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Figure 1


Fig. 1. Lateral and ventral view of the six species possessing free swimbladders and ventral, dorso-lateral (Malapterurus) or side (Trachelyopterichthys) view of the Weberian ossicles. Swimbladders are in blue. Ossicle sizes were standardized and correspond to individuals of the same standard length. Scale bars, 5 cm for fish and 1 mm for ossicles. c, caudal; Cl, claustrum; d, dorsal; Ic, intercalarium; l, lateral; Li, ligamentum interossiculare; m, median; Os, ossicle; r, rostral; Sc, scaphium; Tr, tripus; v, ventral.