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Dinosaurprince (Dinosaur Prince)
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Deinonychus



Scientific Name : Deinonychus Antirrhopus

Name Meaning : 'Terrible Claws'

Family : Dromaesauridae

Period : Early Cretaceous ((Aptian - Albian stages, 121 to 98.9 million years ago )

Location : USA ( Montana, Wyoming and Oklahoma , also probably Maryland )

Length : 3m (11 ft)

Height : 2m (7 ft to head) , 0.87m ( 2.87 ft to hip)

Weight : 73 kg ( 161 lbs)

Introduction :

As the name 'Terrible Claws', Deinonychus is named after its large and terrible claw. Its claw is about 12cm (5 in) in length. Try to imagine when the claw is stab into your stomach, your oargans and blood probably flood outside. With the power of company, the animals are enough to kill large dinosaurs like sauropods and ankylosauridae. What's more? Their teeth is similar to a hook and bore prominent serrations. This is very conveinent for them to cut fresh and bones.Also, their teeth provided the function of cutting fresh alive from their prey. It is definitely a nightmate in the Cretaceuos America.

However, this species of the terrible dinosaur is though to be a very close relative to birds. In the 1960s, when the feathered dromaesaurus still earthed in China. American scientist try to compare the bone of therapod dinosaurs with birds. Finally, they found that Deinonychus skeleton is look like a bird skeleton! So it lead a hypothesis that Deinonychus could be an ancestor or relative of birds. Finally, when the feathered dromaesaurus finally in China, the hypothesis proved to be right. But we still don't know exactly should dromaesaurus be ancestor or relative of birds.

Finally, everyone think that dromaesaurus like deinonychus could run very fast. But according to the recent study. The ratio of  foot and tibia is .48, which lesser than Struthiomimus (.68) and modern fleet-footed birds like ostrich (.95). This is proved that they cannot run very fast. But the storter ratio can reduce their stress when jumping and slashing their prey. Personally , I think they will hide in somewhere and wait for their prey and kill.Beside that I dun think they will run and walk all the times but jump like modern spallow is more suitable for them.

Here copy from my blog...
有冇人幫幫手translate to 中文?
Happy New year

[ 本帖最後由 Dinosaurprince 於 2009-1-1 03:26 PM 編輯 ]
2009-1-1 03:24 PM#1
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Franco仔 (震旦紀)
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不是翻譯,是我找的資料


恐爪龍 deinonychus

身長 : 4米

體重 : 500公斤

時代:白堊紀前期

食物:肉食

生存年代:

1億-1億1000萬年前,白堊紀

生存地點:

美國的蒙大拿州,猶他州和懷俄明州

辨認要決:

手有三個手指,每只腳有四個腳趾,其中一個長著長爪



恐龍種類:

蜥臀目·虛骨龍類

恐爪龍英文名字的含義是“恐怖的爪子”。

被認為是最不尋常的掠食者。大約二公尺七十公分長,一點五公尺高,但體重和人類差不多重而已。這個白堊紀中期獸足類最不可思議的特性在於每個後腳具有十三公分、像鐮刀狀、或者”彈簧刀”狀的爪子。對獸足類而言,它的前指也異常的長,但對恐爪龍而言其長度剛好能?抓住獵物然後用有勾爪的腳去踢獵物的肚子,撕開皮膚。恐爪龍和暴龍、異特龍等肉食恐龍相比,只能是小型的肉食恐龍,但是,恐爪龍行動非常敏捷,腦容量又大,再加上前後肢均長有非常尖銳的爪子,因此是一種非常具有危險性的肉食恐龍。恐爪龍一種極具殺傷力的中小型恐龍,全長約4米。生有多樣利器:頭部較大,嘴里有利刃狀帶鋸齒的牙齒;後肢常兩趾著地,第三趾上長著長約12厘米,像鐮刀一樣的利爪,這是它捕殺獵物的重要武器;前肢細長,指上也有利爪,而且靈活,便於抓握。另外,它還有一種獨特的捕殺本領:一只腳著地,另一只腳舉起"鐮刀",加上前肢利爪的配合,很容易將獵物開膛破肚,一下子置於死地。

