Tucanoichthys tucano, specimen TCWC 20316.01, 14.4 mm SL, c&s. A. Weberian apparatus, left side, lateral view. B. Weberian apparatus, left side, lateral view, neurocranium separated from vertebral column. C. Same as A, oblique dorso-lateral view. D. Dissected scaphium, intercalarium and tripus of left side. Abbreviations: Ic, intercalarium; IOs, inner arm of the os suspensorium; LP2, lateral process of vertebral centrum 2; NA3–5, neural arch 3–5; OOs, outer arm of the os suspensorium; Par, parapophysis; R5, rib 5; Sc, scaphium; Sn3, supraneural 3; Soc, supraoccipital; Tr, tripus; V1–5, vertebral centrum 1–5.

 
 
  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