{"id":1280,"date":"2021-07-09T10:34:07","date_gmt":"2021-07-09T10:34:07","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=1280"},"modified":"2021-07-09T10:34:07","modified_gmt":"2021-07-09T10:34:07","slug":"nedoceratops-paleontological-puzzle","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/cs\/science\/paleontology\/nedoceratops-paleontological-puzzle\/","title":{"rendered":"Nedoceratops: Paleontologick\u00e1 z\u00e1hada"},"content":{"rendered":"

Nedoceratops: Paleontologick\u00e1 z\u00e1hada<\/h2>\n\n

Taxonomie a ontogeneze<\/h2>\n\n

Debata o tom, zda Nedoceratops, Triceratops a Torosaurus p\u0159edstavuj\u00ed samostatn\u00e9 druhy nebo r\u016fzn\u00e1 st\u00e1dia r\u016fstu stejn\u00e9ho dinosaura, trv\u00e1 u\u017e v\u00edce ne\u017e stolet\u00ed. Ned\u00e1vn\u00e9 v\u00fdzkumy o\u017eivily z\u00e1jem o ontogenezi (r\u016fst a v\u00fdvoj) ceratopsidn\u00edch dinosaur\u016f.<\/p>\n\n

Nedoceratops: P\u0159echodov\u00e1 forma?<\/h2>\n\n

Nedoceratops je zn\u00e1m\u00fd pouze z jedin\u00e9 lebky, kter\u00e1 vykazuje kombinaci znak\u016f pozorovan\u00fdch u Triceratops i Torosaura. N\u011bkte\u0159\u00ed v\u011bdci tvrd\u00ed, \u017ee to nazna\u010duje, \u017ee Nedoceratops p\u0159edstavuje p\u0159echodovou formu mezi t\u011bmito dv\u011bma druhy. Konkr\u00e9tn\u011b je p\u0159\u00edtomnost mal\u00e9ho otvoru v temenn\u00ed kosti l\u00edmce interpretov\u00e1na jako ran\u00e9 st\u00e1dium v\u011bt\u0161\u00edch otvor\u016f pozorovan\u00fdch u Torosaura.<\/p>\n\n

Kritika hypot\u00e9zy r\u016fstov\u00e9 \u0159ady<\/h2>\n\n

Jin\u00ed v\u011bdci v\u0161ak tuto interpretaci zpochybnili s t\u00edm, \u017ee znaky Nedoceratopse spadaj\u00ed do rozsahu variability pozorovan\u00e9 u Triceratopse. Nav\u00edc p\u0159\u00edtomnost nosn\u00edho rohu u Triceratopse, kter\u00fd u Nedoceratopse chyb\u00ed, vyvol\u00e1v\u00e1 ot\u00e1zky ohledn\u011b navrhovan\u00e9 r\u016fstov\u00e9 \u0159ady.<\/p>\n\n

Epiossifikace a r\u016fst<\/h2>\n\n

Jedn\u00edm z kl\u00ed\u010dov\u00fdch aspekt\u016f debaty je po\u010det epiossifikac\u00ed (kost\u011bn\u00fdch ozdob) kolem okraje ceratopsidn\u00edho l\u00edmce. Triceratops m\u00e1 obvykle p\u011bt nebo \u0161est epiossifikac\u00ed, zat\u00edmco u Torosaura jich bylo nalezeno 10 a\u017e 12. Pokud Nedoceratops p\u0159edstavuje p\u0159echodovou formu, vy\u017eadovalo by to n\u00e1r\u016fst po\u010dtu epiossifikac\u00ed b\u011bhem r\u016fstu.<\/p>\n\n

Individu\u00e1ln\u00ed variace a zm\u011bny zalo\u017een\u00e9 na vrstv\u00e1ch<\/h2>\n\n

