Latonia seyfriedi, the type species of the genus Latonia, was described by von Meyer (1843) based on an articulated skeleton from the middle Miocene (Serravallian) of Öhningen, Germany. Besides the holotype, four additional articulated skeletons are known from the type locality; all display only the ventral aspect. A similar frog reported by Lartet (1851) from the middle Miocene of Sansan, France was later assigned to the genus Latonia as L. gigantea based on disarticulated skull roof bones covered with sculpture. In the course of time, similar bones were recovered from numerous localities, but, because the dorsal surface of the cranial roof was not known for L. seyfriedi, they were mostly identified as L. gigantea. The crucial question of whether the skull roof bones of L. seyfriedi, especially the frontoparietal and maxilla, bear sculpture or not remained unresolved until recently, when specimen TMH 8438 from Öhningen was made available for micro-computed tomography (CT) investigations. The present study reveals that the frontoparietal is covered by pustular sculpture as in the L. gigantea neotype, and that the sculpture on the maxillae is similar in both taxa. Since other bones are also similar, we suggest that L. gigantea is a junior synonym of L. seyfriedi. Micro-CT scanning of TMH 8438 made it possible to reconstruct the original positions of the bones. It turned out that the nasals are sculptured and overlapped with the frontal processes of the maxillae as well as with the anterior end of the frontoparietal. This allowed us to reconstruct the shape and proportions of the skull.

中文翻译：

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青蛙Latonia seyfriedi（Anura：Alytidae）的新发现及其对Latonia属的分类的影响

Latonia seyfriedi，属的类型物种Latonia，通过基于来自厄赫宁根，德国的中新世（Serravallian）铰接骨架冯迈耶（1843）中所述。除了整型外，还从类型局部得知了另外四个铰接的骨骼。全部只显示腹侧。从三三的中中新世的拉代（1851）报道了类似的青蛙，法国后来被分配到属Latonia为L.巨基于布满雕塑未组装的头骨骨骼屋顶。在一段时间内，从许多地方都恢复了相似的骨头，但是由于L. seyfriedi不知道颅顶的背面，因此它们大多被鉴定为L. gigantea。直到最近，当Öhningen的TMH 8438标本可用于微型计算机断层扫描（CT）研究时，塞弗里迪氏乳头颅骨，特别是额顶和上颌骨是否承受熊熊雕塑的关键问题仍然没有解决。目前的研究表明，额叶前壁被脓肿雕塑所覆盖，就像巨型L. gigantea的新类型一样，而上颌骨上的雕塑在两个类群中都是相似的。由于其他骨骼也相似，因此我们建议L. gigantea是L. seyfriedi的初级同义词。。TMH 8438的Micro-CT扫描可以重建骨骼的原始位置。事实证明，鼻被雕刻并与上颌骨的额突以及额顶的前端重叠。这使我们能够重建头骨的形状和比例。