English
聯系我們
網站地圖
郵箱
舊版回顧



霸王龍曾是“中等個”

文章來源:中國科學報   發布時間:2019-05-10  【字號:     】  

  現在,人們對霸王龍的祖先可能什么樣子有了更好的了解。研究人員發現了一個霸王龍新物種的兩塊化石。其被稱為Suskityrannus hazelae,生活在約9000萬年前,早于暴龍科進化成像霸王龍一樣的龐然大物。

  兩塊化石表明,霸王龍在體型很小時就已發育出很多特有的特征,比如肌肉發達的頭骨、寬大的嘴巴和能吸收震動的腳。“Suskityrannus讓我們得以一窺暴龍在接管地球之前的進化過程。”美國弗吉尼亞理工大學古生物學家Sterling Nesbitt說。

  霸王龍是地球上最大的捕食者之一,可能也是所有恐龍中最著名的物種。Nesbitt表示,很多人沒有意識到,像霸王龍這樣的巨型暴龍在地球上的統治時間驚人地短——它們只在恐龍滅絕前的1500萬年左右開始進化。

  古生物學家發現,在這些“巨人”出現之前的1.5億年,地球上早就生活著小型暴龍。但由于化石記錄的缺失,在這些巨獸進化之前發生了什么一直是個謎。

  S. hazelae填補了這一空白。1997年,研究人員在新墨西哥州發現了這種恐龍的第一具非常不完整的骨架。1998年,當Nesbitt還在上高中時,科學家又發現了第二塊更完整的化石。如今,Nesbitt和同事終于發表論文來描述這一發現。

  該團隊估測,第二只恐龍的臀部高1米、身長3米,體重在20~40公斤。骨頭顯示,它死時還是一只幼龍,所以該物種的體型可能更大,但肯定沒有霸王龍那么大。

  為何在如今的北美和亞洲游蕩的暴龍在成為龐然大物之前的1.5億年里一直保持中等體型,原因尚不清楚。但其他種類的恐龍,如鴨嘴恐龍和角龍,后來同樣擁有更大的體型,因此也許暴龍是在和它們的獵物同步進化。相關成果日前發表于《自然—生態與進化》雜志。




(責任編輯:侯茜)

附件:

