FB-66633 http://www.fishbase.org/summary/SpeciesSummary.php?id=66633 Animalia Chordata Teleostei Anabantiformes Osphronemidae Betta Betta mahachaiensis Kowasupat, Panijpan, Ruenwongsa & Sriwattanarothai, 2012 2012-10-23 2012-10-25 López-Fernández, H., D.C. Taphorn and E.A. Liverpool0 Phylogenetic diagnosis and expanded description of the genus Mazarunia Kullander, 1990 (Teleostei: Cichlidae) from the upper Mazaruni River, Guyana, with description of two new species. Neotrop. Ichthyol. 10(3):465-486. (Ref. 91746) FB-GeneralDescr-66642 http://purl.org/dc/dcmitype/Text text/html Armi G. Torres 2012-10-30 00:00:00 2024-03-15 00:00:00 Biology http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=66642 Abundant in the entire upper Mazaruni River basin, and especially in tributaries with rocky substrates and rich in rapids. Collected from black water sites with fairly high transparency (0.55-1.0 m Secchi depth), none to relatively fast currents (0-0.6 m/s), temperature (21.7- 24.5°C), pH (4.4-4.8), dissolved oxygen (5.2- 9.3 mg/L) and very low conductivity ( López-Fernández, H., D.C. Taphorn and E.A. Liverpool 2012 Phylogenetic diagnosis and expanded description of the genus Mazarunia Kullander, 1990 (Teleostei: Cichlidae) from the upper Mazaruni River, Guyana, with description of two new species. Neotrop. Ichthyol. 10(3):465-486. (Ref. 91746) FB-DiagnosticDescr-66642 http://purl.org/dc/dcmitype/Text text/html Armi G. Torres 2012-10-30 00:00:00 2012-10-30 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=66642 Distinguished from all congeners, among other characters, by approximately equal uncinate process and anterior arm and reduced anteroventral expansion of epibranchial 1 (vs. uncinate process narrower and complete anteroventral expansion in the other two species), a dorso-ventrally flattened maxillary process of the palatine (vs. cylindrical in the other two species), cycloid (vs. ctenoid) scales in the opercular, postorbital, lateral chest and anal-genital regions, the absence of a mid-lateral spot, and a diffuse dark area covering the dorsal portion of the head giving the impression of a 'black cap'. Possessess a unique juvenile pattern of seven vertical dark bars partially preserved in adults. Bars 3-6 in antero-caudal direction are most visible in juveniles and medium-sized specimens but become fainter and almost disappear in adults. Many specimens show only bar number 3 (midlateral bar) (Ref. 91746). López-Fernández, H., D.C. Taphorn and E.A. Liverpool 2012 Phylogenetic diagnosis and expanded description of the genus Mazarunia Kullander, 1990 (Teleostei: Cichlidae) from the upper Mazaruni River, Guyana, with description of two new species. Neotrop. Ichthyol. 10(3):465-486. (Ref. 91746) FB-Morphology-66642 http://purl.org/dc/dcmitype/Text text/html Armi G. Torres 2012-10-30 00:00:00 2012-10-30 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=66642 Dorsal spines (total): 15 - 17; Dorsal soft rays (total): 8; Analspines: 3; Analsoft rays: 7 - 8; Vertebrae: 26 López-Fernández, H., D.C. Taphorn and E.A. Liverpool 2012 Phylogenetic diagnosis and expanded description of the genus Mazarunia Kullander, 1990 (Teleostei: Cichlidae) from the upper Mazaruni River, Guyana, with description of two new species. Neotrop. Ichthyol. 10(3):465-486. (Ref. 91746) FB-Distribution-66642 http://purl.org/dc/dcmitype/Text text/html Armi G. Torres 2012-10-30 00:00:00 2025-11-05 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=66642 South America: Guyana from the upper Mazaruni River main channel, its direct tributaries, the Kamarang and Kukui Rivers and Abbou creek, and several tributaries of the Kako River, including Waruma, Sandaa and Paikwa creeks. López-Fernández, H., D.C. Taphorn and E.A. Liverpool 2012 Phylogenetic diagnosis and expanded description of the genus Mazarunia Kullander, 1990 (Teleostei: Cichlidae) from the upper Mazaruni River, Guyana, with description of two new species. Neotrop. Ichthyol. 10(3):465-486. (Ref. 91746) FB-Size-66642 http://purl.org/dc/dcmitype/Text text/html Armi G. Torres 2012-10-30 00:00:00 2024-03-15 00:00:00 Max. size http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=66642 8.4 cm SL (male/unsexed; (Ref. 91746)) López-Fernández, H., D.C. Taphorn and E.A. Liverpool 2012 Phylogenetic diagnosis and expanded description of the genus Mazarunia Kullander, 1990 (Teleostei: Cichlidae) from the upper Mazaruni River, Guyana, with description of two new species. Neotrop. Ichthyol. 10(3):465-486. (Ref. 91746) 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-66642 http://purl.org/dc/dcmitype/Text text/html Armi G. Torres 2012-10-30 00:00:00 2024-03-15 00:00:00 Environment http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=66642 benthopelagic; freshwater; pH range: 4.4 - 4.8