labyrinthicus, Microdus Kner [R.] 1858:77 [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 30 (no. 13); ref. 13404] Rio Branco and mouth of River Negro, Brazil. Lectotype: NMW 69289.1 (139 mm SL). Paralectotypes: NMW 69289.2-4 (3, with lectotype), 76990 (3, orig. syntypes and non-types, mixed). Appeared in more detail in Kner 1859:149, Pl. 3 [ref. 2631]. Lectotype selected by Vari et al. 1995:25 [ref. 21817]. •Valid as Chilodus labyrinthicus (Kner 1858) -- (Ovchynnyk 1967:31 [ref. 37559]). •Valid as Caenotropus labyrinthicus (Kner 1858) -- (Vari et al. 1995:21 [ref. 21817], Vari & Raredon in Reis et al. 2003:85 [ref. 27061], Scharcansky & Lucena 2007:59 [ref. 29251], Barriga Salazar 2014:106 [ref. 35745], Sarmiento et al. 2014:56, 185 [ref. 35004], Ramos et al. 2014:3 [ref. 35321], Melo et al. 2016:375 [ref. 35317], DoNascimiento et al. 2017:41 [ref. 35633], Urbano-Bonilla et al. 2018:83 [ref. 35773], Silvano et al. 2020:89 [ref. 38133], Meza-Vargas et al. 2021:15 [ref. 39298], Koerber et al. 2022:23 [ref. 39235], Taphorn et al. 2022:19 [ref. 41297], Cortés Hernández et al. 2023:455 [ref. 40760]). Current status: Valid as Caenotropus labyrinthicus (Kner 1858). Chilodontidae. Distribution: South America: Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Suriname and Venezuela. Habitat: freshwater.