Successive growth stages of P1-elements in the Middle to early Late Triassic species Pseudofurnishius murcianus allows the observation of a detailed ontogeny. Besides the gradual enlargement of its curved blade and the growing number of its denticles, a small internal platform develops, eventually followed by an external one, both bearing denticles. The number of denticles on the blade and internal platform increases from five and one in the smallest specimens, respectively, to 14 and 9 in fully developed ones, whereby the distribution pattern of platform-denticles, on the inner one in particular, is of great morphological variety. For the orientation of the P1-element of P. murcianus, the comparison of the early development stages of Pseudofurnishius and Sephardiella, that share a common ancestry, permits to adhere to the orientation used by Diebel rather than to the one proposed by Van den Boogaard.

中文翻译：

---

关于 Pseudofurnishius murcianus Van den Boogaard 三叠纪牙形石 P1 元素的个体发育和定向，1966

Pseudofurnishius murcianus 中到晚三叠世物种 Pseudofurnishius murcianus 中 P1 元素的连续生长阶段允许观察详细的个体发育。除了其弯曲的刀片逐渐扩大和细齿数量不断增加之外，还会形成一个小的内部平台，最终形成一个外部平台，两个平台都带有细齿。叶片和内部平台上的小齿数从最小样本的5个和1个增加到完全发育的14个和9个，其中平台小齿的分布模式，尤其是内侧的，分布非常大。形态多样性。对于 P. murcianus 的 P1 元素的定位，Pseudofurnishius 和 Sephardiella 的早期发育阶段的比较，具有共同的祖先，