A primeira espécie de Microglanis da calha do rio Amazonas, estado do Amazonas, Brasil é descrita. Essa espécie difere de todas as congêneres pela nadadeira caudal bifurcada e padrão de colorido da região supraoccipital constituído por duas manchas elípticas claras e justapostas, além de uma combinação de caracteres morfométricos.
| Characters | Holotype | Min.-Max. | Mean± SD |
| Standard length (mm) | 27.7 | 20.8-27.7 | 23.7±2.2 |
| Percents of SL | |||
| Head length | 29.7 | 27.4-30.0 | 28.4±1.1 |
| Pelvic fin length | 19.3 | 15.8-20.1 | 18.0±1.3 |
| Dorsal spine length | 15.9 | 11.4-15.9 | 13.0±1.4 |
| Pectoral spine length | 19.2 | 15.5-19.2 | 16.9±1.2 |
| Posterior cleithral process length | 11.9 | 9.6-14.5 | 11.8±1.7 |
| Predorsal length | 38.6 | 35.5-38.6 | 37.1±1.1 |
| Preventral length | 54.4 | 49.5-54.4 | 52.1±1.7 |
| Preanal distance | 72.5 | 68.1-74.1 | 70.9±2.1 |
| Caudal peduncle depth | 11.2 | 9.9-11.3 | 10.8±0.4 |
| Caudal peduncle length | 12.2 | 9.9-17.7 | 14.4±3.0 |
| Body width | 30.4 | 26.4-30.4 | 27.6±1.4 |
| Dorsal-fin base length | 13.5 | 9.7-14.4 | 13.0±1.4 |
| Adipose-fin base length | 16.6 | 13.1-16.6 | 14.6±1.1 |
| Anal-fin base length | 12.2 | 9.5-12.9 | 11.0±1.0 |
| Percents of HL | |||
| Interorbital length | 44.2 | 40.4-44.2 | 42.0±1.3 |
| Eye diameter | 9.8 | 8.0-9.8 | 9.1±0.7 |
| Snout length | 43.8 | 38.3-43.8 | 40.8±2.1 |
| Mouth width | 44.4 | 38.0-47.3 | 43.4±2.4 |
| Maxillary barbel length | 104.1 | 89.4-104.1 | 96.7±4.7 |
| CV1 (81.11%) | CV2 (16.47%) | |
| Head length | -0.14042 | -0.1891 |
| Interorbital distance | 0.10768 | 0.43904 |
| Eye diameter | -0.11396 | -0.19571 |
| Snout length | -0.014809 | 0.41971 |
| Mouth width | 0.10935 | 0.07983 |
| Maxillary barbel length | 0.023589 | 0.26127 |
| Anal fin length | -0.072884 | 0.050899 |
| Dorsal spine length | -0.069149 | 0.13113 |
| Pectoral spine length | 0.10587 | 0.31419 |
| Humeral process length | -0.037374 | 0.0036545 |
| Predorsal distance | -0.11807 | 0.060669 |
| Preventral distance | -0.088499 | -0.073199 |
| Preanal distance | 0.34928 | -0.38767 |
| Caudal peduncle height | -0.084459 | -0.26858 |
| Caudal peduncle length | -0.059994 | 0.10492 |
| Body width | -0.073092 | -0.2741 |
| Dorsal-fin base length | -0.061181 | 0.023965 |
| Adipose-fin base length | -0.061677 | 0.10203 |
| Anal-fin base length | -0.011569 | -0.18645 |
