-
-
45以前滑齿龙25米变成7米 沧龙18-20米变成12米左右 鱼龙倒是越来越大 最大个体可能25-30米 沧龙和上龙在白垩纪和侏罗纪两个物种最丰富的年代大小还不如鱼龙在三叠纪这个经历过物种大灭绝的时代 不科学
-
0
-
49恐鳄和霸王龙究竟谁大,YouTube搞论战的都说恐鳄贼大,贼牛逼
-
12
-
175
-
6
-
2目前现实现在有这种案例吗?
-
5
-
69
-
444
-
60
-
7rt,看到大部分的恐龙牙齿都是一排,大小差异不大,兽脚类恐龙有牙齿分化程度大的种类吗
-
12三大鳄目前各自的体型怎么样?恐鳄已经超过普鳄了吗?帝鳄的体型呢?恐鳄目前是万鳄之王吗?(求得到答复)
-
16
-
3
-
46怎么感觉中生代里的海洋动物体型不行啊。现代海洋里的鲸鱼可比陆地上的大象大多了。而中生代的陆地上有至少二三十米的蜥脚类恐龙,那么海里为什么没有比它们还巨大很多的动物呢?
-
893
-
0Eudromaeosauria is a clade of derived dromaeosaurids that typifies the common perception of ‘raptor’ dinosaurs. The evolutionary history of this clade has been controversial due to conflicting views of taxonomic identity, and because, due to taphonomic bias, several species were diagnosed primarily or solely by the maxilla. The maxilla is therefore crucial in understanding the phylogenetic relationships within the clade. Morphometric characterization has been commonly applied to recognize and distinguish major dromaeosaurid clades. However, morphometrics mainly showed morphological converg
-
63
-
13例如恐爪龙类和偷蛋龙类、非鸟鸟翼类,拥有现代意义的片状羽毛、恒温,却是爬行动物 再说说鸟类,脚下有鳞片和拥有羊膜卵,基本爬行动物特征,然后却是单独一个纲
-
66
-
47
-
26
-
1
-
5新手看不出区别来
-
346
-
8
-
23每天都在刷 貌似还没更新
-
8Published: 16 April 2024 Morphological disparity and structural performance of the dromaeosaurid skull informs ecology and evolutionary history 最近一个月内驰龙科和伤齿龙科的头部形态结构演化研究也值得一看 研究中,发现类似伶盗龙属细头是为驰龙科和伤齿龙科较为原始的形态,艾伯塔驰龙则是粗头衍生进步形态 哈兹卡盗龙吃的可能是昆虫什么的而不是鸬鹚一样抓鱼 Combining our new morphofunctional data with a re-evaluation of previous evidence, we find piscivorous reconstructions of Halszkaraptor escuilliei to
-
196
-
102
-
91
-
0东南亚缅甸,泰国,老挝,柬埔寨,越南,马来西亚都有恐龙化石出土,不知道印尼有没有?
-
31
-
22
-
0河北老乡有未定种剑龙科,未定种角龙下目,巨嵴彩虹龙,丰宁原羽鸟,最后斑鬣狗,直隶狼,莫斯巴赫狼变异狼亚种,直立人,埃楚斯堪熊,大安虎支系,草原猛犸象,诺氏古菱齿象,诺氏驼,麋鹿属化石,葛氏斑鹿,杨氏虎Panthera youngi,泥河湾巨颏虎,泥河湾披毛犀,一些仓鼠科,一些兔科兔亚科,裴氏貉,中华貉,山西猞猁,西瓦猎豹,巨猎豹,硕鬣狗,丛氏原鸽,安氏鸵鸟,普通渡鸦(这些老乡)
-
137
-
5