FB-70879 http://www.fishbase.org/summary/SpeciesSummary.php?id=70879 Animalia Chordata Teleostei Beryciformes Melamphaidae Scopeloberyx Scopeloberyx shakhovskoyi Kotlyar, 2024 2025-01-23 2025-01-23 Carvalho, T.P., A.T. Thomaz, A. Urbano-Bonilla and S. Prada-Pedreros0 A new characid species with remarkable sexual dimorphism (Characiformes: Characidae: Stevardiinae) from the upper Guayabero River, Orinocobasin, Colombia. J. Fish Biol. 104(6):1947-1959. (Ref. 132484) FB-GeneralDescr-70888 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2025-01-24 00:00:00 2025-01-24 00:00:00 Biology http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70888 Occurs in shallow waters (< 1 m) of large-to-medium-size streams (< 70 m width) of clear-to-chalky silt colored waters of moderate flow running over sand, pebbles, and rock substrates. Stomach contents include mainly periphytic algae (Bacillariophyceae—Diatoms, Cyanophyceae, Zygnematophyceae, and Rhodophyceae) and rarely some macroinvertebrates (Diptera: Chironomidae larvae); sand grains were also abundant. Associated fish collected which are restricted to the Guaviare River basin include: Creagrutus maculosus, Chrysobrycon guahibo, Tyttocharax metae, Trichomycterus migrans and Schultzichthys gracilis; while other widely distributed species (in the Orinoco basin) were Astyanax metae, Hemibrycon metae, Hemigrammus barrigonae, Knodus cismontanus, Knodus deuterodonoides, Apteronotus galvisi, Cetopsorhamdia orinoco, Chaetostoma chimu, Characidium cf. boavistae, Characidium chupa, Parodon apolinari, Prochilodus mariae, Salminus iquitensis (Ref. 132484). Carvalho, T.P., A.T. Thomaz, A. Urbano-Bonilla and S. Prada-Pedreros 2024 A new characid species with remarkable sexual dimorphism (Characiformes: Characidae: Stevardiinae) from the upper Guayabero River, Orinocobasin, Colombia. J. Fish Biol. 104(6):1947-1959. (Ref. 132484) FB-DiagnosticDescr-70888 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2025-01-24 00:00:00 2025-01-24 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70888 The species is distinguished from all Stevardiinae species by the following set of characters: adult males with enlarged urogenital papilla (length about one-third to half of the first unbranched ray), which is in contact with the first anal-fin unbranched ray and a highly modified anal fin, with enlarged (anteroposteriorly) and distally elongated first and second branched anal-fin rays, forming a gonopodium-like structure; differs from its congenerspresence of an adipose fin (vs. absent); lateral line incomplete, pored scales not reaching the caudal fin (vs. lateral line complete); ascending process of the premaxilla dorsally directed (vs. strongly bent posteroventrally); snout longe, about a fourth of the head length (HL), between 23.1%- 30.0% of HL (vs. short snout, Carvalho, T.P., A.T. Thomaz, A. Urbano-Bonilla and S. Prada-Pedreros 2024 A new characid species with remarkable sexual dimorphism (Characiformes: Characidae: Stevardiinae) from the upper Guayabero River, Orinocobasin, Colombia. J. Fish Biol. 104(6):1947-1959. (Ref. 132484) FB-Morphology-70888 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2025-01-24 00:00:00 2025-01-24 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70888 Dorsal soft rays (total): 7; Analsoft rays: 11 - 13; Vertebrae: 36 - 37 Carvalho, T.P., A.T. Thomaz, A. Urbano-Bonilla and S. Prada-Pedreros 2024 A new characid species with remarkable sexual dimorphism (Characiformes: Characidae: Stevardiinae) from the upper Guayabero River, Orinocobasin, Colombia. J. Fish Biol. 104(6):1947-1959. (Ref. 132484) FB-Distribution-70888 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2025-01-24 00:00:00 2025-01-24 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70888 South America: Colombia. Carvalho, T.P., A.T. Thomaz, A. Urbano-Bonilla and S. Prada-Pedreros 2024 A new characid species with remarkable sexual dimorphism (Characiformes: Characidae: Stevardiinae) from the upper Guayabero River, Orinocobasin, Colombia. J. Fish Biol. 104(6):1947-1959. (Ref. 132484) FB-Uses-70888 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2025-01-24 00:00:00 2025-01-24 00:00:00 Importance http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70888 fisheries: of no interest FB-Size-70888 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2025-01-24 00:00:00 2025-01-24 00:00:00 Max. size http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70888 3.1 cm SL (male/unsexed; (Ref. 132484)); 2.46 cm SL (female) Carvalho, T.P., A.T. Thomaz, A. Urbano-Bonilla and S. Prada-Pedreros 2024 A new characid species with remarkable sexual dimorphism (Characiformes: Characidae: Stevardiinae) from the upper Guayabero River, Orinocobasin, Colombia. J. Fish Biol. 104(6):1947-1959. (Ref. 132484) FB-Threats-2 http://purl.org/dc/dcmitype/Text text/html Belen Acosta 1990-10-18 00:00:00 2024-03-07 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=2 Least Concern (LC) , IUCN Grouper and Wrasse Specialist Group IUCN 2006 2006 IUCN red list of threatened species. www.iucnredlist.org. Downloaded July 2006. FB-Habitat-70888 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2025-01-24 00:00:00 2025-01-24 00:00:00 Environment http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70888 benthopelagic; freshwater; depth range 0 - 1 m (Ref. 132484) Carvalho, T.P., A.T. Thomaz, A. Urbano-Bonilla and S. Prada-Pedreros 2024 A new characid species with remarkable sexual dimorphism (Characiformes: Characidae: Stevardiinae) from the upper Guayabero River, Orinocobasin, Colombia. J. Fish Biol. 104(6):1947-1959. (Ref. 132484)