“…Species of the second group are: F. (C.) areticulatus (Ermilov, Sandmann, Klarner, Widyastuti et Scheu, 2015); F. (C.) carinodentatus sp. n.; F. (C.) ekaterinae (Ermilov & Friedrich, 2016); F. (C.) kirishimaensis (Hagino et Shimano, 2017) (Ermilov, Sandmann, Klarner, Widyastuti et Scheu, 2015). They are very similar, therefore, despite the identification key to know taxa within subgenus (Ermilov & Corpuz-Raros 2022), we present below Table 2 including a complete set of morphological differences that will allow more clearly distinguishing species with neural ridges on the notogaster.…”