Barbus petenyi Heckel, 1852

Iftime, Alexandru & Oţel, Vasile, 2025, An annotated systematical checklist of the Romanian ichthyofauna, Zootaxa 5654 (1), pp. 1-64 : 11

Barbus petenyi Heckel, 1852

A native, widespread freshwater species, found in rivers in the montane and hill areas, in both intra- and extra-Carpathian drainages: MureȘ, TimiȘ, Olt, ArgeȘ, Ialomița ( Bănărescu 1964 [as B. meridionalis petenyi ]; Kotlík et al., 2002; Iftime, 2004; Cocan & MireȘan 2018; Nagy et al. 2023).

See Iftime 2004 for evidence for reproductive incompatibility for at least B. balcanicus and B. petenyi . The exact limit between the range of B. petenyi (known to occur in the Ialomița— Kotlík et al. 2002) and B. carpathicus (known to occur in the upper Siret and Prut drainages in Ukraine — Roman 2013; Roman 2015 —and doubtlessly occurring in the Romanian drainage of those rivers as well) is unknown; while B. carpathicus most likely ranges throughout the Siret and Prut drainages, it is not impossible that B. petenyi be found in the lower Siret tributaries (such as the Buzău or Putna).

Fam. Xenocyprididae

Hypophthalmichthys molitrix (Cuvier et Valenciennes, 1844)

A non-native species, found in aquaculture (with occasional escapes) and frequently stocked for commercial fishing; unassisted reproduction was documented in the Danube and its Delta at least in some favourable years, but stocking and escape from farms also occur (StaraȘ & Oțel 1999; Iftime & Iftime 2021; Jawdhari et al 2022; Năstase et al. 2022; Năstase & Năvodaru 2023; see also Drăgan et al. 2024, who, however, miss the Danube Delta in the given distribution).