恐爪龍的大頭上長著非常鋒利的牙和堅固的下巴。它用兩腳站立,前臂比較短。每只手上有三個帶著尖長爪子的手指,每只腳有四個腳趾,其中一個腳趾上長著5英寸長(約12釐米)的利爪。它有個長尾巴。它的眼睛非常大,所以能看得很清楚。恐爪龍非常聰明,它們成群打獵,跑起來非常迅速。恐爪龍是肉食動物。它吃任何它可以捕殺並撕裂的動物。




我愛活化石!
2009-1-1 07:16 PM#2
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Franco仔 (震旦紀)
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or 去一去呢個網see see 有 恐爪龙的資料(圖文)

http://www.dinosaur.net.cn/Museum/Deinonychus.htm




我愛活化石!
2009-1-1 07:18 PM#3
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Dinosaurprince (Dinosaur Prince)
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回復 #2 Franco仔 的帖子

Re: 恐爪龍非常聰明,它們成群打獵,跑起來非常迅速。
See the article belows.....
Dromaeosaurids, especially Deinonychus, are often depicted as unusually fast-running animals in the popular media, and Ostrom himself speculated that Deinonychus was fleet-footed in his original description.[17] However, when first described, a complete leg of Deinonychus had not been found, and Ostrom's speculation about the length of the femur (upper leg bone) later proved to have been an overestimate. In a later study, Ostrom noted that the ratio of the femur to the tibia (lower leg bone) is not as important in determining speed as the relative length of the foot and lower leg. In modern, fleet-footed birds like the ostrich, the foot-tibia ratio is .95. In unusually fast-running dinosaurs like Struthiomimus, the ratio is .68, but in Deinonychus, the ratio is .48. Ostrom stated that the "only reasonable conclusion" is that Deinonychus was not particularly fast compared to other dinosaurs, and certainly not as fast as modern flightless birds.[31]
The low foot to lower leg ratio in Deinonychus is due partly to an unusually short metatarsus (upper foot bones). The ratio is actually larger in smaller individuals than in larger ones. Ostrom suggested that the short metatarsus may be related to the function of the sickle claw, and used the fact that it appears to get shorter as individuals aged as support for this. He interpreted all these features – the short second toe with enlarged claw, short metatarsus, etc. – as support for the use of the hind leg as an offensive weapon, where the sickle claw would strike downwards and backwards, and the leg pulled back and down at the same time, slashing and tearing at the prey. Ostrom suggested that the short metatarsus reduced overall stress on the leg bones during such an attack, and interpreted the unusual arrangement of muscle attachments in the Deinonychus leg as support for his idea that a different set of muscles were used in the predatory stroke than in walking or running. Therefore, Ostrom concluded that the legs of Deinonychus represented a balance between running adaptations needed for an agile predator, and stress-reducing features to compensate for its unique foot weapon.[31]
In his 1981 study of Canadian dinosaur footprints, Richard Kool produced rough walking speed estimates based on several track-ways made by different species in the Gething Formation of British Columbia. Kool estimated one of these track-ways, representing the ichnospecies Irenichnites gracilis (which may have been made by Deinonychus), to have a walking speed of 10.1 kilometers per hour (6 miles per hour).  http://en.wikipedia.org/wiki/Deinonychus

Deinonychus cannot run as fast as expected because of :
1. Short foot-tibia ratio
2. Relative close pubis and ischium

[ 本帖最後由 Dinosaurprince 於 2009-1-3 04:59 PM 編輯 ]
2009-1-3 04:28 PM#4
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BDGUNDAM
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人有500公斤重吗?
2009-9-25 09:20 PM#5
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fossilshk (Lung)
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500公斤肯定不對
franco 仔資料又錯了....修改一下




2009-9-25 09:25 PM#6
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