Figure 2 from: Wielstra B, Bozkurt E, Olgun K (2015) The distribution and taxonomy of Lissotriton newts in Turkey (Amphibia, Salamandridae). ZooKeys 484: 11-23. https://doi.org/10.3897/zookeys.484.8869

Figure 2 - Example of the two morphological types comprising the Lissotriton vulgaris group of newts. Shown (not to scale) are a typical kosswigi male (A) and a typical schmidtleri male (B). Notice the shape of the doral fin (smooth in kosswigi and ragged in schmidtleri), the position where the dorsal fin starts (approximately above the forelimbs in kosswigi and at the back of the head in schmidtleri), the presence of a thread-like tail filament (found in kosswigi but not in schmidtleri) and the extensiveness of the fringing on the feet (with kosswigi having much more flappy feet than schmidtleri).