Ruyangosaurus(汝(ru)陽龍),屬(shu)的(de)名字來源于正型標本的(de)采集地點河南(nan)省汝(ru)陽縣,種(zhong)名gianteus,希臘詞(ci),非常大的(de),巨(ju)大的(de),表明汝(ru)陽黃河巨(ju)龍是一個巨(ju)大的(de)蜥(xi)腳類恐龍。
巨型汝陽(yang)(yang)龍(long)(long)具(ju)有(you)神經脊低,缺少椎(zhui)(zhui)前(qian)(qian)關(guan)節突隔(ge)板,椎(zhui)(zhui)弓的(de)(de)(de)(de)側面具(ju)有(you)大(da)的(de)(de)(de)(de)、不規則的(de)(de)(de)(de)三(san)角(jiao)形凹,前(qian)(qian)關(guan)節橫突隔(ge)板前(qian)(qian)后伸展(zhan).脛(jing)骨(gu)粗壯(zhuang),達127cm,發掘出(chu)的(de)(de)(de)(de)脛(jing)骨(gu)、股(gu)(gu)骨(gu)、肋骨(gu)和背(bei)椎(zhui)(zhui)、尾椎(zhui)(zhui)均(jun)十分粗壯(zhuang)。其股(gu)(gu)骨(gu)長達2.35米(mi)其單個背(bei)椎(zhui)(zhui)椎(zhui)(zhui)體(ti)直徑達51厘(li)米(mi),比世(shi)界上已(yi)知(zhi)最(zui)大(da)的(de)(de)(de)(de)恐(kong)(kong)龍(long)(long)——阿(a)根(gen)廷龍(long)(long)還長1厘(li)米(mi)。它身長超(chao)過30米(mi),身高十七(qi)米(mi)多(duo),體(ti)重超(chao)過100噸,壽命(ming)可達130余歲。它替代了此前(qian)(qian)河南省地(di)質博物館發現(xian)并展(zhan)出(chu)的(de)(de)(de)(de)亞洲最(zui)大(da)的(de)(de)(de)(de)恐(kong)(kong)龍(long)(long)——“汝陽(yang)(yang)黃河巨龍(long)(long)”,巨型汝陽(yang)(yang)龍(long)(long)是目前(qian)(qian)世(shi)界上已(yi)知(zhi)最(zui)粗壯(zhuang)、最(zui)重的(de)(de)(de)(de)恐(kong)(kong)龍(long)(long)。汝陽(yang)(yang)龍(long)(long)的(de)(de)(de)(de)發現(xian)顯(xian)示在晚白堊世(shi)早期蜥腳類(lei)恐(kong)(kong)龍(long)(long)發生的(de)(de)(de)(de)分異程度要比以(yi)前(qian)(qian)想像的(de)(de)(de)(de)高得多(duo),對世(shi)界大(da)恐(kong)(kong)龍(long)(long)演化(hua)研(yan)究產生了重要影(ying)響。