| Family: |
Anostomidae (Headstanders) |
| Max. size: |
18 cm SL (male/unsexed) |
| Environment: |
benthopelagic; freshwater |
| Distribution: |
South America: Rio Tocantins, Brazil. |
| Diagnosis: |
Dorsal soft rays (total): 11-12; Anal soft rays: 9-9. Differs from its congeners by the following characters: one longitudinal and discontinuous
narrow dark brown stripe running inconspicuously from a vertical through middle of dorsal fin to base of caudal peduncle along lateral line; two or three large dark brown vertically elongated blotches along middle trunk: first at the vertical through dorsal-fin, second anterior to adipose fin and third on the caudal peduncle; mainly in young specimens, 12-13 short transversal dark brown bars meeting small dark brown blotches laterally; snout length 39 to 47.6% in head length; orbital diameter 21.4 to 27.8% of head length; body depth 21.6 to 26.0% of SL; sub-inferior mouth (inferior margin of superior lip horizontally aligned with the inferior margin of infraorbital bones); 4 teeth on each premaxillary and dentary; teeth gross incisive-like, forming
an arched cutting edge, decreasing in size from the symphysal largest pair; 40 to 42 scales in the lateral line, 5,5 or 6 scales series above and 5 under lateral line and 16 circumpeduncular series of scales (Ref. 80692).
Description: Dorsal fin ii (iii) + 9 rays; anal fin ii + 7 rays; pectoral fin i + 15 (16) rays; pelvic fin i + 8 (9) rays (Ref. 80692). |
| Biology: |
Distinct pairs breed on densely grown weedy places (Ref. 205). |
| IUCN Red List Status: |
Least Concern (LC); Date assessed: 19 June 2020 Ref. (130435)
|
| Threat to humans: |
harmless |
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