FB-66335 http://www.fishbase.org/summary/SpeciesSummary.php?id=66335 Animalia Chordata Teleostei Lophiiformes Lophiidae Lophiodes Lophiodes maculatus Ho, Séret & Shao, 2011 Nijssen's Hypopygus 2011-11-22 2024-03-18 de Santana, C.D. and W.G.R. Crampton0 Phylogenetic interrelationships, taxonomy, and reductive evolution in the Neotropical electric fish genus <i>Hypopygus</i> (Teleostei, Ostariophysi, Gymnotiformes). Zool. J. Linn. Soc. 163:1096-1156. (Ref. 88778) 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-66344 http://purl.org/dc/dcmitype/Text text/html Frédéric Busson 2011-11-29 00:00:00 2011-11-29 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=66344 Hypopygus nijsseni is diagnosed from congeners by the following combination of characters: the total number of anal-fin rays (145–152 versus 102–135 in H. hoedemani, H. lepturus, and H. minissimus; 155–174 in H. cryptogenes), the presence of the sixth infraorbital bone (versus absence in H. hoedemani, H. lepturus, and H. minissimus), the presence of oblique bands (versus absence in H. minissimus), the presence of scales at midbody (versus absence in H. minissimus), the dorsal rami of intermittent branch of anterior lateral line nerve visible as two black parallel lines (versus not visible in H. ortegai), the head length (13.2–15.3% of LEA versus 12.6–13.9 in H. ortegai), the distance at the nape (12.5–13.8% of LEA versus 11.0–12.5 in H. ortegai), the total number of pectoral fin rays (ten to 12 versus 12–16 in H. isbruckeri), the number of scales above the lateral line (five to six versus seven to eight in H. isbruckeri), and the distance from the anus to the anal fin (7.9–9.4% of LEA versus 10.0–12.0 in H. neblinae) (Ref. 88778). de Santana, C.D. and W.G.R. Crampton 2011 Phylogenetic interrelationships, taxonomy, and reductive evolution in the Neotropical electric fish genus <i>Hypopygus</i> (Teleostei, Ostariophysi, Gymnotiformes). Zool. J. Linn. Soc. 163:1096-1156. (Ref. 88778) FB-Distribution-66344 http://purl.org/dc/dcmitype/Text text/html Frédéric Busson 2011-11-29 23:08:07 2025-11-05 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=66344 South America: Hypopygus nijsseni is known only from small streams in the vicinity of Tefé (Ref. 88778). de Santana, C.D. and W.G.R. Crampton 2011 Phylogenetic interrelationships, taxonomy, and reductive evolution in the Neotropical electric fish genus <i>Hypopygus</i> (Teleostei, Ostariophysi, Gymnotiformes). Zool. J. Linn. Soc. 163:1096-1156. (Ref. 88778) FB-TrophicStrategy-66344 http://purl.org/dc/dcmitype/Text text/html Frédéric Busson 2011-11-29 23:17:54 2011-11-29 23:21:22 http://creativecommons.org/licenses/by-nc/3.0/ nijsseni In the Tefé region H. nijsseni was found rarely in small rainforest streams (approximately 1–4 m across and up to 1.5 m deep), where it was found in marginal roots and submerged structures, near conspecifics. A single specimen was found in shallow flooded forest in the floodplain of the Rio Tefé, in the lower reaches of a terra firme stream. Stomach contents (N = 5) contained only autochthonous aquatic invertebrates – mostly Chironomidae larvae, but also the larvae of Ephemeroptera, Coleoptera, and Trichoptera. Hypopygus nijsseni co-occurs syntopically with themuch more abundant H. lepturus without any obvious partitioning of microhabitat or diet. de Santana, C.D. and W.G.R. Crampton 2011 Phylogenetic interrelationships, taxonomy, and reductive evolution in the Neotropical electric fish genus <i>Hypopygus</i> (Teleostei, Ostariophysi, Gymnotiformes). Zool. J. Linn. Soc. 163:1096-1156. (Ref. 88778) FB-Size-66344 http://purl.org/dc/dcmitype/Text text/html Frédéric Busson 2011-11-29 22:58:30 2024-03-18 00:00:00 Max. size http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=66344 9.6 cm TL (male/unsexed; (Ref. 88778)) de Santana, C.D. and W.G.R. Crampton 2011 Phylogenetic interrelationships, taxonomy, and reductive evolution in the Neotropical electric fish genus <i>Hypopygus</i> (Teleostei, Ostariophysi, Gymnotiformes). Zool. J. Linn. Soc. 163:1096-1156. (Ref. 88778) 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-66344 http://purl.org/dc/dcmitype/Text text/html Frédéric Busson 2011-11-29 22:58:30 2024-03-18 00:00:00 Environment http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=66344 benthopelagic; freshwater