Hexangulaconulariids (Cambrian stages 1–2) are an extinct group of medusozoan polyps having a biradially symmetrical, fan-shaped periderm that is distinct from those of medusozoan polyps showing three-, four-, five-, or six-fold radial symmetry. Hexangulaconulariids exhibit substantial variation in gross morphology, including variation in the number of faces on each of the two major sides of the periderm. An intermediate taxon of hexangulaconulariids with ten faces (five on each major side) was expected. Here we describe a new hexangulaconulariid, Decimoconularia isofacialis new genus new species from Bed 5 of the Yanjiahe Formation (Cambrian Stage 2) in the Three Gorges area of Hubei Province, China. The new taxon differs from other hexangulaconulariids (Arthrochites, Hexaconularia, and Septuconularia) mainly in possessing a total of ten faces. The two lateral margins are each marked by a ridge in about the apertural half of the periderm and by a collinear furrow in about the apical half, while the five faces on each major side are bounded by a furrow in about the apertural half and by a collinear ridge in about the apical half. Among hexangulaconulariids, Decimoconularia and Septuconularia may be more closely related to each other than either genus is to Arthrochites or Hexaconularia.UUID: http://zoobank.org/ca270a3b-25ee-4d1f-bdeb-91a963370e70

中文翻译：

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华南寒武纪二期十面六棱科

Hexangulaconulariids（寒武纪 1-2 期）是一组已灭绝的水母息肉，具有双径向对称的扇形周皮，与显示三、四、五或六折径向对称的水母息肉不同。Hexangulaconulariids 在总体形态上表现出很大的变化，包括周皮两个主要侧面的面数的变化。预计会有一个具有十个面（每个主要侧面五个）的六角锥虫的中间分类单元。在这里，我们描述了一种新的 hexangulaconulariid，异面十棱锥虫湖北三峡地区燕家河组（寒武纪二期）第5层新属新种. 新的分类单元不同于其他六棱锥科动物（节肢动物,六棱， 和七鳃鳗) 主要是拥有总共十张面孔。两个侧缘分别在周皮开口的一半左右由一个脊和在顶端一半的共线沟标记，而每个主要侧面的五个面在开口一半附近由一个沟和一个在大约顶端一半的共线脊。在六角形动物中，十棱藻和七鳃鳗可能比任何一个属都更密切相关节肢动物要么六棱.UUID：http://zoobank.org/ca270a3b-25ee-4d1f-bdeb-91a963370e70