A rare window into a back-reef fish community from the middle Miocene (late Badenian) Medobory Hills barrier reef in western Ukraine, reconstructed mostly by means of otoliths Author Schwarzhans, Werner Natural History Museum of Denmark, Zoological Museum, Universitetsparken 15, 2100 Copenhagen, Denmark Author Klots, Oleksandr Author Ryabokon, Tamara Author Kovalchuk, Oleksandr text Swiss Journal of Palaeontology 2022 18 2022-11-17 141 1 1 35 http://dx.doi.org/10.1186/s13358-022-00261-3 journal article 10.1186/s13358-022-00261-3 1664-2384 11999827 Onogadus simplicissimus ( Schubert, 1906 ) Figure 3c–f 1906 Otolithus ( Crenilabrus ) simplicissimus —Schubert: pl. 18, figs. 43, 44. 2015 Onogadus simplicissimus ( Schubert, 1906 ) —Bratishko et al.: figs. 4.6–12 (and references therein). Material 8 otoliths: 1 specimen , Kozatskyi Yar, NMNHU-P PI 2571 ; 2 specimens , Mlyntsi, NMNHU-P PI 2572 ; 5 specimens , Shydlivshchyna, NMNHU-P PI 2573 and NMB P1220 . Discussion Tis species was redefined, described in detail, and compared to extant species in Bratishko et. al. (2015). Onogadus simplicissimus is apparently endemic to the Central and Eastern Paratethys, where it occurs from the late Badenian/Konkian to the Bessarabian (Bratishko et al., ongoing research).