FB-63887 http://www.fishbase.org/summary/SpeciesSummary.php?id=63887 Animalia Chordata Teleostei Gobiiformes Xenisthmidae Xenisthmus Xenisthmus semicinctus Gill & Hoese, 2004 2008-05-29 2008-05-29 Bertaco, V.A., L.R. Malabarba, M. Hidalgo and H. Ortega0 A new species of Hemibrycon (Teleostei: Characiformes: Characidae) from the río Ucayali drainage, Sierra del Divisor, Peru. Neotrop. Ichthyol. 5(3):251-257. (Ref. 75799) Bertaco, V.A. and L.R. Malabarba0 A review of the Cis-Andean species of Hemibrycon Günther (Teleostei: Characiformes: Characidae: Stevardiinae), with description of two new species. Neotrop. Ichthyol. 8(4):737-770. (Ref. 85819) FB-GeneralDescr-63895 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2008-05-30 00:00:00 2024-07-18 00:00:00 Biology http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=63895 Type specimens were collected at the tributaries of río Tapiche which are about 2-3 m wide with crystalline water, 0.3-0.5 m deep, medium water current, sandy substrate, and with moderate amount of riparian vegetation. This species has a typical aquasperm with a spherical to slightly ovoid nucleus , suggesting that the species is non-inseminating. It was not possible to verify the presence of spermatozoa in the ovaries due to the lack of mature females. Mature males possess bony hooks on rays of all fins, except the caudal fin; the presence of which may represent a secondary sexual character (Ref. 75799). Bertaco, V.A. and L.R. Malabarba 2010 A review of the Cis-Andean species of Hemibrycon Günther (Teleostei: Characiformes: Characidae: Stevardiinae), with description of two new species. Neotrop. Ichthyol. 8(4):737-770. (Ref. 85819) FB-DiagnosticDescr-63895 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2008-06-02 00:00:00 2011-02-25 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=63895 This species is distinguished from its congeners by the following characters: a wide black asymmetrical spot covering base of caudal-fin rays, extending along entire length of caudal-fin rays 9 to 12-13 (except H. surinamensis); a black band in the lower half of the caudal peduncle from the region above the last anal-fin rays to the caudal-fin base; 4-5 scale rows below lateral line (vs. 5-9) except from H. mikrostiktos and H. surinamensis (Ref. 75799); differs from H. mikrostiktos by the number of branched anal-fin rays (24-30 vs. 18-21), and from H. surinamensis by the number of scale sheath along anal-fin base (17-22 vs. 12-17), and by the number of cusps in the inner row of the premaxilla teeth (5-7 vs. 4-5) (Ref. 85819). Bertaco, V.A., L.R. Malabarba, M. Hidalgo and H. Ortega 2007 A new species of Hemibrycon (Teleostei: Characiformes: Characidae) from the río Ucayali drainage, Sierra del Divisor, Peru. Neotrop. Ichthyol. 5(3):251-257. (Ref. 75799) FB-Morphology-63895 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2008-06-02 00:00:00 2011-02-25 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=63895 Dorsal soft rays (total): 8; Analsoft rays: 25 - 28; Vertebrae: 38 - 39 Bertaco, V.A., L.R. Malabarba, M. Hidalgo and H. Ortega 2007 A new species of Hemibrycon (Teleostei: Characiformes: Characidae) from the río Ucayali drainage, Sierra del Divisor, Peru. Neotrop. Ichthyol. 5(3):251-257. (Ref. 75799) FB-Distribution-63895 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2008-05-30 00:00:00 2008-06-25 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=63895 South America: Río Ucayali drainage in Peru. Bertaco, V.A., L.R. Malabarba, M. Hidalgo and H. Ortega 2007 A new species of Hemibrycon (Teleostei: Characiformes: Characidae) from the río Ucayali drainage, Sierra del Divisor, Peru. Neotrop. Ichthyol. 5(3):251-257. (Ref. 75799) FB-Uses-63895 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2008-05-30 00:00:00 2024-07-18 00:00:00 Importance http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=63895 fisheries: of no interest FB-Size-63895 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2008-05-30 00:00:00 2024-07-18 00:00:00 Max. size http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=63895 6.8 cm SL (male/unsexed; (Ref. 75799)); 8.16 cm SL (female) Bertaco, V.A., L.R. Malabarba, M. Hidalgo and H. Ortega 2007 A new species of Hemibrycon (Teleostei: Characiformes: Characidae) from the río Ucayali drainage, Sierra del Divisor, Peru. Neotrop. Ichthyol. 5(3):251-257. (Ref. 75799) 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-63895 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2008-05-30 00:00:00 2024-07-18 00:00:00 Environment http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=63895 pelagic; freshwater