Ruyangosaurus(汝(ru)陽龍(long)),屬的(de)(de)名字來源于正(zheng)型(xing)標本的(de)(de)采集地點河(he)南省汝(ru)陽縣(xian),種名gianteus,希臘詞,非(fei)常大的(de)(de),巨(ju)大的(de)(de),表明汝(ru)陽黃河(he)巨(ju)龍(long)是一個巨(ju)大的(de)(de)蜥腳類(lei)恐龍(long)。
巨型汝(ru)(ru)陽(yang)龍(long)(long)具有神經脊低,缺少椎(zhui)(zhui)(zhui)前(qian)(qian)關(guan)節突(tu)隔板,椎(zhui)(zhui)(zhui)弓的(de)(de)側面具有大(da)的(de)(de)、不規則的(de)(de)三(san)角形凹,前(qian)(qian)關(guan)節橫突(tu)隔板前(qian)(qian)后伸展.脛(jing)骨(gu)粗(cu)(cu)壯,達127cm,發(fa)(fa)掘出的(de)(de)脛(jing)骨(gu)、股骨(gu)、肋骨(gu)和背椎(zhui)(zhui)(zhui)、尾椎(zhui)(zhui)(zhui)均十分粗(cu)(cu)壯。其股骨(gu)長(chang)(chang)達2.35米其單個(ge)背椎(zhui)(zhui)(zhui)椎(zhui)(zhui)(zhui)體直徑達51厘(li)米,比世界(jie)上已(yi)知(zhi)(zhi)最大(da)的(de)(de)恐(kong)(kong)龍(long)(long)——阿根廷龍(long)(long)還長(chang)(chang)1厘(li)米。它身(shen)長(chang)(chang)超過30米,身(shen)高十七米多(duo),體重(zhong)超過100噸,壽命可(ke)達130余歲。它替代(dai)了此前(qian)(qian)河(he)南省地(di)質博物(wu)館發(fa)(fa)現(xian)并展出的(de)(de)亞洲最大(da)的(de)(de)恐(kong)(kong)龍(long)(long)——“汝(ru)(ru)陽(yang)黃河(he)巨龍(long)(long)”,巨型汝(ru)(ru)陽(yang)龍(long)(long)是目(mu)前(qian)(qian)世界(jie)上已(yi)知(zhi)(zhi)最粗(cu)(cu)壯、最重(zhong)的(de)(de)恐(kong)(kong)龍(long)(long)。汝(ru)(ru)陽(yang)龍(long)(long)的(de)(de)發(fa)(fa)現(xian)顯示在晚白堊世早期蜥腳類恐(kong)(kong)龍(long)(long)發(fa)(fa)生的(de)(de)分異程度要(yao)比以(yi)前(qian)(qian)想像(xiang)的(de)(de)高得多(duo),對世界(jie)大(da)恐(kong)(kong)龍(long)(long)演化(hua)研究產生了重(zhong)要(yao)影響。