{"id":13436,"date":"2024-09-04T15:29:49","date_gmt":"2024-09-04T15:29:49","guid":{"rendered":"https:\/\/www.lifescienceart.com\/?p=13436"},"modified":"2024-09-04T15:29:49","modified_gmt":"2024-09-04T15:29:49","slug":"new-unadorned-hadrosaur-provides-insights-into-dinosaur-evolution","status":"publish","type":"post","link":"https:\/\/www.lifescienceart.com\/vi\/science\/paleontology\/new-unadorned-hadrosaur-provides-insights-into-dinosaur-evolution\/","title":{"rendered":"Acristavus: M\u1ed9t lo\u00e0i kh\u1ee7ng long m\u1ecf v\u1ecbt m\u1edbi t\u1eeb B\u1eafc M\u1ef9"},"content":{"rendered":"

Acristavus: M\u1ed9t lo\u00e0i kh\u1ee7ng long m\u1ecf v\u1ecbt m\u1edbi t\u1eeb B\u1eafc M\u1ef9<\/h2>\n\n

Kh\u00e1m ph\u00e1 ra Acristavus<\/h2>\n\n

Trong th\u1ebf gi\u1edbi kh\u1ee7ng long, nh\u1eefng c\u1ea5u tr\u00fac k\u1ef3 l\u1ea1 nh\u01b0 c\u00e1nh bu\u1ed3m v\u00e0 s\u1eebng th\u01b0\u1eddng thu h\u00fat s\u1ef1 ch\u00fa \u00fd. Tuy nhi\u00ean, vi\u1ec7c ph\u00e1t hi\u1ec7n ra m\u1ed9t lo\u00e0i kh\u1ee7ng long m\u1ecf v\u1ecbt m\u1edbi, Acristavus gagslarsoni, \u0111\u00e3 t\u1eadp trung s\u1ef1 ch\u00fa \u00fd v\u00e0o m\u1ed9t kh\u00eda c\u1ea1nh kh\u00e1c c\u1ee7a lo\u00e0i \u0111\u1ed9ng v\u1eadt \u0103n c\u1ecf th\u1eddi ti\u1ec1n s\u1eed n\u00e0y: \u0111\u00f3 l\u00e0 ch\u00fang kh\u00f4ng c\u00f3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m trang tr\u00ed.<\/p>\n\n

Acristavus s\u1ed1ng c\u00e1ch \u0111\u00e2y kho\u1ea3ng 79 tri\u1ec7u n\u0103m \u1edf ph\u00eda t\u00e2y B\u1eafc M\u1ef9. H\u00f3a th\u1ea1ch c\u1ee7a ch\u00fang \u0111\u01b0\u1ee3c t\u00ecm th\u1ea5y \u1edf \u0110\u1edbi Two Medicine c\u1ee7a Montana v\u00e0 \u0110\u1edbi Wahweap c\u1ee7a Utah, bao g\u1ed3m c\u1ea3 h\u1ed9p s\u1ecd g\u1ea7n nh\u01b0 ho\u00e0n ch\u1ec9nh v\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n x\u01b0\u01a1ng kh\u00e1c.<\/p>\n\n

M\u1ed9t h\u1ed3 s\u01a1 \u0111\u01a1n gi\u1ea3n<\/h2>\n\n

Kh\u00f4ng gi\u1ed1ng nh\u01b0 nhi\u1ec1u lo\u00e0i kh\u1ee7ng long m\u1ecf v\u1ecbt kh\u00e1c, Acristavus kh\u00f4ng c\u00f3 c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m trang tr\u00ed h\u1ed9p s\u1ecd tinh x\u1ea3o \u0111\u1eb7c tr\u01b0ng cho h\u1ecd h\u00e0ng c\u1ee7a ch\u00fang. Ngo\u1ea1i h\u00ecnh “tr\u01a1n” n\u00e0y gi\u00fap Acristavus tr\u1edf n\u00ean kh\u00e1c bi\u1ec7t v\u00e0 cung c\u1ea5p th\u00f4ng tin c\u00f3 gi\u00e1 tr\u1ecb v\u1ec1 l\u1ecbch s\u1eed ti\u1ebfn h\u00f3a c\u1ee7a kh\u1ee7ng long m\u1ecf v\u1ecbt.<\/p>\n\n

