FB-70983 http://www.fishbase.org/summary/SpeciesSummary.php?id=70983 Animalia Chordata Teleostei Gymnotiformes Hypopomidae Microsternarchus Microsternarchus javieri Pinilla, Cox Fernandes & Alves-Gomes, 2025 2025-03-17 2025-03-17 Sideleva, V.G. and Z.V. Zhidkov0 Description of a new species of <i>Cottus</i> Linnaeus (Cottidae) from the Western Dvina / Daugava River system, Baltic Sea basin, based on integrative taxonomy. Zootaxa 5447(4):473-495. (Ref. 132919) FB-DiagnosticDescr-70993 http://purl.org/dc/dcmitype/Text text/html Trisha Marie Santos 2025-03-21 00:00:00 2025-06-04 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70993 This species is distinguished from its congeners by the following set of characters: head pointed anteriorly and considerably flattened in dorso-ventral direction; dermal papillae on top and sides of head; large bony prickles under pectoral fins; long second dorsal fin (length of its base 40% SL); long pelvic fins reaching anus; incomplete trunk canal of seismosensory system with 25-27 pores, its end on vertical of last rays of anal fin; semicircular shape of genital papilla in males; all fins (including pelvic and anal) with dark spots. The new species differs from the closely related C. koshewnikowi in following features: abundance of melanophores on ventral side of body (vs. absence of melanophores); dermal papillae on upper and lateral parts of head (vs. absence of papillae and presence of dermal wrinkles); longer caudal peduncle (14.6±2.1 vs. 8.3±0.5% SL); large eye diameter (23.1±1.1 vs. 19.1±0.6% of head length); wider interorbital space (16.3±3.4 vs. 9.8±0.5% of head length). Cottus dorofeevi differs from another Eastern European species C. gratzianowi in following characters: branched rays in pectoral fin absent (vs. frequent presence in C. gratzianowi); gap absent and three pores in occipital commissure of lateral line system present (vs. presence of gap and four pores in C. gratzianowi); poorly developed lower lobes of mouth (vs. massive lobes in C. gratzianowi) (Ref. 132919). Sideleva, V.G. and Z.V. Zhidkov 2024 Description of a new species of <i>Cottus</i> Linnaeus (Cottidae) from the Western Dvina / Daugava River system, Baltic Sea basin, based on integrative taxonomy. Zootaxa 5447(4):473-495. (Ref. 132919) FB-Morphology-70993 http://purl.org/dc/dcmitype/Text text/html Trisha Marie Santos 2025-03-21 00:00:00 2025-06-04 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70993 Vertebrae: 31 - 34 Sideleva, V.G. and Z.V. Zhidkov 2024 Description of a new species of <i>Cottus</i> Linnaeus (Cottidae) from the Western Dvina / Daugava River system, Baltic Sea basin, based on integrative taxonomy. Zootaxa 5447(4):473-495. (Ref. 132919) FB-Distribution-70993 http://purl.org/dc/dcmitype/Text text/html Trisha Marie Santos 2025-03-21 00:00:00 2025-03-21 00:00:00 http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70993 Europe: Belarus. Sideleva, V.G. and Z.V. Zhidkov 2024 Description of a new species of <i>Cottus</i> Linnaeus (Cottidae) from the Western Dvina / Daugava River system, Baltic Sea basin, based on integrative taxonomy. Zootaxa 5447(4):473-495. (Ref. 132919) FB-Uses-70993 http://purl.org/dc/dcmitype/Text text/html Trisha Marie Santos 2025-03-21 00:00:00 2025-03-21 00:00:00 Importance http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70993 fisheries: of no interest FB-Size-70993 http://purl.org/dc/dcmitype/Text text/html Trisha Marie Santos 2025-03-21 00:00:00 2025-03-21 00:00:00 Max. size http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70993 7.4 cm SL (male/unsexed; (Ref. 132919)) Sideleva, V.G. and Z.V. Zhidkov 2024 Description of a new species of <i>Cottus</i> Linnaeus (Cottidae) from the Western Dvina / Daugava River system, Baltic Sea basin, based on integrative taxonomy. Zootaxa 5447(4):473-495. (Ref. 132919) 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-70993 http://purl.org/dc/dcmitype/Text text/html Trisha Marie Santos 2025-03-21 00:00:00 2025-03-21 00:00:00 Environment http://creativecommons.org/licenses/by-nc/3.0/ http://www.fishbase.org/summary/SpeciesSummary.php?id=70993 demersal; freshwater