FB-68429 http://www.fishbase.org/summary/SpeciesSummary.php?id=68429 Animalia Chordata Teleostei Siluriformes Astroblepidae Astroblepus Astroblepus ardiladuartei Ardila Rodríguez, 2015 Mesobola brevianalis (non Boulenger, 1908) 2017-11-03 2017-11-03 Skelton, P.H.0 A complete guide to the freshwater fishes of southern Africa. Southern Book Publishers. 388 p. (Ref. 7248) Hay, C.J., B.J. van Zyl, F.H. van der Bank, J.T. Ferreira and G.J. Steyn0 The distribution of freshwater fish in Namibia. Cimbebasia 15:41-63. (Ref. 33857) Riddin, M.A., I.R. Bills and M.H. Villet0 Phylogeographic, morphometric and taxonomic re-evaluation of the river sardine, <i>Mesobola brevianalis</i> (Boulenger, 1908) (Teleostei, Cyprinidae, Chedrini). ZooKeys 641:121-150. (Ref. 116496) Skelton, P.H.0 Chapter 11. The freshwater fishes of Angola. p. 207-242. In B.J. Huntley, V. Russo, F. Lages and N. Ferrand (eds.) Biodiversity of Angola. Science & conservation: a modern synthesis. Springer Nature Switzerland AG, Cham, Switzerland. 549 p. (Ref. 120641) Beolens, B., M. Grayson and M. Watkins0 Eponym dictionary of Fishes. Dunbeath, Caithness (Scotland, UK): Whittles Publishing Limited, 1300 p. (Ref. 128868) FB-GeneralDescr-68438 http://purl.org/dc/dcmitype/Text text/html Gert Boden 2017-11-16 21:02:16 2024-01-22 00:00:00 Biology http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=68438 This species appear to favour turbid, rocky, river regions where they can gather in pockets of recirculating currents (Ref. 116496). They feed on drifting invertebrate larvae and adults and plankton (Ref. 116496). Riddin, M.A., I.R. Bills and M.H. Villet 2016 Phylogeographic, morphometric and taxonomic re-evaluation of the river sardine, <i>Mesobola brevianalis</i> (Boulenger, 1908) (Teleostei, Cyprinidae, Chedrini). ZooKeys 641:121-150. (Ref. 116496) FB-DiagnosticDescr-68438 http://purl.org/dc/dcmitype/Text text/html Gert Boden 2017-11-16 00:00:00 2017-11-16 22:19:12 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=68438 Diagnosis: Anal fin extending over three quarters of length of caudal peduncle; caudal peduncle short; operculum entirely, not partially, shiny; body midline silver, not black; iris dark to light grey, not white; head with tubercles along lower jaw and lower head in breeding males; snout rounded; pelvic fin melanophores absent (Ref. 116496).Description: Body elongated, somewhat fusiform, laterally compressed; maximum body depth midway along body; pre-dorsal profile straight or slightly convex behind head (Ref. 116496). Head length 23% of standard length, with tubercles along lower jaw and lower head; snout rounded, short, 29% of head length; mouth terminal, slightly crescent-shaped with long anterior side, reaching anterior border of orbit; nostrils large, level with dorsal margin of eye, separated from orbit by less than one orbit radius; tubular anterior naris short, adjacent to open posterior naris; eye lateral, visible from above and below, more prominent, its diameter 41% of head length (Ref. 116496). First gill arch with 8+3 gill rakers on cerato- and epibranchial arms, respectively; gill rakers long, pointed, widely-spaced; pharyngeal bones in four rows; pharyngeal teeth 5,3,2,1-1,2,3,5, slender and long, falcate (Ref. 116496). Fins large in relation to body size; dorsal fin closer to caudal fin than tip of snout, more or less above origin of anal fin, length 14% of standard length, posterior margin straight, rays soft, anterior-most branched fin ray longest; pectoral fins largest, reaching 1/2 to 3/4 distance to base of pelvic fin, fin lacking lobe at base; pelvic fins reaching 2/3 distance to base of anal fin, relatively small, pointed, fin lacking a basal lobe; anal fin moderately long, extending 2/3 length of caudal peduncle, last unbranched ray longest; ano-genital opening at anterior of base of anal fin; caudal peduncle moderately long, depth half of length; caudal fin forked, lobes pointed, upper lobe shorter (Ref. 116496). Scales small to medium relative to body size, in regular rows, cycloid, radially triate, rounded, slightly elongate; base of anal fin lacking sheath of scales; lateral line present, complete, dipping sharply towards ventral at