p\u016fvodn\u00ed znaky s ran\u00fdmi alvarezsau\u0159\u00edmi, ale z\u00e1rove\u0148 vykazuje jedine\u010dn\u00e9 specializace, kter\u00e9 nejsou patrn\u00e9 u pozd\u011bj\u0161\u00edch druh\u016f jako Mononykus.<\/p>\n\n

Funkce p\u0159edn\u00edch kon\u010detin a zp\u016fsob krmen\u00ed<\/h2>\n\n

Jedine\u010dn\u00e9 p\u0159edn\u00ed kon\u010detiny alvarezsaur\u016f v\u011bdce dlouho mate. Nej\u010dast\u011bji p\u0159ij\u00edman\u00e1 hypot\u00e9za tvrd\u00ed, \u017ee sv\u00fdmi dr\u00e1py hrabali do hn\u00edzd mravenc\u016f a termit\u016f. Tuto teorii podporuje podobnost jejich dr\u00e1p\u016f s dr\u00e1py modern\u00edch mravene\u010dn\u00edk\u016f a p\u00e1sovc\u016f. P\u0159\u00edm\u00e9 d\u016fkazy o jejich hmyz\u00ed potrav\u011b v\u0161ak dosud nebyly nalezeny.<\/p>\n\n

Archaick\u00e9 a specializovan\u00e9 znaky<\/h2>\n\n

Linhenykus vykazuje jak archaick\u00e9, tak specializovan\u00e9 znaky. Jeho jednoprst\u00e9 p\u0159edn\u00ed kon\u010detiny p\u0159edstavuj\u00ed specializaci, kter\u00e1 nen\u00ed zn\u00e1ma u \u017e\u00e1dn\u00e9ho jin\u00e9ho alvareksaura. Naopak si zachov\u00e1v\u00e1 \u0159adu p\u016fvodn\u00edch rys\u016f, jako je dlouh\u00fd \u0161t\u00edhl\u00fd krk a relativn\u011b primitivn\u00ed lebka. Tento mozaikovit\u00fd vzor evoluce nazna\u010duje slo\u017eitou evolu\u010dn\u00ed historii alvarezsaur\u016f.<\/p>\n\n

Sm\u011bry budouc\u00edho v\u00fdzkumu<\/h2>\n\n

Dal\u0161\u00ed objevy a anal\u00fdzy posv\u00edt\u00ed na evolu\u010dn\u00ed vztahy a chov\u00e1n\u00ed alvarezsaur\u016f. V\u011bdci nad\u00e1le zkoumaj\u00ed p\u016fvod a funkci jejich jedine\u010dn\u00fdch p\u0159edn\u00edch kon\u010detin i jejich ekologickou roli v d\u00e1vn\u00fdch ekosyst\u00e9mech. Objev Linhenyka p\u0159inesl nov\u00e9 poznatky o rozmanitosti a evolu\u010dn\u00ed dynamice t\u00e9to z\u00e1hadn\u00e9 skupiny dinosaur\u016f.<\/p>","protected":false},"excerpt":{"rendered":"

Linhenykus: Jedine\u010dn\u00fd dinosaurus s jedn\u00edm prstem Objev a popis V roce 1993 paleontologov\u00e9 odkryli Mononyka, podivn\u00e9ho dinosaura, kter\u00fd vyz\u00fdval jejich ch\u00e1p\u00e1n\u00ed anatomie dinosaur\u016f. Mononykus m\u011bl \u0161t\u00edhlou stavbu jako p\u0161tros\u00ed dinosau\u0159i,…<\/p>\n","protected":false},"author":2,"featured_media":25293,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[135,134,136,133,137],"class_list":["post-46","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paleontology","tag-alvarezsaurs","tag-dinosaurs","tag-evolution","tag-linhenykus","tag-paleontology"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/46","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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/comments?post=46"}],"version-history":[{"count":2,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/46\/revisions"}],"predecessor-version":[{"id":25294,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/46\/revisions\/25294"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media\/25293"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=46"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=46"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=46"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}