Ned\u00e1vn\u00e9 n\u00e1lezy v\u0161ak nazna\u010duj\u00ed, \u017ee individu\u00e1ln\u00ed variace a zm\u011bny v pr\u016fb\u011bhu \u010dasu mohou komplikovat pou\u017e\u00edv\u00e1n\u00ed po\u010dtu epiossifikac\u00ed pro identifikaci druh\u016f. V\u011bdci pozorovali variaci v po\u010dtu a um\u00edst\u011bn\u00ed epiossifikac\u00ed u exempl\u00e1\u0159\u016f Triceratopse z r\u016fzn\u00fdch stratigrafick\u00fdch \u00farovn\u00ed, co\u017e nazna\u010duje, \u017ee tyto znaky mohou b\u00fdt ovlivn\u011bny jak r\u016fstem, tak environment\u00e1ln\u00edmi faktory.<\/p>\n\n

Implikace pro identifikaci dinosaur\u016f<\/h2>\n\n

Debata o Nedoceratopsovi a Triceratopsovi\/Torosaurovi zd\u016fraz\u0148uje v\u00fdzvy spojen\u00e9 s identifikac\u00ed druh\u016f dinosaur\u016f na z\u00e1klad\u011b ne\u00fapln\u00fdch nebo fragment\u00e1rn\u00edch exempl\u00e1\u0159\u016f. Jak paleontologov\u00e9 zji\u0161\u0165uj\u00ed v\u00edce o ontogenetick\u00fdch zm\u011bn\u00e1ch a individu\u00e1ln\u00ed variaci u dinosaur\u016f, mus\u00ed pe\u010dliv\u011b vyhodnotit, kter\u00e9 skelet\u00e1ln\u00ed znaky jsou taxonomicky nejv\u00edce vypov\u00eddaj\u00edc\u00ed. Tento prob\u00edhaj\u00edc\u00ed v\u00fdzkum je z\u00e1sadn\u00ed pro pochopen\u00ed rozmanitosti a evoluce prehistorick\u00e9ho \u017eivota.<\/p>\n\n

Nevy\u0159e\u0161en\u00e9 ot\u00e1zky<\/h2>\n\n

P\u0159es pokrok dosa\u017een\u00fd v porozum\u011bn\u00ed r\u016fstu a taxonomie ceratopsid\u016f z\u016fst\u00e1v\u00e1 mnoho nezodpov\u011bzen\u00fdch ot\u00e1zek. K \u00fapln\u00e9mu objasn\u011bn\u00ed vztah\u016f mezi Nedoceratopsem, Triceratopsem a Torosaurem jsou zapot\u0159eb\u00ed dal\u0161\u00ed objevy fosili\u00ed, v\u010detn\u011b juveniln\u00edch a intermedi\u00e1ln\u00edch exempl\u00e1\u0159\u016f. Paleontologov\u00e9 nad\u00e1le zkoumaj\u00ed tajemstv\u00ed t\u011bchto prav\u011bk\u00fdch tvor\u016f a osv\u011btluj\u00ed slo\u017eitost evoluce dinosaur\u016f a dynamickou povahu prehistorick\u00fdch ekosyst\u00e9m\u016f.<\/p>","protected":false},"excerpt":{"rendered":"

Nedoceratops: Paleontologick\u00e1 z\u00e1hada Taxonomie a ontogeneze Debata o tom, zda Nedoceratops, Triceratops a Torosaurus p\u0159edstavuj\u00ed samostatn\u00e9 druhy nebo r\u016fzn\u00e1 st\u00e1dia r\u016fstu stejn\u00e9ho dinosaura, trv\u00e1 u\u017e v\u00edce ne\u017e stolet\u00ed. Ned\u00e1vn\u00e9 v\u00fdzkumy…<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[2902,134,136,2900,2903,137,2727,2901,2701],"class_list":["post-1280","post","type-post","status-publish","format-standard","hentry","category-paleontology","tag-ceratopsids","tag-dinosaurs","tag-evolution","tag-nedoceratops","tag-ontogeny","tag-paleontology","tag-taxonomy","tag-torosaurus","tag-triceratops"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/1280","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=1280"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/1280\/revisions"}],"predecessor-version":[{"id":1281,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/1280\/revisions\/1281"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=1280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=1280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=1280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}