Issue
See Lucena & Menezes (1998) for phylogenetic relationships and Menezes & Lucena (1998) for detailed description.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Tropical
South America: upper Madeira River basin.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 21.6 cm SL male/unsexed; (Ref. 111115); max. published weight: 209.61 g (Ref. 111115)
Short description
Identification keys | Morphology | Morphometrics
Dorsal soft rays (total): 11; Anal spines: 4 - 5; Anal soft rays: 43 - 47; Vertebrae: 40. Readily distinguished from the other two species of the genus by having more branched rays on the anal fin (43-47, versus 41-43 in R. ogilviei and 38-41 in R. itupiranga). Hooks are present on the anal fin of adult male specimens of R. itupiranga and in one adult male of R. ogilviei but have not been found in males of R. molossus of comparable sizes.
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | Larvae
Menezes, N.A. and C.A.S. de Lucena, 1998. Revision of the subfamily Roestinae (Ostariophysi: Characiformes: Cynodontidae). Ichthyol. Explor. Freshwat. 9(3):279-291. (Ref. 33012)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Tools
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