Louse flies (Diptera: Hippoboscidae) of Romania: New records and novel host–parasite and hyperparasites associations

This study presents records of ectoparasitic flies from the family Hippoboscidae collected in Romania between 2022 and 2024. A total of seven species were recorded, with <i>Pseudolynchia canariensis</i> (Macquart in Webb and Berthelot, 1839) representing a new record for the fauna of Romania. To the best of the authors' knowledge, many of the parasite-host associations are new and are previously unpublished. In addition, a graphical network illustrating these associations is provided. This network highlights the frequency and diversity of host-parasite interactions across the study sites. The recorded phoresis of <i>Guimaraesiella</i> (Mallophaga) on <i>Ornithomya avicularia</i> (Linnaeus, 1758) and the hyperparasites <i>Hemimyialges macdonaldi</i> (Evans et al., 1963) and <i>Myialges anchora</i> Sergent and Trouessart, 1907 (both Acariformes: Epidermoptidae) on <i>Ornithoica turdi</i> (Olivier in Latreille, 1811) are newly documented in Romania.