FB-70392 http://www.fishbase.org/summary/SpeciesSummary.php?id=70392 Animalia Chordata Teleostei Anguilliformes Synaphobranchidae Dysomma Dysomma formosa Ho & Tighe, 2018 2023-11-10 2023-11-10 Vermeulen, F.B.M. and D.A. Mejia-Vargas0 Two new sympatric species of the aplocheiloid killifish genus <i>Rivulus</i> (s.l.) (Cyprinodontiformes: Rivulidae) from the Alto Rio Negro, Guainía Dpt., Colombia. Killi-Data Series 2020:22-35. (Ref. 130065) FB-GeneralDescr-70401 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2023-11-29 00:00:00 2024-07-18 00:00:00 Biology http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70401 The type locality, a black water creek was located in primary forest under a thick canopy and where water depth was only a few cms, likely due to the flat terrain. The creek is divided into several smaller streams and covered a wide stretch of the forest floor. Rivulus carolinae was taken in leaf litter in the shallowest parts of the stream (Ref. 130065). Vermeulen, F.B.M. and D.A. Mejia-Vargas 2020 Two new sympatric species of the aplocheiloid killifish genus <i>Rivulus</i> (s.l.) (Cyprinodontiformes: Rivulidae) from the Alto Rio Negro, Guainía Dpt., Colombia. Killi-Data Series 2020:22-35. (Ref. 130065) FB-DiagnosticDescr-70401 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2023-11-29 00:00:00 2023-11-29 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70401 Males of Rivulus carolinae n. spec., differ from other minute species in the subgenus Owiyeye, also known as the “rectocaudatus species group”, by the following combination Thus of characters. Body slender and small, dorsal pointed with a small basis, reaching beyond the caudal-fin base; anal fin long but not pointed; pelvic fins exceptional long, reaching from ray 8 to 11 (occasionally to the end of the anal fin base ending) of the anal fin; caudal truncated with straight but “frayed” yellow-white posterior border and reticulated pattern in the central portion; dark stripe starting posterior to the eyes, fading posteriorly on a bright blue background; orange dots on the sides surrounded with fine dark borders; males never express a "Rivulus spot." Females differ by having all fins rounded; a brown nearly black zone, starting posterior of the caudal peduncle covering one-third of the caudal; the dark zone is divided in two by a thin white line reaching from the dorsal- to the ventral border. Females also differ from those of all known congeners by evincing a rust-color on ventral fins and all unpaired fins as well, and a body with red spots surrounded by a thin black margin on a blueish background. A somewhat similar caudal fin pattern is seen on females of Rivulus uakti from the middle Rio Negro. However, in that species the caudal pattern only covers twothirds of the dorsoposterior portion of the caudal. It differs from R. carolinae n. spec., by evincing different body colors and shorter ventral fins and a dark margin at the anal of females caudal fin. The image to the right shows a variation seen in few wild males only and is likely the result of fighting and in the process of regeneration. (Ref. 130065). Vermeulen, F.B.M. and D.A. Mejia-Vargas 2020 Two new sympatric species of the aplocheiloid killifish genus <i>Rivulus</i> (s.l.) (Cyprinodontiformes: Rivulidae) from the Alto Rio Negro, Guainía Dpt., Colombia. Killi-Data Series 2020:22-35. (Ref. 130065) FB-Distribution-70401 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2023-11-29 00:00:00 2023-11-29 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70401 South America: Columbia and possibly in Brazil and Venezuela. Vermeulen, F.B.M. and D.A. Mejia-Vargas 2020 Two new sympatric species of the aplocheiloid killifish genus <i>Rivulus</i> (s.l.) (Cyprinodontiformes: Rivulidae) from the Alto Rio Negro, Guainía Dpt., Colombia. Killi-Data Series 2020:22-35. (Ref. 130065) FB-Uses-70401 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2023-11-29 00:00:00 2024-07-18 00:00:00 Importance http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70401 fisheries: of no interest FB-Size-70401 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2023-11-29 00:00:00 2024-07-18 00:00:00 Max. size http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70401 2.8 cm SL (male/unsexed; (Ref. 130065)); 2.5 cm SL (female) Vermeulen, F.B.M. and D.A. Mejia-Vargas 2020 Two new sympatric species of the aplocheiloid killifish genus <i>Rivulus</i> (s.l.) (Cyprinodontiformes: Rivulidae) from the Alto Rio Negro, Guainía Dpt., Colombia. Killi-Data Series 2020:22-35. (Ref. 130065) 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-70401 http://purl.org/dc/dcmitype/Text text/html Estelita Emily Capuli 2023-11-29 00:00:00 2024-07-18 00:00:00 Environment http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70401 benthopelagic; freshwater