Epidermal papillae in Heptapterus carmelitanorum, LBP 23577, paratype. a, b. Slender, rod-like papillae are distributed on most of body, such as on the dorsum, between the head and dorsal fin (a) and on the head (b. arrow shows s6+s6 pore); c. Short, club-like papillae are distributed on ventral surface of head.

 
 
  Part of: Deprá GC, Aguilera G, Faustino-Fuster DR, Katz AM, Azevedo-Santos VM (2022) Redefinition of Heptapterus (Heptapteridae) and description of Heptapterus carmelitanorum, a new species from the upper Paraná River basin in Brazil. Zoosystematics and Evolution 98(2): 327-343. https://doi.org/10.3897/zse.98.89413