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Taxonomical Notes on Selected Freshwater Fish Species Described

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Taxonomical Notes on Selected Freshwater Fish Species Described Zoological Research 35 (2): 142−159 DOI:10.11813/j.issn.0254-5853.2014.2.142 Taxonomical notes on selected freshwater fish species described from northern and central Vietnam (Cypriniformes: Balitoridae, Cobitidae, Cyprinidae, Nemacheilidae; Perciformes: Channidae, Osphronemidae; Synbranchiformes: Mastacembelidae) Marco Endruweit* Qingshan Road 601, Qingdao, China Abstract: Selected, little known taxa of northern and central Vietnamese freshwater fish species are reviewed. Nomenclatural acts are taken: Hemibarbus lehoai is placed in synonymy of H. maculatus, Paracobitis hagiangensis in synonymy of Schistura caudofurca. A neotype of Micronemacheilus bacmeensis is assigned. The name Channa hanamensis is treated as a nomen nudum. Two labeonine species described from China are nomenclaturally affected: Garra findolabium is transferred to Vinagarra and its specific epithet is treated as a noun in apposition; the specific epithet of Sinigarra napoense is corrected to napoensis. Keywords: New species; Ichthyology; Taxonomy; Nomenclature; Vietnam The ichthyofauna of Vietnam can be well separated (2005a, 2005b) in chronological order.1Mai (1978) and into a northern and a southern biome. Geographically, Kottelat (2001b) are comparable, since they exclusively these biomes are split by central Vietnam's massive Ann- deal with northern Vietnamese freshwater and estuarine amite Range. The northern biome shares many species fishes, while Nguyen & Ngo (2001) and Nguyen (2005a, with South China, while the southern biome resembles b) cover the ichthyofauna of entire Vietnam. Mai (1978) species assemblages of the Indian-Malayan subcontinent. and Kottelat (2001b) give 201 and 268 species, The Annamite Range itself features a high endemism rate respectively, including some species that were of highly specialized species in short and steep torrential undescribed at that time. Nguyen & Doan (2008) state streams running eastwards into the Gulf of Tonkin. that the ichthyofauna of northern Vietnam has two Northern Vietnam hydrographically encompasses origins: species that have spread from Yunnan and reaches of the Red, Pearl, Mekong, Ma, and Lam River Guangxi Province, China, into Vietnam and a local origin. basins, and many short coastal streams. The region is They provide numbers of fish species per subbasin of the undoubtedly dominated by the Red River basin, which Red River: 64 species and two subspecies for the Black stretches from highlands in the Northwest through River, the largest tributary of the Red River; 50 species lowlands to the extensive delta at sea level in the East. and one subspecies for the Thao River (Red River stretch The ichthyofauna of these water systems has been from Chinese border downstream to Viet Tri); 52 species extensively reviewed during the past. There are basically and two subspecies for the Lo River, the second largest three primordial works about the freshwater fish fauna of Red River tributary; and 29 species in the lower basin of northern Vietnam. All of them have significantly the Red River. The authors emphasize a higher influenced the taxonomy of fishes in the given region. These are the monographs of Mai (1978), Kottelat Received: 10 September 2013; Accepted: 10 November 2013 (2001b) and Nguyen & Ngo (2001) respectively Nguyen * Corresponding author, E-mail: [email protected] Science Press Volume 35 Issue 2 Taxonomical notes on selected freshwater fish species described from northern and central Vietnam 143 biodiversity in mountainous regions than in lowland DVZUT, and HNUE. Access to the specimens was water bodies. gained for examination under the care of the respective In order to taxonomically and nomenclaturally collection manager. review freshwater fish taxa which were recently described by Vietnamese ichthyologists from northern RESULTS AND REMARKS and central Vietnam, main repository ichthyologic Major repository ichthyologic collections in north- collections in Hanoi were visited. Taxa listed herein ern Vietnam are RIA 1 in Bac Ninh, DVZUT, and HNUE, may have nomenclatural relevance to the ichthyology in Hanoi. Traditionally, specimens stored in northern of adjacent countries. Vietnamese collections nearly comprehensively originate from the lower branches of the Red River basin including MATERIALS AND METHODS specimens from its largest tributary-the Black River. A Abbreviations used herein are: A=anal fin; C= minor quantity of specimens hails from the Mekong, and caudal fin; D=dorsal fin; P=pectoral fin; V=pelvic fin; the Pearl, Ma, and Lam Rivers. Fish species inhabiting AMNH=American Museum of Natural History, New water sheds located southern of the Lam River are shared York; DVZUT=Department of