專題推薦

相關新聞


© 1996 - 中國科學院 版權所有 京ICP備05002857號  京公網安備110402500047號  聯系我們

地址:北京市三里河路52號 郵編:100864

五星彩票www.5xch.com 353242.com | 631902.com | www.53fw.com | www.520.org | www.179505.com | www.611850.com | 331340.com | 946506.com | 639004.com | www.89bg.com | www.253872.com | www.654974.com | 208556.com | 659836.com | www.93bb.com | www.01672.com | www.093522.com | www.804680.com | 618714.com | www.hb12.com | www.11359.com | www.059097.com | www.183712.com | www.508054.com | www.717103.com | www.850078.com | www.07ca.com | www.192084.com | www.397044.com | www.976992.com | www.11hf.com | www.01550.com | www.004173.com | www.645848.com | 447367.com | www.65yv.com | www.035074.com | www.335108.com | www.824605.com | 954821.com | 699901.com | www.00aj.com | www.91884.com | www.218320.com | www.525217.com | www.90559.com | 995484.com | www.914098.com | www.183575.com | www.09465.com | 129607.com | www.752477.com | www.182332.com | 7750.biz | www.cp547.com | www.zz93.com | www.3988.tv | www.59202.com | www.279666.com | www.501219.com | www.798298.com | www.51zm.cc | www.6308.vip | www.025046.com | www.220245.com | 254638.com | www.840053.com | www.673181.com | www.93543.com | www.677532.com | 130334.com | 500彩票网www.97655i.com | www.12009.cc | www.203557.com | www.171607.com | www.618021.com | www.454514.com | www.84013.com | 355kk.com | www.634004.com | www.368360.com | www.753881.com | www.777348.com | www.991969.com | www.987864.com | 484823.com | www.025311.com | www.cp534.com | www.992525.com | www.372912.com | www.1580.org | www.086601.com | www.151757.com | www.381447.com | www.813311.com | 凤凰彩票www.452807.com | www.066071.com | www.97yu.com | 620902.com | www.801041.com | www.225365.cc | www.698620.com | www.141005.com | www.4649.cn | 032550.com | www.592535.com | www.0926.vip | www.652323.com | www.950912.com | www.931779.com | www.968475.com | www.991169.com | www.17894.com | www.089705.com | www.028143.com | www.635612.com | www.314254.com | www.3709.cm | www.94gm.com | www.760533.com | 500彩票www.383571.com | www.777304.com | www.041192.com | 500万彩票www.35155o.com | 287376.com | www.182508.com | www.620328.com | www.771742.com | www.36qg.com | 957149.com | 933273.com | www.16722.com | www.14nr.com | www.895883.com | www.402555.com | www.028862.com | 500彩票www.52072t.com | www.731955.com | www.055604.com | www.426882.com | www.401488.com | 397460.com | www.cp6678.com | www.3fg.cc | www.25wo.com | www.1184.vip | www.7316.loan | www.382152.com | www.578873.com | www.574055.com | 932355.com | 325654.com | www.kq69.com | www.3998.pw | www.91228.cc | www.170705.com | 8308.hk | www.39731.cc | www.308840.com | www.835560.com | www.788449.com | www.927545.com | www.995047.com | www.947468.com | www.971933.com | 520282.com | www.795756.com | www.683112.com | www.132158.com | www.054958.com | www.00xg.com | www.959049.com | www.169653.com | www.27590.com | 526644.com | www.604979.com | www.407552.com | www.091083.com | 大赢家彩票平台www.068653.com | www.898436.com | www.150542.com | www.933.org | 323742.com | www.0287.xyz | www.081393.com | www.150509.com | www.570257.com | www.au16.com | www.740366.com | www.569162.com | www.17322.cc | 127085.com | www.446518.com | www.ef25.com | www.113521.com | www.102857.com | www.510416.com | www.480043.com | 120545.com | 054831.com | 彩民村www.88cmc.com | www.87248.com | www.139160.com | www.505149.com | www.856176.com | 08175.com | 925339.com | 414703.com | www.ti6.com | www.c3.cc | www.ba19.com | www.1582.me | www.19750.com | www.206278.com | www.505732.com | www.318447.com | www.150611.com | www.222617.com | www.254034.com | www.070055.com | www.51517.cc | www.53679.com | www.095212.com | www.77938.cc | www.33026.com | www.152557.com | www.072551.com | www.435785.com | www.343896.com | www.252306.com | www.111524.cc | www.047395.com | www.017139.com | www.61533.com | www.6830.org | www.37244.com | www.7088.biz | www.8365.cm | www.95rl.com | www.039053.com | www.828230.com | www.392356.com | www.95307.com | 481.me | www.788357.com | www.180974.com | www.5ba.cc | www.929323.com | www.120298.com | 大赢家彩票平台www.526733.com | www.973790.com | www.585896.com | www.263327.com | www.5851.top | 豪彩VIPwww.355183.com | www.735573.com | www.96127.com | www.062539.com | www.600058.com | www.339069.com | www.46hn.com | www.886954.com | www.619994.com | www.154366.com | www.51991.com | 财神网www.29277o.com | www.657124.com | www.34952.com | www.938.in | 812170.com | www.615422.com | www.167085.com | www.0484.website | 270303.com | www.244649.com | www.370.tv | 036502.com | www.371735.com | www.8898.top | 幸运彩票www.444601.com | www.770173.com | www.77573.com | www.kd.com | 458844.com | www.296151.com | www.zh17.com | www.900081.cc | www.430714.com | www.1216.xyz | 508901.com | www.434328.com | www.15874.com | 125214.com | www.532319.com | www.7949.vip | 268304.com | www.647625.com | www.251196.com | www.03ry.com | 026446.com | www.313067.com | www.57lx.com | www.909369.com | www.062295.com | www.025105.com | www.024576.com | www.094952.com | www.118668.com | www.082076.com | www.599816.com | 双彩网www.179012.com | www.0058.top | www.37823.cc | www.126876.com | www.209347.com | www.548665.com | 670236.com | www.672357.com | www.92233.com | www.zu81.com | www.0903.site | www.14ew.com | www.03307.com | www.35yw.com | 恒彩www.hcw778.com | 790778.com | www.712829.com | www.344040.com | www.31hg.com | www.843987.com | www.333661.cc | www.cp9575.com | www.ij7.cc | www.49lr.com | www.ji92.com | www.jj09.com | 751143.com | 970394.com | 587888.com | www.902990.com | www.94qg.com | www.4246.com | www.2107.vip | www.34975.com | www.456663.com | www.389263.com | www.615246.com | 七乐彩票www.qilc3.com | 彩多多www.78949i.com | www.21om.com | www.o77.com | www.ve11.com | www.16bh.com | www.dn42.com | www.42hs.com | www.j58.top | www.sc68.com | www.045686.com | www.765422.com | 121450.com | 235655.com | m08.xyz | 82bq.com | 934893.com | www.33116.com | 500彩票www.66653h.com | www.770514.com | www.053277.com | www.13db.com | www.863353.com | www.528529.com | www.9390.biz | www.tg76.com | 66039.cc | www.747931.com | www.423374.com | www.17622.com | 934392.com | www.580476.com | www.23434.cc | 中国福利彩票www.33588a.com | www.735363.com | www.186343.com | 561031.com | 877540.com | www.58hk.cc | www.84814.com | www.084586.com | www.113679.com | www.045347.com | www.561809.com | www.909642.com | 703954.com | www.311270.com | www.115002.com | www.706704.com | 356590.com | www.bf9.com | 365694.cc | www.501187.com | 275695.com | 500彩票www.50080l.com | www.xp.cc | 好乐多www.c760.vip | www.sa64.com | 博友彩www.921677.com | JJ彩票www.92092.cc | www.9918.tv | www.vq44.com | 160064.com | www.879646.com | www.292907.com | www.166033.com | www.80664.com | www.4613.cc | www.477180.com | www.9495.xyz | 891310.com | www.866810.com | www.416918.com | www.9236.vip | www.89cw.com | www.722662.com | www.552327.com | www.641919.com | www.886658.com | 675532.com | www.107767.com | www.8037.org | 091144.com | www.581958.com | www.8714.vip | www.0653.com | GO彩www.bei01.com | www.889575.com | www.062646.com | www.35159.com | 易购彩票www.234827.com | 3672.biz | www.769190.com | www.076656.com | www.38uu.com | www.873657.com | www.880850.com | www.107128.com | www.up25.com | www.870785.com | www.989949.com | 949379.com | www.801886.com | www.809011.com | www.550869.com | 266036.com | www.963393.com | www.158684.com | www.36693.com | 068837.com | www.365094.com | www.025678.com | www.666644.com | www.688714.com | www.197651.com | www.cp3.biz | www.4292.cn | www.029585.com | www.89099.cc | www.062986.com | www.062882.com | www.288631.com | www.155524.com | www.503122.com | 431073.com | 365898.cc | 444480.com | www.191104.com | www.557130.com | www.712237.com | www.075078.com | www.88439.cc | www.26ka.cc | 783496.com | www.840940.com | 129980.com | 025171.com | www.972669.com | www.515333.com | www.504922.com | www.388756.com | www.543111.cc | www.663374.com | www.313356.com | www.w06.cn | 易彩网www.12455b.com | 070992.com | www.473098.com | 542334.com | 万历彩票www.77114b.com | 大赢家彩票www.5086o.com | 448673.com | 818合彩www.www.9889hc.com | 638725.com | 904056.com | www.m87.com | www.953315.com | www.071575.com | www.010.website | 19128.com | www.271133.com | www.lg70.com | 390608.com | www.354019.com | www.l42.com | www.879321.com | www.513241.com | www.118700.com | 584633.com | www.578566.com | www.618794.com | www.592581.com | www.020012.com | www.27vd.com | www.390258.com | www.748822.com | www.655565.com | www.848131.com | cai1155.com | 269561.com | 682312.com | 072055.com | www.552.win | www.75290.com | www.308860.com | www.552659.com | 893175.com | 716110.com | 864797.com | 553853.com | www.82821.com | 960465.com | www.cp9665.com | 678431.com | 946881.com | 541779.com | 526030.com | 网易彩票www.083wy.com | 508417.com | www.3357.in | 033072.com | www.875411.com | www.719273.com | www.102182.com | 幸运彩票www.5095t.com | www.610929.com | www.089838.com | www.965515.com | www.987832.com | www.857389.com | 974860.com | 彩之家www.34czj.com | 573552.com | 亿彩堂www.87668c.com | 381914.com | 500万彩票www.98528f.com | www.96gn.com | www.40993.com | www.419889.com | www.508380.com | www.539501.com | www.820726.com | www.ze74.com | wl63.com | 301828.com | 395501.com | 227187.com | www.22jf.com | www.wr66.com | www.113111.com | www.206936.com | www.418081.com | www.783889.com | www.917.red | www.023736.com | www.75078.com | www.379326.com | www.511336.com | www.907666.cc | www.31873.com | www.219861.com | www.260900.com | www.678009.com | www.187271.com | www.1502.wang | www.lc20.com | www.816763.com | www.58644.com | www.ox97.com | www.872636.com | www.160615.com | www.15840.com | 415029.com | www.329018.com | www.561112.com | www.900956.com | www.1336.cm | www.80865.cc | www.384975.com | www.668377.com | www.434242.com | 222465.com | www.940335.com | www.810368.com | www.456274.com | www.274184.com | www.414117.com | www.207848.com | www.86623.cc | www.01619.com | www.77cq.com | 263627.com | 971475.com | www.69nm.com | www.54242.com | 500彩票网www.61655b.com | www.675817.com | www.077750.com | wz75.cc | www.671575.com | 彩82www.128083.com | 674484.com | www.4670.cc | www.zk12.com | 454311.com | eh83.com | www.818714.com | www.11gt.com | www.lx66.com | 万利www.32123v.com | www.886513.com | www.316683.com | www.28372.cc | www.8gn.com | 675872.com | www.471318.com | www.82yb.com | www.857563.com | 033909.com | www.991044.com | www.771530.com | www.607559.com | www.302218.com | www.53733.com | www.87074.com | www.4905.xyz | www.5272.cm | 幸运彩票网www.33598o.com | 441345.com | www.659063.com | www.666766.cc | www.314955.com | www.573937.com | www.381467.com | www.1vq.com | www.wd84.com | www.79015.com | www.72486.com | www.027585.com | www.524198.com | www.513510.com | www.738208.com | www.974729.com | www.219885.com | www.948664.com | 984379.com | 280011.com | 781301.com | www.894622.com | www.705855.com | www.511500.com | www.384396.com | www.524493.com | www.228393.com | www.610094.com | www.631946.com | www.717681.com | www.695058.com | www.902531.com | www.654969.com | www.772620.com | www.506178.com | www.211155.com | www.085318.com | www.411032.com | www.595412.com | www.a51.space | www.34ib.com | www.077886.com | www.693276.com | 502930.com | 053902.com | 583632.com | 606761.com | www.nh08.com | 796944.com | 254936.com | 236157.com | 576694.com | www.qp08.com | www.cai1392.com | 86520.com | gl04.com | 830803.com | www.gq.com | www.168686.com | www.162204.com | www.05267.com | www.227220.com | www.000555.cc | www.97891.com | www.073060.com | www.00gn.cc | www.669210.com | www.611082.com | www.353528.com | www.582226.com | www.316189.com | www.866139.com | 402298.com | www.731279.com | www.69259.com | www.52722.com | www.307667.com | www.398877.com | www.372825.com | www.455269.com | www.271194.com | www.059103.com | www.25105.com | www.01bd.com | 501451.com | 041220.com | www.800162.com | www.23316.cc | 974758.com | www.977785.com | 959846.com | 761584.com | 982226.com | www.952360.com | 275661.com | 171985.com | 091265.com | www.99782.cc | www.54900.com | www.365636.cc | www.526975.com | www.977562.com | www.825611.com | www.620609.com | www.cai6022.com | 128063.com | www.8340.in | www.0800.mobi | www.67ey.com | www.e37.net | www.k12.site | 326253.com | 621155.com | www.114bf.org | www.66237.com | www.44ec.com | 盛大彩票www.ct8844.com | 319120.com | www.9969.biz | www.05fz.com | www.1270.wang | www.13722.cc | www.45ug.com | www.008974.com | www.62671.cc | www.86509.com | www.007031.com | www.286108.com | www.039595.com | www.8081.com | www.63us.com | www.455.live | www.11222.cc | 789423.com | www.966882.com | www.661477.com | 706179.com | www.fi46.com | 24046.cc | 855265.com | 385595.com | 029390.com | www.106177.com | www.51681.com | 816884.com | www.866303.com | www.1968.tv | www.012401.com | www.5cu.com | www.08dt.com | www.7nz.com | www.50ac.com | www.6934.org | www.oz35.com | www.98au.com | www.12my.com | www.6238.shop | www.154508.com | www.194609.com | www.52335.cc | www.69218.com | www.105860.com | www.11979.cc | www.5114.cc | 金彩www.983jc.com | 033041.com | www.955150.com | www.md20.com | www.15by.com | www.90mm.cc | www.307051.com | www.208779.com | www.221275.com | www.854137.com | www.975114.com | www.870309.com | www.932968.com | www.586480.com | www.579539.com | www.491345.com | www.342212.com | 3G彩票www.c189.vip | 158607.com | www.cai82.cc | 814411.com | www.6596.xyz | 953492.com | 184735.com | www.971166.com | www.866741.com | www.709443.com | www.748818.com | www.5550.xyz | www.va63.com | www.946.net | www.wz21.com | www.89oz.com | www.34826.com | www.5108.cc | www.669048.com | www.qi35.com | 005257.com | 032826.com | 792212.com | www.876471.com | 28uq.com | 597469.com | www.971843.com | www.uy28.com | 507907.com | www.648.in | www.500.cc | www.0040.xyz | www.00025.cc | www.52736.cc | www.89470.com | www.171133.com | www.066006.com | www.567980.com | www.056300.com | www.028071.com | www.133969.com | www.903161.com | www.827911.com | www.ez25.com | www.34vg.com | 凤凰彩票www.88266w.com | 081604.com | www.se24.com | www.15752.cc | www.2411.com | www.7kw.com | www.129093.com | www.857636.com | www.oy06.com | www.695032.com | www.32nv.com | 953985.com | 557454.com | www.640974.com | www.711730.com | 942668.com | 773104.com | www.612233.com | www.863758.com | 026485.com | www.676671.com | www.11rr.cc | www.9320.loan | www.19lw.com | www.70ky.com | www.61vp.com | www.157075.com | www.11800.com | www.095068.com | www.xk98.com | 962214.com | 31mj.com | www.789074.com | www.723059.com | www.776832.com | www.241822.com | www.586798.com | 071877.cc | www.268461.com | www.0263.xyz | www.986034.com | www.033714.com | 812858.com | www.83ev.com | 633171.com | 165111.com | 52430.cc | www.509772.com | www.227765.com | www.3073.cm | 61ag.com | www.586554.com | www.365470.cc | 大赢家彩票平台www.810726.com | www.954349.com | www.770122.com | www.43tg.com | www.335396.cc | www.101620.com | www.7821.com | www.947401.com | 40430.com | www.973312.com | www.030110.com | 397514.com | 天下彩www.890402.com | www.784819.com | www.978490.com | www.44zm.com | www.488.cc | www.lx13.com | www.xx60.com | 254796.com | www.02899.cc | www.vc7.com | 彩之家www.01czj.com | 017677.com | www.307969.com | www.878357.cc | www.38d