tip of pectoral fin, joins midline at posterior of caudal peduncle, scale count 51-52 along lateral line, 14 around caudal peduncle (Ref. 116496).Colouration: Live colouration: body without vertical bars or bands; dorsum transparent brown with melanophores concentrated around dorsal fin and caudal peduncle, midline silver; snout darker dorsally; operculum entirely metallic silver; iris white to light grey; dorsal fin membrane clear, rays clear with dark melanophores; caudal fin membrane clear, rays dark brown to black, lighter towards edge, melanophores lighter towards tip; anal fin rays clear, membrane clear, few dark spots above origin, melanophores absent; pectoral fin membrane clear, rays clear, first ray with few dark melanophores; pelvic fin rays clear, membrane clear (Ref. 116496). Preserved colouration: body and head orange with small dark brown spots along dorsal surface, midline and above anal fin; scales on dorsal surface lightly pigmented; ventral scale pigmentation less intense than dorsal; dorsal surface of head lightly pigmented; melanophores small, dark, grouped on rear of head, below orbit, and on lips and snout, along midline, increasing in intensity to caudal fin, browner on dorsal surface, darkening between origin of pectoral and dorsal fin, forming small dark line above anal fin; operculum with silver sheen; side of body with silver sheen extending from pectoral fin to anal fin origin; membranes between fin rays white to clear towards ends; pelvic fin clear membranes and rays; dorsal, caudal and pectoral fin membranes white to clear, rays with small, widely-spaced, melanophores fading towards edges, rays pale brown to clear (Ref. 116496). Riddin, M.A., I.R. Bills and M.H. Villet 2016 Phylogeographic, morphometric and taxonomic re-evaluation of the river sardine, <i>Mesobola brevianalis</i> (Boulenger, 1908) (Teleostei, Cyprinidae, Chedrini). ZooKeys 641:121-150. (Ref. 116496) FB-Morphology-68438 http://purl.org/dc/dcmitype/Text text/html Gert Boden 2017-11-16 00:00:00 2017-11-16 22:19:12 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=68438 Dorsal spines (total): 0; Dorsal soft rays (total): 8 - 10; Analspines: 0; Analsoft rays: 16 - 18; Vertebrae: 38 - 40 Riddin, M.A., I.R. Bills and M.H. Villet 2016 Phylogeographic, morphometric and taxonomic re-evaluation of the river sardine, <i>Mesobola brevianalis</i> (Boulenger, 1908) (Teleostei, Cyprinidae, Chedrini). ZooKeys 641:121-150. (Ref. 116496) FB-Distribution-68438 http://purl.org/dc/dcmitype/Text text/html Gert Boden 2017-11-16 21:06:33 2017-11-16 21:32:34 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=68438 Africa: Kunene River system in Angola and Namibia (Ref. 116496). Riddin, M.A., I.R. Bills and M.H. Villet 2016 Phylogeographic, morphometric and taxonomic re-evaluation of the river sardine, <i>Mesobola brevianalis</i> (Boulenger, 1908) (Teleostei, Cyprinidae, Chedrini). ZooKeys 641:121-150. (Ref. 116496) FB-TrophicStrategy-68438 http://purl.org/dc/dcmitype/Text text/html Gert Boden 2017-11-16 22:34:58 2017-11-16 22:34:58 http://creativecommons.org/licenses/by-nc/3.0/ howesi This species appear to favour turbid, rocky, river regions where they can gather in pockets of recirculating currents (Ref. 116496). Riddin, M.A., I.R. Bills and M.H. Villet 2016 Phylogeographic, morphometric and taxonomic re-evaluation of the river sardine, <i>Mesobola brevianalis</i> (Boulenger, 1908) (Teleostei, Cyprinidae, Chedrini). ZooKeys 641:121-150. (Ref. 116496) FB-Size-68438 http://purl.org/dc/dcmitype/Text text/html Gert Boden 2017-11-16 21:02:16 2024-01-22 00:00:00 Max. size http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=68438 4.3 cm SL (male/unsexed; (Ref. 116496)) Riddin, M.A., I.R. Bills and M.H. Villet 2016 Phylogeographic, morphometric and taxonomic re-evaluation of the river sardine, <i>Mesobola brevianalis</i> (Boulenger, 1908) (Teleostei, Cyprinidae, Chedrini). ZooKeys 641:121-150. (Ref. 116496) 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-68438 http://purl.org/dc/dcmitype/Text text/html Gert Boden 2017-11-16 21:02:16 2024-01-22 00:00:00 Environment http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=68438 benthopelagic; freshwater