Fig. 4

Characiformes and Cichliformes fishes from the Iquitos assemblage. A1–C2 Right premaxillary (A1–A2: PIMUZ A/I 4810), and symphyseal teeth (B1–B2: PIMUZ A/I 4812; C1–C2: PIMUZ A/I 4813A) of Colossoma cf. C. macropomum. D1–D2 Symphyseal mandibular tooth of cf. Mylossoma sp. (PIMUZ A/I 4818). E–J2 left operculum (E: PIMUZ A/I 4811), circumorbital (F) and frontal? (G) bones (PIMUZ A/I 5009), and molariform-like teeth of indet. “pacu” or “Myleus” clades (H1–H2: PIMUZ A/I 4813B; I1–I2: PIMUZ A/I 5008; J1–J2: PIMUZ A/I 4814). K1–L cf. Serrasalmus sp. teeth (PIMUZ A/I 4826). M Recent tooth of Serrasalmus neveriensis (PIMUZ A/I 5058). N1–O2 Left dentary (N1–N3: PIMUZ A/I 4979), and right premaxilla (O1–O2: PIMUZ A/I 4981) of indet. cichlids. Views: dorsal (G), labial (B2, C2, D2, J1, K1, M), lingual (H1, L), lateral (F, H2, I2, J2, K2), left lateral (E, N2), right lateral (A1, O1), occlusal (B1, C1, D1, I1, N1), and ventral (A2, N3, O2)