From Bertaco, VA & AR Cardoso, 2005. A new species of Microglanis (Siluriformes: Pseudopimelodidae) from the rio Uruguay drainage, Brazil. Neotropical Ichthyology 3: 61-67.
Key to species of Microglanis from southern Brazil
1. Caudal fin almost completely black, with a narrow vertical white band near middle length of caudal-fin rays; maxillary barbel short, not passing pectoral-fin origin.....
From Shibatta, O. A, and R. C Benine. 2005. A new species of Microglanis Eigenmann, 1912 (Siluriformes: Pseudopimelodidae) from upper rio Parana basin, Brazil. Neotropical Ichthyology, 3 (4): 579-586. https://doi.org/10.1590/S1679-62252005000400015
Key to species of Microglanis from southern Brazil:
1. Squarish head in dorsal view (more pronounced in adults); mouth width 67-85 % HL.....
Sarmento-Soares, LM, RF Martins-Pinheiro, AT Aranda and CC Chamon, 2006. Microglanis pataxo, a new catfish from southern Bahia coastal rivers,northeastern Brazil (Siluriformes: Pseudopimelodidae). Neotropical Ichthyology, 4: 157-166.
Key to species of Microglanis from coastal drainage between Rio de Janeiro and Bahia states:
1. Head width moderately large, ranging between 67.8-87.0% of HL; head and body color pattern mottled in light and dark brown, pectoral, pelvic, and adipose fins light colored or hyaline..... 2
1’. Head width very large, ranging between 96.2-100.0% of SL[sic; HL, not SL]; head and body color pattern mostly black or dark brown, pectoral, pelvic, and adipose fins dark colored.....