Radiographs of unbranched dorsal-fin rays. Specimens as a–d in Fig. 2. Arrow shows presence (a–b) or absence (c–d) of smallest anteriormost unbranched ray.

  Part of: Jelić D, Jelić M, Žutinić P, Šimunović I, Zupančič P, Naseka AM (2018) Distribution of endangered Italian gudgeon Romanogobio benacensis (Cypriniformes, Cyprinidae, Gobioninae) with remarks on distinguishing morphological characters. ZooKeys 729: 103-127.