During their last phase of evolution, the pectiniform conodont elements manifested an evident trend of simplification and miniaturization. This phase started from the late Norian (Sevatian) in the Late Triassic and the evolutionary process of genus Mockina to Parvigondolella, in particular between Mockina bidentata and Parvigondolella andrusovi, is one of the most significant examples. Parvigondolella has been reported worldwide since it was first described in the early 1970s. However, it has recently been suggested that genus Parvigondolella is an ecostratigraphic morphotype of genus Mockina, and thus a phenotype controlled by the environmental conditions, and not an independent taxon. In the Pizzo Mondello Section (Sicily, Italy), transitional forms between M. bidentata and P. andrusovi have been found at different evolutionary stages. We have investigated the oceanic conditions at the time by using redox-sensitive elements (Mn, Fe, V, Cr, and Ni) and seawater temperatures from biogenetic δ¹⁸O_phos to understand the possible environmental influences on the phylogenetic evolution between Mockina and Parvigondolella. The geochemical and isotope analyses indicate that the redox condition and temperature were stable during the evolution of genus Parvigondolella in Pizzo Mondello, confirming that genus Parvigondolella is a real taxon and not a phenotype. A new conodont species named Parvigondolella ciarapicae n. sp. is described here for the first time.

在其进化的最后阶段，果胶状牙形齿元素表现出明显的简化和小型化趋势。这一阶段从三叠纪晚期的诺里安晚期（塞瓦斯蒂安）开始，最重要的例子之一就是Mockina到Parvigondolella的进化过程，特别是Mockina bidentata和Parvigondolella andrusovi之间的进化过程。自1970年代初首次描述帕维戈多内拉以来，全世界已有报道。但是，最近有人提出Parvigondolella属是Mockina属的生态地层形态型。，因此是受环境条件控制的表型，而不是独立的分类单元。在皮佐蒙德罗科（西西里岛，意大利）之间的过渡形式M.牛膝和P. andrusovi已发现在不同的演化阶段。通过使用氧化还原敏感的元件（锰，铁，V，Cr和Ni）和海水温度从生物基因δ我们已经调查了海洋条件在时间^18个Ò _PHOS理解上之间的系统进化可能的环境影响Mockina和Parvigondolella 。地球化学和同位素分析表明，氧化还原条件和温度在属的演化过程中是稳定的。Pizzo Mondello的Parvigondolella证实了Parvigondolella属是真正的分类群而不是表型。一种新的牙形石物种，名为Parvigondolella ciarapicae n。sp。第一次在这里描述。