Figure 1 from: Sullivan J, Zuanon J, Cox Fernandes C (2013) Two new species and a new subgenus of toothed Brachyhypopomus electric knifefishes (Gymnotiformes, Hypopomidae) from the central Amazon and considerations pertaining to the evolution of a monophasic electric organ discharge. ZooKeys 327: 1-34. https://doi.org/10.3897/zookeys.327.5427

Figure 1 - Upper jaw in ventral view of cleared and stained specimen of Brachyhypopomus (Odontohypopomus) walteri sp. n. (ANSP 194025) showing teeth present on the premaxillae. PMX=premaxilla, MX=maxilla, MET=mesethmoid, PAL=ossified element within palatine cartilage (not stained), VET=ventral ethmoid.