| Family: |
Anostomidae (Headstanders) |
| Max. size: |
12.5 cm SL (male/unsexed) |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
South America: Rios Araguaia and Tocantins in Brazil. |
| Diagnosis: |
Dorsal soft rays (total): 10-11; Anal soft rays: 9-9. Differs from other congeners by the following characters: one longitudinal narrow brown stripe running along lateral line, light brown on the first 10-11 scales after opercular opening and dark brown along the posterior remaining scales of lateral line; 11-13 short transverse dark brown bars on dorsum meeting small dark brown blotches; snout length 38.4 to 50.6% in head length; orbital diameter 24.6 to 30.9% in head length; body depth 17.7 to 24.6% of SL; sub- inferior mouth (inferior margin of superior lip horizontally aligned with the inferior margin of orbit); teeth elongated incisive-like and with a fine and straight cutting edge decreasing in size like the steps of stairs from teeth pair of jaw symphysis; 4/4 teeth on each premaxillary and dentary; 42 to 44 scales in the lateral line, 6 scales series above and 5 under the lateral line on the transverse line and 16 circumpeduncular series of scales (Ref. 80692).
Description: Dorsal fin i (ii) + 9 rays; anal fin ii + 7 rays; pectoral fin i + 15 rays; pelvic fin, i + 8 rays (Ref. 80692). |
| Biology: |
Distinct pairs breed on densely grown weedy places (Ref. 205). |
| IUCN Red List Status: |
Least Concern (LC); Date assessed: 09 July 2021 Ref. (130435)
|
| Threat to humans: |
harmless |
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