Vertebrate Zoology of the between the collections of RIA 1, DVZUT, HNUE, and Vietnam National University, Hanoi (obsolete name: the collection of RIA 2 in Ho Chi Minh City. In RIA 2, University of Tong-Hop; abbreviation commonly used there are chiefly stored specimens, which were obtained for the fish collection; further synonyms of DVZUT are from southern Vietnam, encompassing the entire Mekong VNUH, CRES, and NUH, all of them are in use); delta. The third Research Institute for Aquaculture (RIA HNUE=Hanoi National University of Education, Hanoi 3) in Nha Trang in south central Khanh Hoa Province is (University Su Pham [from the Vietnamese Truong Dai mainly engaged in fisheries and mariculture and is lack hoc Su pham], Hanoi; Department Zoology, Faculty of a freshwater fish collection. Pedagogy, National University, Hanoi); ICZN=Intern- The ichthyologic collections of RIA 1, DVZUT and ational Commission on Zoological Nomenclature; IEBR= HNUE were visited during beginning of April 2012. The Institute of Ecology and Biological Resources, Hanoi; largest collection is the one affiliated to the Research KIZ=Kunming Institute of Zoology, Kunming; lls=lateral Institute for Aquaculture No. 1 in Bac Ninh, Hanoi. line scales; LHL=Lateral head length; pds=predorsal Unfortunately, it is widely uncatalogued with untagged scales; RIA 1=Research Institute for Aquaculture No. 1, specimens. It incorporates species described by Nguyen Bac Ninh, Hanoi (NCNTTS I is a synonym); RIA 2= Van Hao (2005a, b). Catalogue (RIAH) numbers of Research Institute for Aquaculture No. 2, Ho Chi Minh lectotypes and neotypes assigned by Roberts & Catania City; RIAH=a number code system used by Roberts & (2008) were not maintained. It was impossible to trace Catania (2008) for cataloguing lectotypes and neotypes back specimens using those numbers within the stored in RIA 1, RIAH codes not maintained by RIA 1 collection. The collection of DVZUT is catalogued, but staff. specimens are widely untagged. It does not possess type If in the text is referred to 'the code', the intern- material of recently described taxa. The majority of ational code of zoological nomenclature of the fourth species described by Mai (1978) are stored in DVZUT. edition of ICZN is meant. This edition gained effective The small but tidy collection of HNUE keeps species from 2012-01-01. Diagraphs and diacritics of the Viet- described by Nguyen Huu Duc (e. g. Nguyen, 1997; namese alphabet are converted into the 26 letters of the Nguyen et al, 2009). ISO basic Latin alphabet. Counts, measurements, and Some of the taxa evaluated in Vietnamese collec- terminology of morphological features follow Kottelat & tions had a single type specimen, a holotype designation, Freyhof (2007), with the exception that lateral line scales while others were originally described on a base of equi- are counted in total including those pored located on the table type series specimens, usually referred to as synty- caudal fin. Measurements were taken with a dial caliper pes. Attempts were made to identify the holotype and to the nearest 0.1 mm. Counts and measurements were type specimens that are referred to in the original taken from the left side of a specimen whenever possible. description by comparing available specimens with the Examinations were non-invasively. Examined specimens specimen displayed in the original description, and by were stored in the repository collections of RIA 1, reconciling SL and TL with the text in the original descr- Kunming Institute of Zoology (CAS), China Zoological Society Volume 35 Issue 2 144 Endruweit iption. In cases where the holotype was existent and ations performed in the collections were holotype biased, could be unambiguously identified, it was examined, me- but generally focused on the best preserved type specimen. asured and photographed, provided that it was in a signi- An overview of the nomenclatural acts taken in this ficant better state than accompanying paratypes. Examin- contribution is described in Table 1. Table 1 Overview of the nomenclatural acts taken in this contribution Original combination Previous taxonomic status; references Taxonomic status herein Hemibarbus lehoai Nguyen, 2001; replacement name Hemibarbus lehoai Nguyen, 2001 Hemibarbus maculatus Bleeker, 1871 for Hemibarbus longianalis Nguyen & Doan, 1969 Garra findolabium Li et al, 2008: Zhang & Zhou, Garra findolabium Li et al, 2008 Vinagarra findolabium (Li et al, 2008) 2012 Sinigarra napoense Zhang & Zhou, 2012 Sinigarra napoense Zhang & Zhou, 2012 Sinigarra napoensis Zhang & Zhou, 2012 Traccatichthys taeniatus (Pellegrin & Chevey, 1936): Micronemacheilus bacmeensis Nguyen & Vo, 2005 Traccatichthys bacmeensis (Nguyen & Vo, 2005) Kottelat, 2012 (species inquirenda) Schistura hagiangensis Nguyen, 2005: Kottelat, 2012 Paracobitis hagiangensis Nguyen, 2005 Schistura caudofurca
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