模式種是威施曼氏南極龍(A. wichmannianus),是由休尼(Friedrich von Huene)在1929年命名,身長18公尺,他在同一年命名了第二個種巨大南極龍(A. giganteus),體型非常巨大。之後另有三個種被命名,近年的研究指出牠們都不屬於南極龍。南極龍的肩膀可能高達5公尺。
命名
南極龍的化石首先在1916年被研究,直至1929年才由古生物學家休尼(Friedrich von Huene)詳細的描述及命名[2]。南極龍的屬名在古希臘文並非表示南極洲,而是指「北方的相反」,因為牠是於阿根廷被發現,而阿根廷與南極洲的名字都具有「北方的相反」的意思。。
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