Fig. 2
From: Holding in the stream: convergent evolution of suckermouth structures in Loricariidae (Siluriformes)
Types of unculi. A None is present, Pseudohemiodon almendarizi. B Suction cup, Acanthicus adonis. C Hooks, Ancistrus sp. L464. D Mushrooms, Chaetostoma formosae. E Small mushrooms, Spatuloricaria puganensis. F Honey-combed, Ancistrus megalostomus. G Long filaments, Pseudacanthicus pitanga. H Folds, Hypostomus bolivianus. Scale bars: A, H, E 100 µm; B 150 µm; C, D 15 µm; F 50 µm; G 1 mm