FIGURE 1 | Schematic representation of four types of vertebra. In A., only the proximal portion of the ribs is shown. In B., the small bony fragment close to the tip of the transverse process in the left is an underdeveloped rib shown in full. In C., the haemal spine is not fused to the tip of the contralateral transverse processes, which meet each other medially. Notice that in D. the fusion is complete, but the bony ring, present in B. and C., is absent.

Published as part of Deprá, Gabriel de Carvalho, Ota, Renata Rúbia, Vitorino Júnior, Oscar Barroso & Ferreira, Katiane Mara, 2021, Two new species of Knodus (Characidae: Stevardiinae) from the upper rio Tocantins basin, with evidence of ontogenetic meristic changes, pp. 1-28 in Neotropical Ichthyology (Neotrop. Ichthyol.) 19 (1) on page 5, DOI: 10.1590/1982-0224-2020-0106, http://zenodo.org/record/11061527