V hlubin\u00e1ch d\u00e1vn\u00fdch mo\u0159\u00ed na\u0161\u00ed Zem\u011b, p\u0159ibli\u017en\u011b p\u0159ed 500 miliony let, se skr\u00fdval d\u011bsiv\u00fd \u010dlenovec zn\u00e1m\u00fd jako Lyrarapax unguispinus, kter\u00fd lovil nic netu\u0161\u00edc\u00ed tvory. Se svou impozantn\u00ed velikost\u00ed, p\u0159esahuj\u00edc\u00ed d\u00e9lku t\u0159\u00ed stop, a se svou impozantn\u00ed dr\u00e1povitou kon\u010detinou byl L. unguispinus ob\u00e1van\u00fdm pred\u00e1torem.<\/p>\n\n
Ned\u00e1vn\u00e9 objevy v\u0161ak odhalily, \u017ee i mlad\u00ed jedinci Lyrarapax unguispinus byli schopn\u00fdmi zabij\u00e1ky. V\u00fdborn\u011b zachoval\u00fd fosiln\u00ed exempl\u00e1\u0159 mlad\u00e9ho jedince L. unguispinus, nalezen\u00fd v \u010d\u00ednsk\u00e9 provincii Yunnan, n\u00e1m poskytl cenn\u00e9 poznatky o pred\u00e1torsk\u00fdch schopnostech t\u011bchto prav\u011bk\u00fdch tvor\u016f.<\/p>\n\n
Navzdory sv\u00e9 mal\u00e9 velikosti vykazoval mlad\u00fd fosiln\u00ed exempl\u00e1\u0159 pozoruhodn\u00e9 podobnosti se sv\u00fdmi dosp\u011bl\u00fdmi prot\u011bj\u0161ky. M\u011bl ostnatou dravou kon\u010detinu k uchopen\u00ed ko\u0159isti a kruhovitou tlamu lemovanou ostr\u00fdmi, vroubkovan\u00fdmi zuby. Tyto znaky nazna\u010duj\u00ed, \u017ee mlad\u00ed jedinci L. unguispinus byli dob\u0159e vybaveni k tomu, aby lovili a po\u017e\u00edraly ko\u0159ist ji\u017e od \u00fatl\u00e9ho v\u011bku.<\/p>\n\n
Objev fosiln\u00edho exempl\u00e1\u0159e mlad\u00e9ho jedince L. unguispinus m\u00e1 v\u00fdznamn\u00e9 d\u016fsledky pro na\u0161e ch\u00e1p\u00e1n\u00ed kambrick\u00e9 exploze, obdob\u00ed rychl\u00e9 diverzifikace a \u0161\u00ed\u0159en\u00ed druh\u016f, ke kter\u00e9mu do\u0161lo asi p\u0159ed 542 miliony let.<\/p>\n\n
P\u0159ed kambrickou exploz\u00ed obsahovaly zemsk\u00e9 oce\u00e1ny pom\u011brn\u011b n\u00edzkou hladinu kysl\u00edku, co\u017e omezovalo p\u0159e\u017eit\u00ed slo\u017eit\u00fdch \u017eivo\u010dich\u016f. Nicm\u00e9n\u011b m\u00edrn\u00e9 zv\u00fd\u0161en\u00ed hladiny kysl\u00edku mohlo umo\u017enit pred\u00e1tor\u016fm, jako byl L. unguispinus, prosperovat a vyvolat \u201eevolu\u010dn\u00ed z\u00e1vody ve zbrojen\u00ed\u201c.<\/p>\n\n
Jako vrcholov\u00ed pred\u00e1to\u0159i vyv\u00edjeli dosp\u011bl\u00ed jedinci L. unguispinus zna\u010dn\u00fd tlak na ostatn\u00ed organismy, co\u017e vedlo k v\u00fdvoji obrann\u00fdch znak\u016f, jako jsou exoskelety a ochrann\u00e9 schr\u00e1nky. Objev fosiln\u00edho exempl\u00e1\u0159e mlad\u00e9ho jedince nazna\u010duje, \u017ee dokonce i ml\u00e1\u010fata druhu L. unguispinus hr\u00e1la kl\u00ed\u010dovou roli v t\u011bchto evolu\u010dn\u00edch z\u00e1vodech ve zbrojen\u00ed a vyv\u00edjela dal\u0161\u00ed selek\u010dn\u00ed tlak na men\u0161\u00ed druhy ko\u0159isti, aby si vyvinuly adaptace pro p\u0159e\u017eit\u00ed.<\/p>\n\n
Pred\u00e1torsk\u00e9 chov\u00e1n\u00ed mlad\u00fdch jedinc\u016f Lyrarapax unguispinus vykazuje n\u00e1padn\u00e9 podobnosti s modern\u00edmi \u010dlenovci, jako jsou kudlanky a pavouci, kte\u0159\u00ed jsou tak\u00e9 dob\u0159e vyvinut\u00fdmi pred\u00e1tory ji\u017e od \u00fatl\u00e9ho v\u011bku. To nazna\u010duje, \u017ee ur\u010dit\u00e9 pred\u00e1torsk\u00e9 rysy se mohly vyvinout ji\u017e v ran\u00e9 historii \u010dlenovc\u016f a byly zachov\u00e1ny v pr\u016fb\u011bhu jejich evolu\u010dn\u00ed historie.<\/p>\n\n
Objev fosiln\u00edho exempl\u00e1\u0159e mlad\u00e9ho jedince Lyrarapax unguispinus poskytl cenn\u00e9 poznatky o pred\u00e1torsk\u00fdch schopnostech t\u011bchto prav\u011bk\u00fdch tvor\u016f a jejich roli v kambrick\u00e9 explozi. Zd\u016fraz\u0148uje d\u016fle\u017eitost mlad\u00fdch pred\u00e1tor\u016f p\u0159i utv\u00e1\u0159en\u00ed evoluce ekosyst\u00e9m\u016f a poukazuje na pozoruhodn\u00e9 adaptace, kter\u00e9 se vyvinuly v pr\u016fb\u011bhu milion\u016f let, aby zajistily p\u0159e\u017eit\u00ed v konkuren\u010dn\u00edm a neust\u00e1le se m\u011bn\u00edc\u00edm prost\u0159ed\u00ed.<\/p>","protected":false},"excerpt":{"rendered":"
Lyrarapax unguispinus: Mlad\u00ed vra\u017eedn\u00ed tvorov\u00e9 kambrick\u00e9 exploze Objev mlad\u00e9ho fosiln\u00edho exempl\u00e1\u0159e odhaluje pokro\u010dil\u00e9 pred\u00e1torsk\u00e9 vlastnosti V hlubin\u00e1ch d\u00e1vn\u00fdch mo\u0159\u00ed na\u0161\u00ed Zem\u011b, p\u0159ibli\u017en\u011b p\u0159ed 500 miliony let, se skr\u00fdval d\u011bsiv\u00fd \u010dlenovec…<\/p>\n","protected":false},"author":6,"featured_media":23931,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[7051,7050,7049,7048,137],"class_list":["post-3764","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paleontology","tag-evolutionary-arms-race","tag-juvenile-predators","tag-cambrian-explosion","tag-lyrarapax-unguispinus","tag-paleontology"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/3764","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=3764"}],"version-history":[{"count":1,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/3764\/revisions"}],"predecessor-version":[{"id":3765,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/posts\/3764\/revisions\/3765"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media\/23931"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/media?parent=3764"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/categories?post=3764"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/cs\/wp-json\/wp\/v2\/tags?post=3764"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}