Knodus obolus Deprá, Ota, Vitorino Júnior & Ferreira, 2021: 14, fig. 3.

Holotype (Fig. 3): NUP 22667, 46.4 mm SL: Brazil, Goiás, Pirenópolis, ribeirão Dois Irmãos, tributary to the rio do Peixe, tributary to the rio das Almas, tributary to the rio Maranhão, tributary to the rio Tocantins, 15°42’50”S, 49°2’39”W, O. Vitorino Júnior, 24 Apr 2017.

Paratypes: 2 lots, 30 specimens —NUP 22663, 7, 38.1–52.7 mm SL: Brazil, Goiás, Pirenópolis, ribeirão Dois Irmãos, tributary of rio do Peixe, tributary of rio das Almas, tributary of rio Maranhão, tributary of rio Tocantins, 15°42’50”S, 49°2’54”W, elevation 702 m, G.C. Deprá & O. Vitorino Júnior, 12 Dec 2016. NUP 22668, 23, 23.0– 56.8 mm SL: collected with holotype .