FB-64751 http://www.fishbase.org/summary/SpeciesSummary.php?id=64751 Animalia Chordata Teleostei Gobiiformes Gobiidae Rhinogobius Rhinogobius longyanensis Chen, Cheng & Shao, 2008 2008-11-14 2024-03-21 Hardman, M. and M.L.J. Stiassny0 A sexually dimorphic species of <i>Chrysichthys</i> (Siluriformes: Claroteidae) from Lac Mai-Ndombe, Democratic Republic of the Congo. Ichthyol. Explor. Freshwat. 19(2):175-184. (Ref. 78725) FB-GeneralDescr-64761 http://purl.org/dc/dcmitype/Text text/html Gert Boden 2008-11-18 21:45:11 2024-03-21 00:00:00 Biology http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=64761 Lac Mai-Ndombe is a 'blackwater' lake with an acidic pH (4.0-5.5); maximum depth is 10 m; limits increase dramatically during seasonal rains; C. praecox is a small claroteid catfish with marked secondary sexual dimorphism; matures at small size (Ref. 78725). Hardman, M. and M.L.J. Stiassny 2008 A sexually dimorphic species of <i>Chrysichthys</i> (Siluriformes: Claroteidae) from Lac Mai-Ndombe, Democratic Republic of the Congo. Ichthyol. Explor. Freshwat. 19(2):175-184. (Ref. 78725) FB-DiagnosticDescr-64761 http://purl.org/dc/dcmitype/Text text/html Gert Boden 2008-11-18 22:06:18 2008-11-18 22:06:18 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=64761 This species is distinguished from other Chrysichthys by having vomerine accessory toothplates forming a smooth arc, narrowly separated in midline and broadening posteriorly in adult males; narrow and sharply pointed supraoccipital process; upper jaw extending beyond lower jaw; strong postcleithral process; maxillary barbel length 2,7-4,8 times in standard length; nasal barbel reaching the orbit; uniformly dark pigmentation; and 14-19 gill rakers on the first gill arch (Ref. 78725). Hardman, M. and M.L.J. Stiassny 2008 A sexually dimorphic species of <i>Chrysichthys</i> (Siluriformes: Claroteidae) from Lac Mai-Ndombe, Democratic Republic of the Congo. Ichthyol. Explor. Freshwat. 19(2):175-184. (Ref. 78725) FB-Distribution-64761 http://purl.org/dc/dcmitype/Text text/html Gert Boden 2008-11-18 21:50:36 2014-06-04 17:53:24 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=64761 Africa: only known from Lake Mai-Ndombe (middle Congo River basin), Democratic Republic of the Congo (Ref. 78725). Hardman, M. and M.L.J. Stiassny 2008 A sexually dimorphic species of <i>Chrysichthys</i> (Siluriformes: Claroteidae) from Lac Mai-Ndombe, Democratic Republic of the Congo. Ichthyol. Explor. Freshwat. 19(2):175-184. (Ref. 78725) FB-Size-64761 http://purl.org/dc/dcmitype/Text text/html Gert Boden 2008-11-18 21:45:11 2024-03-21 00:00:00 Max. size http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=64761 6.3 cm SL (male/unsexed; (Ref. 78725)) Hardman, M. and M.L.J. Stiassny 2008 A sexually dimorphic species of <i>Chrysichthys</i> (Siluriformes: Claroteidae) from Lac Mai-Ndombe, Democratic Republic of the Congo. Ichthyol. Explor. Freshwat. 19(2):175-184. (Ref. 78725) 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-64761 http://purl.org/dc/dcmitype/Text text/html Gert Boden 2008-11-18 21:45:11 2024-03-21 00:00:00 Environment http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=64761 demersal; freshwater