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Phenacorhamdia anisura (Mees, 1987) |
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photo by
DoNascimiento, C. |
| Family: | Heptapteridae (Three-barbeled catfishes) | |||
| Max. size: | 4 cm SL (male/unsexed) | |||
| Environment: | demersal; freshwater | |||
| Distribution: | South America: Orinoco River basin, Venezuela. | |||
| Diagnosis: | Dorsal soft rays (total): 7-7; Anal soft rays: 12-15; Vertebrae: 41-43. This species differs from its congeners by the following set of characteristics: maxillary barbel reaching three fourths along pectoral fin; outer mental barbel not reaching pectoral-fin base; gill rakers on first branchial arch 5-7; vertebrae 41-43; pleural ribs 9; pectoral fin with modally seven branched rays; first basal radial of dorsal fin inserted posterior to vertebrae 11-12; anal fin with 12-15 rays (7-9 branched); caudal-fin lobes pointed; upper caudal-fin lobe with 7 branched rays; lower caudal-fin lobe markedly longer than upper caudal-fin lobe (29.8-33.5% of SL, 1.5 times in HL); pigmentation of the body uniform; cleithral width, 13.6-14.5% of SL; anal-fin base, 12.1-14.8% of SL; caudal peduncle depth, 5.7-6.9% of SL; head length, 20.1-22.2% of SL, 4.5-4.9 times in SL (Ref. 78618). | |||
| Biology: | Inhabits rivers (Ref. 6868). | |||
| IUCN Red List Status: | Least Concern (LC); Date assessed: 07 October 2020 Ref. (130435) | |||
| Threat to humans: | harmless | |||