V an\u00e1lech paleontologie se objevil nov\u00fd uchaze\u010d o titul nejt\u011b\u017e\u0161\u00edho zv\u00ed\u0159ete, kter\u00e9 kdy ob\u00fdvalo na\u0161i planetu: Perucetus colossus. Tento kolos\u00e1ln\u00ed vyhynul\u00fd kytovec, kter\u00fd se potuloval v oce\u00e1nech p\u0159ibli\u017en\u011b p\u0159ed 38 miliony let, se odhaduje na ohromuj\u00edc\u00edch 180 metrick\u00fdch tun, co\u017e zasti\u0148uje i mohutnou plejtv\u00e1ka obrovsk\u00e9ho.<\/p>\n\n
Objev Peruceta colossa u\u010dinil t\u00fdm paleontolog\u016f veden\u00fd Giovannim Bianuccim z univerzity v Pise v It\u00e1lii. T\u00fdm odkryl zkamen\u011bl\u00e9 kosti, v\u010detn\u011b 13 obratl\u016f, \u010dty\u0159 \u017eeber a \u010d\u00e1sti p\u00e1nve, z formace Pisco v ji\u017en\u00edm Peru. Tyto kosti byly tak hust\u00e9 a robustn\u00ed, \u017ee si je v\u011bdci zpo\u010d\u00e1tku spletli s kameny.<\/p>\n\n
Na z\u00e1klad\u011b zkamen\u011bl\u00fdch poz\u016fstatk\u016f v\u011bdci odhaduj\u00ed, \u017ee Perucetus colossus m\u011b\u0159il mezi 55 a 66 stopami na d\u00e9lku, co\u017e je o n\u011bco m\u00e9n\u011b ne\u017e modern\u00ed plejtv\u00e1ci obrov\u0161t\u00ed, kte\u0159\u00ed mohou dos\u00e1hnout d\u00e9lky a\u017e 110 stop. Jeho t\u011blo m\u011blo pravd\u011bpodobn\u011b tvar klob\u00e1sy a plaval pomalu t\u00edm, \u017ee vlnil t\u011blem ve vln\u00e1ch.<\/p>\n\n
Jednou z nejv\u00fdrazn\u011bj\u0161\u00edch vlastnost\u00ed Peruceta colossa byly jeho extr\u00e9mn\u011b hust\u00e9 kosti. Tato hustota mu pomohla udr\u017eet svou pozici bl\u00edzko mo\u0159sk\u00e9ho dna p\u0159i krmen\u00ed. Na rozd\u00edl od n\u011bkter\u00fdch velryb, kter\u00e9 p\u0159ed pot\u00e1p\u011bn\u00edm \u00fapln\u011b vypr\u00e1zdn\u00ed pl\u00edce, se Perucetus colossus \u00fadajn\u011b pot\u00e1p\u011bl s trochou vzduchu v plic\u00edch, co\u017e je strategie b\u011b\u017en\u011b pou\u017e\u00edvan\u00e1 obyvateli m\u011blk\u00fdch vod.<\/p>\n\n
Odhad t\u011blesn\u00e9 hmotnosti vyhynul\u00e9ho druhu je n\u00e1ro\u010dn\u00fd \u00fakol. V p\u0159\u00edpad\u011b Peruceta colossa museli v\u011bdci prov\u00e9st kvalifikovan\u00e9 odhady na z\u00e1klad\u011b dostupn\u00fdch zkamen\u011bl\u00fdch poz\u016fstatk\u016f. Proto\u017ee lebka a dal\u0161\u00ed m\u011bkk\u00e9 tk\u00e1n\u011b nebyly zachov\u00e1ny, nemohli p\u0159\u00edmo m\u011b\u0159it velikost hlavy zv\u00ed\u0159ete nebo obsah tuku.<\/p>\n\n
Navzdory t\u011bmto v\u00fdzv\u00e1m je odhad hmotnosti v\u011bdc\u016f 180 metrick\u00fdch tun podpo\u0159en masivn\u00ed velikost\u00ed a hustotou zkamen\u011bl\u00fdch kost\u00ed. Ka\u017ed\u00fd z obratl\u016f velryby v\u00e1\u017eil v\u00edce ne\u017e 200 liber, co\u017e ukazuje na obrovskou velikost cel\u00e9ho zv\u00ed\u0159ete.<\/p>\n\n
Objev Peruceta colossa vzbudil u paleontolog\u016f nad\u0161en\u00ed a zaujet\u00ed. P\u0159edstavuje nov\u00fd druh kosticov\u00e9 velryby, kter\u00e1 \u017eila v obdob\u00ed v\u00fdznamn\u00fdch zm\u011bn \u017eivotn\u00edho prost\u0159ed\u00ed. Skute\u010dnost, \u017ee dos\u00e1hl tak obrovsk\u00e9 velikosti, nazna\u010duje, \u017ee oce\u00e1ny byly v t\u00e9 dob\u011b pln\u00e9 hojn\u00fdch potravinov\u00fdch zdroj\u016f.<\/p>\n\n
Perucetus colossus tak\u00e9 poskytuje vhled do evolu\u010dn\u00ed historie velryb. Jeho hust\u00e9 kosti a jedine\u010dn\u00e9 chov\u00e1n\u00ed p\u0159i pot\u00e1p\u011bn\u00ed nazna\u010duj\u00ed, \u017ee mohl b\u00fdt p\u0159echodnou formou mezi ran\u00fdmi, v\u00edce suchozemsk\u00fdmi velrybami a modern\u00edmi, pln\u011b vodn\u00edmi druhy.<\/p>\n\n
Zat\u00edmco objev Peruceta colossa vrhl sv\u011btlo na rozmanitost a velikost prehistorick\u00fdch velryb, mnoho ot\u00e1zek z\u016fst\u00e1v\u00e1 nezodpov\u011bzeno. V\u011bdci pokra\u010duj\u00ed ve studiu zkamen\u011bl\u00fdch poz\u016fstatk\u016f, aby se dozv\u011bd\u011bli v\u00edce o strav\u011b, chov\u00e1n\u00ed a ekologick\u00e9 nice zv\u00ed\u0159ete. Budouc\u00ed v\u00fdzkum m\u016f\u017ee tak\u00e9 odhalit, zda Perucetus colossus skute\u010dn\u011b sesad\u00ed plejtv\u00e1ka obrovsk\u00e9ho jako nejt\u011b\u017e\u0161\u00ed zv\u00ed\u0159e, kter\u00e9 kdy \u017eilo na Zemi.<\/p>","protected":false},"excerpt":{"rendered":"
Z\u00e1hadn\u00fd Perucetus Colossus: Kandid\u00e1t na nejt\u011b\u017e\u0161\u00ed zv\u00ed\u0159e v\u0161ech dob Objev a popis V an\u00e1lech paleontologie se objevil nov\u00fd uchaze\u010d o titul nejt\u011b\u017e\u0161\u00edho zv\u00ed\u0159ete, kter\u00e9 kdy ob\u00fdvalo na\u0161i planetu: Perucetus colossus.…<\/p>\n","protected":false},"author":2,"featured_media":25151,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[288],"tags":[23532,23531,361,137,23530,2432,23533],"class_list":["post-17961","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-biology","tag-dense-bones","tag-extinct-whales","tag-marine-biology","tag-paleontology","tag-perucetus-colossus","tag-prehistoric-life","tag-unique-diving-behavior"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/17961","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=17961"}],"version-history":[{"count":2,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/17961\/revisions"}],"predecessor-version":[{"id":25152,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/17961\/revisions\/25152"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media\/25151"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=17961"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=17961"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=17961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}