Brachyhypopomus regani Crampton, de Santana, Waddell & Lovejoy, 2017

Family:  Hypopomidae (Bluntnose knifefishes)
Max. size:  15.6 cm TL (male/unsexed); 14.1 cm TL (female)
Environment:  benthopelagic; freshwater
Distribution:  South America: Brazil, Ecuador, Guyana, Peru, Suriname, and Venezuela. Known from the Amazon basin, Orinoco drainage, the Essequibo River, and some coastal drainages of Guyana.
Diagnosis:  Anal soft rays: 165-205. Brachyhypopomus regani is distinguished from other species of the genus Brachyhypopomus by the following combination of characters: presence of accessory electric organ over opercular region (vs. absence in all congeners except B. bombilla and B. menezesi); dorsal surface with large dark blotches against a lighter background (vs. dorsal surface speckled with small brown chromatophores on a pale background in B. bombilla); and caudal filament length 11.1-17.9% of length to end of anal fin (vs. 24.-33.3% in B. menezesi) (Ref. 116763).
Biology:  Occurs only in high-conductivity whitewater floodplains in floating rafts of macrophytes and leaf litter of newly-inundated forest. Feeds on aquatic insect larvae, microcrustacea, and other small aquatic invertebrates with a predominance of Chironomidae larvae. Spawns in floating macrophytes during the rising and high water period (Ref. 116763).
IUCN Red List Status: Least Concern (LC); Date assessed: 09 September 2020 Ref. (130435)
Threat to humans:  harmless


Source and more info: www.fishbase.org. For personal, classroom, and other internal use only. Not for publication.