亞種分布
奧尼拉斯·諾瓦斯(Fernando Novas)與塞巴斯蒂(di)安(an)·阿(a)派斯特圭(Sebastian Apesteguia)在2003年(nian)的研(yan)究顯示速龍(long)(long)(long)是(shi)惡龍(long)(long)(long)的近親,而惡龍(long)(long)(long)是(shi)種奇(qi)特的角鼻龍(long)(long)(long)類恐(kong)龍(long)(long)(long)。這兩個屬(shu)可能形成一個速龍(long)(long)(long)亞(ya)科(Velocisaurinae),屬(shu)于西(xi)北阿(a)根廷(ting)龍(long)(long)(long)科。
注意,速龍(long)有時會與(yu)伶盜龍(long)(Velociraptor)混淆,后者(zhe)可(ke)能是(shi)原(yuan)始(shi)鳥類(lei),與(yu)速龍(long)相(xiang)差(cha)甚遠。
形態特征
速龍(long)(屬名:Velocisaurus)意(yi)為“快速的(de)蜥蜴”,是(shi)種角鼻龍(long)下目(mu)恐龍(long),生存于(yu)白(bai)堊(e)紀的(de)阿根廷。
速龍(long)身長可能(neng)約4尺(feet)。目前(qian)僅發(fa)現后腿骨頭,從后腿與腳(jiao)掌顯示它們適合(he)奔跑,因此取名(ming)為速龍(long)。