Issue
See Lucena & Menezes (1998) for phylogenetic relationships and Menezes & Lucena (1998) for detailed description.
Environment: milieu / climate zone / depth range / distribution range
Ekologi
; sötvatten bentopelagisk. Tropical
South America: upper Madeira River basin.
Size / Vikt / Age
Maturity: Lm ? range ? - ? cm
Max length : 21.6 cm SL hane/ej könsbestämd; (Ref. 111115); publicerad maxvikt: 209.61 g (Ref. 111115)
Short description
Bestämningsnycklar | Morfologi | Morfometri
Mjukstrålar i ryggfenan (totalt) : 11; Taggstrålar i analfenan: 4 - 5; Mjukstrålar i analfenan: 43 - 47; Ryggkotor: 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
Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver
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: Version 2024-1)
Threat to humans
Harmless
Human uses
Verktyg
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