B\u1ed1i c\u1ea3nh ti\u1ebfn h\u00f3a<\/h2>\n\n

Kh\u1ee7ng long m\u1ecf v\u1ecbt l\u00e0 m\u1ed9t nh\u00f3m kh\u1ee7ng long \u0111a d\u1ea1ng ti\u1ebfn h\u00f3a t\u1eeb nh\u1eefng h\u1ecd h\u00e0ng tr\u01b0\u1edbc \u0111\u00f3 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 kh\u1ee7ng long iguanodon. M\u1ed9t trong nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m x\u00e1c \u0111\u1ecbnh c\u1ee7a kh\u1ee7ng long m\u1ecf v\u1ecbt l\u00e0 nhi\u1ec1u ki\u1ec3u trang tr\u00ed h\u1ed9p s\u1ecd, bao g\u1ed3m m\u00f5m v\u1edbi ph\u1ea7n nh\u00f4 ra, m\u00e1i ch\u00e8o v\u00e0 mu\u1ed7ng. Tuy nhi\u00ean, h\u1ed9p s\u1ecd \u0111\u01a1n gi\u1ea3n c\u1ee7a Acristavus cho th\u1ea5y r\u1eb1ng c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m trang tr\u00ed kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m ph\u1ed5 bi\u1ebfn gi\u1eefa kh\u1ee7ng long m\u1ecf v\u1ecbt.<\/p>\n\n

S\u1ef1 ti\u1ebfn h\u00f3a \u0111\u1ed9c l\u1eadp c\u1ee7a c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m trang tr\u00ed<\/h2>\n\n

Vi\u1ec7c ph\u00e1t hi\u1ec7n ra Acristavus c\u1ee7ng c\u1ed1 th\u00eam cho gi\u1ea3 thuy\u1ebft r\u1eb1ng hai nh\u00f3m kh\u1ee7ng long m\u1ecf v\u1ecbt ch\u00ednh, lambeosaurine v\u00e0 hadrosaurine, \u0111\u00e3 ph\u00e1t tri\u1ec3n c\u00e1c ki\u1ec3u trang tr\u00ed kh\u00e1c nhau m\u1ed9t c\u00e1ch \u0111\u1ed9c l\u1eadp. Lambeosaurine, ch\u1eb3ng h\u1ea1n nh\u01b0 Parasaurolophus, c\u00f3 h\u1ed9p s\u1ecd d\u00e0i v\u1edbi m\u00e0o, trong khi hadrosaurine, nh\u01b0 Maiasaura, c\u00f3 nh\u1eefng bi\u1ebfn \u0111\u1ed5i h\u1ed9p s\u1ecd tinh t\u1ebf h\u01a1n.<\/p>\n\n

S\u1ef1 thay \u0111\u1ed5i t\u1eeb nh\u1eefng t\u1ed5 ti\u00ean c\u00f3 h\u1ed9p s\u1ecd \u0111\u01b0\u1ee3c trang tr\u00ed?<\/h2>\n\n

V\u1ecb tr\u00ed ti\u1ebfn h\u00f3a c\u1ee7a Acristavus cho th\u1ea5y r\u1eb1ng nh\u1eefng lo\u00e0i kh\u1ee7ng long hadrosaurid \u0111\u1ea7u ti\u00ean kh\u00f4ng c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m trang tr\u00ed tr\u00ean h\u1ed9p s\u1ecd. \u0110i\u1ec1u n\u00e0y ng\u1ee5 \u00fd r\u1eb1ng c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m trang tr\u00ed \u0111\u00e3 ti\u1ebfn h\u00f3a \u0111\u1ed9c l\u1eadp trong m\u1ed7i nh\u00f3m ch\u00ednh c\u1ee7a hai nh\u00f3m. Tuy nhi\u00ean, v\u1eabn c\u00f3 kh\u1ea3 n\u0103ng Acristavus \u0111\u00e3 m\u1ea5t \u0111i th\u1ee9 y\u1ebfu c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m trang tr\u00ed v\u1ed1n c\u00f3 \u1edf t\u1ed5 ti\u00ean c\u1ee7a ch\u00fang, nh\u01b0 tr\u01b0\u1eddng h\u1ee3p c\u1ee7a lo\u00e0i kh\u1ee7ng long m\u1ecf v\u1ecbt Edmontosaurus \u1edf giai \u0111o\u1ea1n sau.<\/p>\n\n

