FB-60490 http://www.fishbase.org/summary/SpeciesSummary.php?id=60490 Animalia Chordata Teleostei Cypriniformes Nemacheilidae Yunnanilus Yunnanilus macrositanus Li, 1999 2003-06-17 2021-04-11 Géry, J. and A. Zarske0 Derhamia hoffmannorum gen. et sp. n. - a new pencil fish (Teleostei, Characiformes, Lebiasinidae), endemic from the Mazaruni River in Guyana. Zool. Abh., Staat. Mus. Tierk. Dresden (52):35-47. (Ref. 47610) Beolens, B., M. Grayson and M. Watkins0 Eponym dictionary of Fishes. Dunbeath, Caithness (Scotland, UK): Whittles Publishing Limited, 1300 p. (Ref. 128868) FB-GeneralDescr-60496 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2003-06-25 00:00:00 2003-11-28 00:00:00 Biology http://creativecommons.org/licenses/by-nc/3.0/ WorldFish Center - FishBase General public http://www.fishbase.org/summary/SpeciesSummary.php?id=60496 http://rs.tdwg.org/ontology/voc/SPMInfoItems#Distribution A shy species (probably the most timorous pencil-fish species), living mainly on the surface and hidden, when possible, under a floating leaf or other hiding possibility. Swims actively, in a fitful manner, the moving of the pectorals is alternative, not symmetric. In captivity, accepts all foods, including dry ones, but only on the surface, neglecting what falls on the bottom. No peculiar nocturnal coloration; no direct courtship was yet observed, only short hunts against each other (within and between sexes) without real fights (Ref. 47610). Géry, J. and A. Zarske 2002 Derhamia hoffmannorum gen. et sp. n. - a new pencil fish (Teleostei, Characiformes, Lebiasinidae), endemic from the Mazaruni River in Guyana. Zool. Abh., Staat. Mus. Tierk. Dresden (52):35-47. (Ref. 47610) FB-DiagnosticDescr-60496 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2003-07-02 00:00:00 2003-07-02 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ WorldFish Center - FishBase General public http://www.fishbase.org/summary/SpeciesSummary.php?id=60496 http://rs.tdwg.org/ontology/voc/SPMInfoItems#Size Elongated body (greatest depth 4.60-5.45 in SL) with a narrow caudal peduncle; symmetrical caudal fin and a dorsal fin far backward. Transverse scales from dorsal to pelvic, 6 or 6.5; predorsal scales 15.5 or 16. Mouth somewhat superior with a short maxilla (apparent length 4.5-5.5 in HL), not quite reaching the level of the eye's front margin. Eyes relatively large. A longitudinal black band surmounted by a light line, from opercle to base of middle caudal rays (Ref. 47610). Géry, J. and A. Zarske 2002 Derhamia hoffmannorum gen. et sp. n. - a new pencil fish (Teleostei, Characiformes, Lebiasinidae), endemic from the Mazaruni River in Guyana. Zool. Abh., Staat. Mus. Tierk. Dresden (52):35-47. (Ref. 47610) FB-Morphology-60496 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2003-07-02 00:00:00 2003-07-02 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ WorldFish Center - FishBase General public http://www.fishbase.org/summary/SpeciesSummary.php?id=60496 http://rs.tdwg.org/ontology/voc/SPMInfoItems#Threats Dorsal spines (total): 2; Dorsal soft rays (total): 8; Analsoft rays: 9 - 10 Géry, J. and A. Zarske 2002 Derhamia hoffmannorum gen. et sp. n. - a new pencil fish (Teleostei, Characiformes, Lebiasinidae), endemic from the Mazaruni River in Guyana. Zool. Abh., Staat. Mus. Tierk. Dresden (52):35-47. (Ref. 47610) FB-Distribution-60496 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2003-06-25 00:00:00 2025-11-05 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ WorldFish Center - FishBase General public http://www.fishbase.org/summary/SpeciesSummary.php?id=60496 http://rs.tdwg.org/ontology/voc/SPMInfoItems#Habitat South America: Mazaruni River, Guyana. Géry, J. and A. Zarske 2002 Derhamia hoffmannorum gen. et sp. n. - a new pencil fish (Teleostei, Characiformes, Lebiasinidae), endemic from the Mazaruni River in Guyana. Zool. Abh., Staat. Mus. Tierk. Dresden (52):35-47. (Ref. 47610) FB-Size-60496 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2003-06-25 00:00:00 2003-11-28 00:00:00 Max. size http://creativecommons.org/licenses/by-nc/3.0/ WorldFish Center - FishBase General public http://www.fishbase.org/summary/SpeciesSummary.php?id=60496 http://rs.tdwg.org/ontology/voc/SPMInfoItems#DiagnosticDescription 6.1 cm SL (male/unsexed; (Ref. 47610)) Géry, J. and A. Zarske 2002 Derhamia hoffmannorum gen. et sp. n. - a new pencil fish (Teleostei, Characiformes, Lebiasinidae), endemic from the Mazaruni River in Guyana. Zool. Abh., Staat. Mus. Tierk. Dresden (52):35-47. (Ref. 47610) 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/ WorldFish Center - FishBase General public http://www.fishbase.org/summary/SpeciesSummary.php?id=2 http://rs.tdwg.org/ontology/voc/SPMInfoItems#Morphology 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-60496 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2003-06-25 00:00:00 2003-11-28 00:00:00 Environment http://creativecommons.org/licenses/by-nc/3.0/ WorldFish Center - FishBase General public http://www.fishbase.org/summary/SpeciesSummary.php?id=60496 http://rs.tdwg.org/ontology/voc/SPMInfoItems#Distribution pelagic; freshwater