顶棘龙属（学名Altispinax）是棘龙科下的一属恐龙，生活于下白垩纪的欧洲，化石发现于德国下萨克森州的奥伯基希砂石层（Obernkirchen Sandstein），地质年代相当于巴列姆阶。过去曾有其他化石被归类于顶棘龙，来自于英格兰、比利时，地质年代从白垩纪早期的凡蓝今阶到阿普第阶，但无法确定属于顶棘龙。

牠的模式种学名为丹氏顶棘龙（A. dunkeri），是在1884年被归类于斑龙的一个种，只根据牙齿而被描述、命名。在1923年，Friedrich von Huene将这个种，命名为独立的属。牠的属名的意思是「高棘」。过去曾有其他已叙述种，现已被分类在其他属中，当中包括了重爪龙。原先被认为跟牙齿有关系的脊椎，目前改属于肉食龙下目的比克尔斯棘龙。因此，顶棘龙一般都被认为是可疑名称。

Altispinax (/ˌæltᵻˈspaɪnæks/; "with high spines") is a dubious genus of large predatory theropod dinosaur from the Early Cretaceous (Barremian) Obernkirchen Sandstein of Niedersachsen, Germany. It is only known from a single tooth. Material has also been referred to it from the Hastings Beds (Valanginian), Purbeck Beds (Early Cretaceous), and Lower Greensand (Aptian) of England, and the Weald Clay (Hauterivian-Barremian) of England and Belgium, but this material probably does not belong to Altispinax. Three back vertebrae with high spines, earlier usually associated with Altispinax and the reason for its name, have later been named as the separate genus Becklespinax.