F I G U R E 4 in Unravelling the taxonomy of an interstitial fish radiation: Three new species of Gouania (Teleostei: Gobiesocidae) from the Mediterranean Sea and redescriptions of G. willdenowi and G. pigra

F I G U R E 4 Sucking discs and disc-papillae of Gouania species. (a) G. adriatica sp. nov. (PMR VP4618 – Holotype), (b) G. orientalis sp. nov. (PMR VP4585 – Holotype), (c) G. hofrichteri sp. nov. (PMR VP4595 – Holotype), (d) G. pigra (Nardo 1827) (ZSM-PIS-047649 – Other material) and (e) G. willdenowi (Risso 1810) (PMR VP4574 – Neotype). (f) Males of Gouania can have seemingly perfused prominent finger-like extensions on sucking disc edge in region A.A, B and C correspond to disc regions. Photographs by M. Wagner