T\u1ea7m quan tr\u1ecdng c\u1ee7a Acristavus<\/h2>\n\n

Acristavus ch\u1ec9 l\u00e0 m\u1ed9t kh\u00e1m ph\u00e1 v\u00e0 c\u1ea7n c\u00f3 th\u00eam nghi\u00ean c\u1ee9u \u0111\u1ec3 hi\u1ec3u \u0111\u1ea7y \u0111\u1ee7 v\u1ec1 l\u1ecbch s\u1eed ti\u1ebfn h\u00f3a c\u1ee7a c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m trang tr\u00ed \u1edf kh\u1ee7ng long m\u1ecf v\u1ecbt. Tuy nhi\u00ean, c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m \u0111\u1ed9c \u0111\u00e1o v\u00e0 v\u1ecb tr\u00ed ti\u1ebfn h\u00f3a c\u1ee7a ch\u00fang cung c\u1ea5p m\u1ed9t ph\u1ea7n th\u00f4ng tin c\u00f3 gi\u00e1 tr\u1ecb cho b\u1ee9c tranh t\u1ed5ng th\u1ec3.<\/p>\n\n

M\u1ed9t nh\u00f3m ph\u1ee5 \u0111\u1eb7c bi\u1ec7t: Brachylophosaurini<\/h2>\n\n

Acristavus thu\u1ed9c v\u1ec1 m\u1ed9t nh\u00f3m kh\u1ee7ng long m\u1ecf v\u1ecbt \u0111\u1eb7c bi\u1ec7t \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Brachylophosaurini, trong \u0111\u00f3 c\u00f2n c\u00f3 Maiasaura v\u00e0 Brachylophosaurus. Trong khi Maiasaura v\u00e0 Brachylophosaurus c\u00f3 m\u00f5m \u0111\u01b0\u1ee3c trang tr\u00ed v\u00e0 bi\u1ebfn \u0111\u1ed5i, th\u00ec Acristavus v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c h\u1ed9p s\u1ecd tr\u00f4ng c\u1ed5 h\u01a1n.<\/p>\n\n

Nh\u1eefng kh\u00e1m ph\u00e1 trong t\u01b0\u01a1ng lai<\/h2>\n\n

Vi\u1ec7c ph\u00e1t hi\u1ec7n ra Acristavus \u0111\u00e3 m\u1edf ra nh\u1eefng h\u01b0\u1edbng nghi\u00ean c\u1ee9u m\u1edbi v\u1ec1 s\u1ef1 ti\u1ebfn h\u00f3a c\u1ee7a kh\u1ee7ng long m\u1ecf v\u1ecbt. Hy v\u1ecdng r\u1eb1ng nh\u1eefng kh\u00e1m ph\u00e1 trong t\u01b0\u01a1ng lai s\u1ebd gi\u00fap c\u00e1c nh\u00e0 c\u1ed5 sinh v\u1eadt h\u1ecdc hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u00e1ch nh\u1eefng ng\u01b0\u1eddi kh\u1ed5ng l\u1ed3 th\u1eddi ti\u1ec1n s\u1eed n\u00e0y c\u00f3 \u0111\u01b0\u1ee3c c\u00e1c \u0111\u1eb7c \u0111i\u1ec3m trang tr\u00ed h\u1ed9p s\u1ecd \u0111\u1eb7c bi\u1ec7t c\u1ee7a ch\u00fang.<\/p>","protected":false},"excerpt":{"rendered":"

Acristavus: M\u1ed9t lo\u00e0i kh\u1ee7ng long m\u1ecf v\u1ecbt m\u1edbi t\u1eeb B\u1eafc M\u1ef9 Kh\u00e1m ph\u00e1 ra Acristavus Trong th\u1ebf gi\u1edbi kh\u1ee7ng long, nh\u1eefng c\u1ea5u tr\u00fac k\u1ef3 l\u1ea1 nh\u01b0 c\u00e1nh bu\u1ed3m v\u00e0 s\u1eebng…<\/p>\n","protected":false},"author":1,"featured_media":24106,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[138],"tags":[18121,18123,137,16776,512,18122],"class_list":["post-13436","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-paleontology","tag-acristavus","tag-brachylophosaurini","tag-paleontology","tag-hadrosaur","tag-dinosaur-evolution","tag-unornamented-hadrosaurs"],"_links":{"self":[{"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/posts\/13436","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/comments?post=13436"}],"version-history":[{"count":2,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/posts\/13436\/revisions"}],"predecessor-version":[{"id":24238,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/posts\/13436\/revisions\/24238"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/media\/24106"}],"wp:attachment":[{"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/media?parent=13436"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/categories?post=13436"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.lifescienceart.com\/vi\/wp-json\/wp\/v2\/tags?post=13436"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}