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Imparfinis arceae Silva, Sabaj Pérez, Carvalho & Oliveira, 2025 |
| Family: | Heptapteridae (Three-barbeled catfishes) | |||
| Max. size: | 6.73 cm SL (male/unsexed) | |||
| Environment: | demersal; freshwater | |||
| Distribution: | South America: Brazil. | |||
| Diagnosis: | Dorsal soft rays (total): 6-6; Anal soft rays: 7-7; Vertebrae: 39-39. This species is distinguished by the following set of characters: wide, dark midlateral stripe from snout tip to caudal peduncle sharply contrasting pale underside and aligned with dark stripe centered on dorsal portion of lower caudal-fin lobe; 11-12 gill rakers on the first ceratobranchial; dark brown W-shaped band at the base of caudal peduncle absent; 39 vertebrae; maxillary barbel surpassing vertical through dorsal-fin origin; short, flexible extension of the pectoral- and dorsal-fin spines, and outermost primary rays of upper caudal-fin lobe absent (Ref. 137469). | |||
| Biology: | This species inhabits fast-flowing, clear-water streams, with marginal vegetation (Ref. 137469). | |||
| IUCN Red List Status: | Not Evaluated (N.E.) Ref. (130435) | |||
| Threat to humans: | harmless | |||