FB-65356 http://www.fishbase.org/summary/SpeciesSummary.php?id=65356 Animalia Chordata Teleostei Anguilliformes Muraenidae Gymnothorax Gymnothorax davidsmithi McCosker & Randall, 2008 2010-03-02 2013-07-23 de Santana, C. D. and R. P. Vari0 New rheophilic species of electric knifefish from the rapids and waterfalls of the Lower Rio Xingu, Brazil (Gymnotiformes: Apteronotidae). Copeia 2010(1):160-164. (Ref. 83662) Saks, L.0 Estonian Common Names, Rank 2. Personal communication (Ref. 116654) Beolens, B., M. Grayson and M. Watkins0 Eponym dictionary of Fishes. Dunbeath, Caithness (Scotland, UK): Whittles Publishing Limited, 1300 p. (Ref. 128868) FB-DiagnosticDescr-65365 http://purl.org/dc/dcmitype/Text text/html Frédéric Busson 2010-03-05 00:12:30 2010-03-05 00:12:30 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=65365 Sternarchogiton zuanoni is diagnosed from S. labiatus in the number of total anal-fin rays (129–153 versus 156–168, respectively), the interorbital width (28.8–39.4% of HL versus 19.5–24.6%, respectively), the body depth (13.3–17.3% of LEA versus 10.3–12.0%, respectively), the coloration of the anal fin (completely hyaline versus the presence of scattered brown speckling and a dark distal margin, respectively), the form of the lower lip (unelaborated versus the presence of a prominent tri-lobed structure, respectively), and the number of rows of conical teeth on the dentary (one versus two rows, respectively). Sternarchogiton zuanoni is distinguished from S. nattereri in the number of total anal-fin rays (129–153 versus 180–198, respectively), the interorbital width (28.8–39.4% of HL versus 19.9–27.6%, respectively), the length of the caudal appendage (22.4– 30.7% of LEA versus 14.6–20.4%, respectively), and the premaxillary dentition (teeth absent versus present in some sexually dimorphic males, respectively). Sternarchogiton zuanoni is diagnosable from S. porcinum in the number of total anal-fin rays (129–153 versus 182–216, respectively), the interorbital width (28.8–39.4% of HL versus 18.8–23.9%, respectively), the head width (46.2–57.3% of HL versus 39.1– 44.6%, respectively), the orbital diameter (9.3–14.1% of HL versus 4.5–7.7%, respectively), the coloration of the pectoral and anal fins (completely hyaline versus with black margins, respectively), and the dorsal profile of the head (distinctly convex versus straight or slightly convex, respectively). Sternarchogiton zuanoni is distinguished from S. preto in the number of total anal-fin rays (129–153 versus 189– 210, respectively), the interorbital width (28.8–39.4% of HL versus 17.8–25.9%, respectively), the orbital diameter (9.3– 14.1% of HL versus 2.9–8.3%, respectively), the coloration of the pectoral and anal fins (completely hyaline versus with black margins, respectively), and the premaxillary dentition (teeth absent versus present, respectively) (Ref. 83662). de Santana, C. D. and R. P. Vari 2010 New rheophilic species of electric knifefish from the rapids and waterfalls of the Lower Rio Xingu, Brazil (Gymnotiformes: Apteronotidae). Copeia 2010(1):160-164. (Ref. 83662) FB-Distribution-65365 http://purl.org/dc/dcmitype/Text text/html Frédéric Busson 2010-03-04 01:11:26 2025-11-05 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=65365 The single known sample of Sternarchogitonzuanoni originated in the rapids and waterfalls of Cachoeira de Kaituká in the Município de Altamira along the lower Rio Xingu in the eastern portions of the Amazon basin (Ref. 83662). de Santana, C. D. and R. P. Vari 2010 New rheophilic species of electric knifefish from the rapids and waterfalls of the Lower Rio Xingu, Brazil (Gymnotiformes: Apteronotidae). Copeia 2010(1):160-164. (Ref. 83662) FB-TrophicStrategy-65365 http://purl.org/dc/dcmitype/Text text/html Frédéric Busson 2010-03-04 01:13:39 2010-03-04 01:13:39 http://creativecommons.org/licenses/by-nc/3.0/ zuanoni Available specimens of Sternarchogiton zuanoniwere captured in Cachoeira de Kaituká at locations in rapids and in pools at the base of waterfalls. Sternarchogiton zuanoni is the sole species known to be associated with rapidlyflowing rivers with rocky beds, whereas the examined samples of other congeners originate from main channels of deep-water rivers, often in benthic settings (de Santana and Crampton, 2007). Three other species of the Apteronotidae, Megadontognathus kaitukaensis (Campos-da-Paz, 1999) and two undescribed species of Sternarchorhynchus (de Santana and Vari, in press), were also captured within Cachoeira de Kaituká (Ref. 83662). de Santana, C. D. and R. P. Vari 2010 New rheophilic species of electric knifefish from the rapids and waterfalls of the Lower Rio Xingu, Brazil (Gymnotiformes: Apteronotidae). Copeia 2010(1):160-164. (Ref. 83662) FB-Size-65365 http://purl.org/dc/dcmitype/Text text/html Frédéric Busson 2010-03-04 00:54:57 2024-03-20 00:00:00 Max. size http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=65365 17.8 cm TL (male/unsexed; (Ref. 83662)) de Santana, C. D. and R. P. Vari 2010 New rheophilic species of electric knifefish from the rapids and waterfalls of the Lower Rio Xingu, Brazil (Gymnotiformes: Apteronotidae). Copeia 2010(1):160-164. (Ref. 83662) 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-65365 http://purl.org/dc/dcmitype/Text text/html Frédéric Busson 2010-03-04 00:54:57 2024-03-20 00:00:00 Environment http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=65365 demersal; freshwater