A new member of Spinosauridae from the Enciso Group (uppermost Barremian–lower Aptian) from Igea (La Rioja, Spain) is here erected on the basis of axial, pelvic girdle, and hindlimb elements that exhibit a unique combination of characters. Riojavenatrix lacustris gen. et sp. nov. is one of the latest Iberian and European spinosaurid taxa. It retains a triangular pubic boot, like the megalosaurids, and a medial condyle of the femur that shows a transitional stage between the anteroposteriorly oriented long axis of non-spinosaurid theropods and the posteromedially oriented long axis of Spinosauridae. The spinosaurid record of Iberia ranges from the late Hauterivian–early Barremian to the latest Barremian–early Aptian so far, and both the oldest and the most recent evidence comes from the Cameros Basin, where spinosaurid remains are especially abundant in the Barremian deposits. A review of the spinosaurid record has allowed us to dismiss the presence of the genus Baryonyx from Iberia; hence, only Camarillasaurus, Iberospinus, Protathlitis, Riojavenatrix gen. nov., and Vallibonavenatrix are considered to be present in the Early Cretaceous of Iberia. According to this study, Riojavenatrix is one of the youngest baryonychines in the fossil record.

中文翻译：

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欧洲兽脚亚目恐龙记录的增加：来自卡梅罗斯盆地（西班牙拉里奥哈）恩西索群的一种新的基础棘龙科。进化意义和古生物多样性

来自伊贾（西班牙拉里奥哈）的恩西索群（最上巴列姆阶 - 下阿普第阶）棘龙科的一个新成员在这里建立在轴、骨盆带和后肢元素的基础上，表现出独特的特征组合。Riojavenatrix lacustris gen. 等 十一月 是最新的伊比利亚和欧洲棘龙类群之一。它保留了像巨龙科一样的三角形耻骨靴和股骨内侧髁，显示出非棘龙类兽脚类恐龙的前后方向长轴和棘龙科的后内侧方向长轴之间的过渡阶段。迄今为止，伊比利亚半岛的棘龙类记录范围从欧特里夫晚期-巴列姆早期到巴列姆晚期-阿普第早期，最古老和最新的证据都来自卡梅罗斯盆地，该盆地的巴列姆沉积中棘龙类遗骸特别丰富。对棘龙科记录的回顾使我们能够排除来自伊比利亚的重爪龙属的存在。因此，只有Camarillasaurus、Iberospinus、Protathlitis、Riojavenatrix gen。11 月和 Vallibonavenatrix 被认为存在于伊比利亚早白垩世。根据这项研究，里奥哈文纳特里克斯是化石记录中最年轻的重甲类动物之一。