Abstract—

The first kotlassiid species of the Vyazniki Faunal Assemblade, Microphon terminalis sp. nov., is described from the terminal Permian of the Bykovka locality (Vladimir Region, Russia). The diagnostic characters of M. terminalis are the preservation of nasolacrimal duct throughout ontogeny and some features of the marginal teeth, such as the moderately thickened proximal parts of the crowns, sharply lingually recurved apices, presence of narrow shoulder-like projections of the cutting edges and strongly ornamented enamel. The tooth shape and the location of crista paraquadrata of the squamosal indicate that M. gracilis can be regarded as an ancestral species for M. terminalis that is confirmed by stratigraphic data. The dentition morphology suggests carnivorous mode of life of M. terminalis and show the prevalence of strongly chitinized invertebrates in its diet. This corresponds to the general evolutional trend in the Kotlassiidae (the abandonment of obligate algophagy as a general trophic specialization and the expansion of feeding preferences).

中文翻译：

---

来自东欧二叠纪末世的一种新的科特氏（两栖类，Seymouriamorpha）

摘要-

Vyazniki Faunal组合的第一个kotlassiid物种，Microphon terminalis sp。nov。，是从Bykovka地区（俄罗斯弗拉基米尔州）的二叠纪终端进行描述的。M的诊断特征。终末期是整个个体发育过程中鼻泪管的保存以及边缘牙齿的某些特征，例如冠部的中度增厚的近端部分，尖锐的舌尖弯曲的前缘，切刃的窄肩状突起和强烈装饰的珐琅质。齿形状和鳞的嵴paraquadrata的位置表明，M.眼虫可以被认为是一个祖先物种M.终地层数据证实了这一点。牙列形态表明终端食分枝杆菌的食肉性生活模式，并显示其饮食中强几丁质无脊椎动物的流行。这与Kotlassiidae的总体进化趋势相对应（放弃作为专门的营养专业化的专性算法和扩大喂养偏好）。