Tucanoichthys tucano, specimen MZUSP 18388, 15.6 mm SL, c&s (A), and TCWC 20316.01, 14.4 mm SL (B, D, E, G), 14.6 mm SL (C, F), c&s. A. Pectoral fin and girdle, right side, lateral view (image reversed). B. Dissected pectoral radials, right side, lateral view (image reversed). C. Dissected pectoral radials, right side, lateral view (image reversed). D. Elements of scapulo-coracoid cartilage, right side, medial view. E. Pelvic fin and girdle, dorsal view. F. Pelvic radials, right side, oblique ventral view (image reversed). G. Scale from side of abdomen. Pectoral distal radials and Pectoral distal radial cartilages (B, C,) and pelvic radials (F) outlined by thin white dashed line. Abbreviations: Bp, basipterygium; Ci, circulus; Cl, cleithrum; Cor, coracoid; FR, fin ray; IsP, ischiac process; Mcor, mesocoracoid; Pcl2–3, postcleithrum 2–3; PDR, pectoral distal radial; PDRC, pectoral distal radial cartilage; PR1–4, pectoral radial 1–4; Ps, pelvic splint; Pt, posttemporal; PvR, pelvic radial; Sc, scapula; Scl, supracleithrum; SF, scale focus.

  Part of: Mattox GMT, Conway KW (2021) Osteology of Tucanoichthys tucano Géry and Römer, an enigmatic miniature fish from the Amazon basin, Brazil (Teleostei: Characiformes: Characidae). Vertebrate Zoology 71: 645-667. https://doi.org/10.3897/vz.71.e71886