FIGURE 2 in A new species of Hisonotus (Siluriformes: Otothyrinae) from the upper rio Paraná and rio São Francisco basins, Brazil

FIGURE 2. Cleared and stained images showing the variation in abdominal plates. (a) Hisonotus alberti, LBP 10266, 32.1 mm SL, abdomen completely exposed, with absence of dermal plates; (b) H. alberti, LBP 10266, 31.5 mm SL, abdomen with extremely small plate (black arrow) near the urogenital opening; (c) H. chromodontus, LBP 7948, 23.1 mm SL, abdomen partially covered by plates; (d) H. chromodontus, LBP 7948, 27.2 mm SL, abdomen completely covered by plates.