Fig. 1
From: Holding in the stream: convergent evolution of suckermouth structures in Loricariidae (Siluriformes)
A–D Suckermouths of selected taxa. A Ancistrus sp. L464. B Baryancistrus xanthellus. C Panaque nigrolineatus. D Chaetostoma formosae. The highlighted region was documented by SEM to study the papillae and unculi. E–H Types of papillae. E Flat type, Pseudohemiodon almendarizi. F Short type, Ancistrus sp. L464. G Medium type, Acanthicus adonis. H Long type, Hypancistrus sp. L333. The sizes of the insets relate the sizes of the papillae to another. Scale bars: A 6 mm; B 6.5 mm; C 10.5 mm; D 9 mm; E, F 100 µm; G, H 250 µm