| Family: |
Chacidae (Squarehead or angler catfish), subfamily: Stevardiinae |
| Max. size: |
1.74 cm SL (male/unsexed) |
| Environment: |
benthopelagic; freshwater; depth range - 2 m |
| Distribution: |
South America: Brazil and Colombia. |
| Diagnosis: |
Dorsal soft rays (total): 8-9; Anal soft rays: 19-22. This species is distinguished by the following characters: D ii + 8; pelvic-fin rays i + 5; teeth in the inner series of the premaxilla 4; differs from all species of the Stevardiinae by having a single conical tooth in the outer premaxillary series (vs. absent); lacks a pheromone pump usually associated with modified scales on the caudal-fin base; eye large; a line of black chromatophores along the bases of anal and caudal fins; body transparent with abdominal region iridescent blue in life (Ref. 93233). |
| Biology: |
Specimens were caught with a seine pulled at approximately 1.5 m depth. The type locality is a beach on a rocky poorly vegetated plateau, where the water was dark black with slow current. Individuals were collected at night, approximately between 20:00 and 24:00, during the dry season (October). Stomach contents of cleared and stained specimens were mainly remnants of insect larvae (Ref. 93233). |
| IUCN Red List Status: |
Least Concern (LC); Date assessed: 04 March 2021 Ref. (130435)
|
| Threat to humans: |
harmless |
| Country info: |
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