Accepted by L. Page: 30 Nov. 2015; published: 20 Jan. 2016 ZOOTAXA ISSN 1175-5326 (print edition) ISSN 1175-5334 (online edition) Copyright © 2016 Magnolia Press Zootaxa 4067 (1): 079–087 http://www.mapress.com/j/zt/ Article 79 http://doi.org/10.11646/zootaxa.4067.1.6 http://zoobank.org/urn:lsid:zoobank.org:pub:60AD714F-5192-475F-AA37-09BBAF6AB024 Alburnoides diclensis (Actinopterygii: Cyprinidae), a new species of cyprinid fish from the upper Tigris River, Turkey DAVUT TURAN 1 , YUSUF BEKTAŞ, CÜNEYT KAYA & ESRA BAYÇELEBİ Recep Tayyip Erdogan University, Faculty of Fisheries and Aquatic Sciences, 53100 Rize, Turkey. E-mail: dvtturan@yahoo.com; yusuf.bektastr@gmail.com; cnytkaya@yahoo.com; doganeesra@gmail.com 1 Corresponding author. E-mail: dvtturan@yahoo.com Abstract Alburnoides diclensis sp. n. is described from the Tigris River drainages (Persian Gulf basin) in southeastern Anatolia, Turkey. It is distinguished by a combination of the following characters (none unique to the species): a poorly developed ventral keel between pelvic and anal fins, completely scaled or rarely without one scale in front of anus; head short (length 24–27% SL), its upper profile markedly convex on level of nostril; mouth terminal, with marked chin; lips equal to or upper lip slightly longer than lower lip; snout with rounded tip, its length equal to or greater than eye diameter but smaller than interorbital distance; body moderately deep (depth at dorsal-fin origin 25–30% SL); anal-fin depth 1.2–1.4, mean 1.3 times in HL; 48–53 lateral-line scales, 12½–15½ branched anal-fin rays; 41–42 total vertebrae, comprising 20–21 abdom- inal and 20–21 caudal vertebrae. Key words: Anatolia, Cyprinidae, taxonomy, Alburnoides, new species Introduction Alburnoides bipunctatus has long been considered to be a species widely distributed in Europe and in north and west Asia including Turkey (Bogutskaya & Coad 2009). In Turkey, A. bipunctatus was reported to be present in the Marmara, Aegean and Black Sea basins, in the Kura river drainages, and in the Tigris and Euphrates rivers (Turan et al. 2013, 2014). For many years, a number of subspecies and local forms of Alburnoides bipunctatus have been reported; however, most taxonomists claimed that it belonged to single polymorphic species since they did not pay attention to this diversity (e.g. Berg 1949; Kuru 1975; Bogutskaya & Naseka 2004; Geldiay & Balık, 2007). In recent years, some taxonomists have discussed the taxonomic position of the subspecies of A. bipunctatus and reported some to be valid species: A. ohridanus Karaman 1928 (Lake Ohrid and Adriatic Sea basin), A. prespensis Karaman 1924 (Lake Prespa), A. rossicus Berg 1924 (Dnieper River, Black Sea basin and Volga River, Caspian Sea basin), A. kubanicus Berg 1932 (Kuban River, Sea of Azov basin), A. fasciatus Nordmann 1840 (rivers of the western Transcaucasia, Black Sea basin), A. eichwaldii De Filippi 1863 (Kura River, Caspian Sea basin), and A. tzanevi Chichkoff 1933 (Rezovska River, Black Sea basin) (Kottelat 1997; Coad & Bogutskaya 2009; Bogutskaya & Coad 2009; Turan et al. 2013). In addition to these species, 14 new species have been described within Alburnoides bipunctatus: A. devolli Bogutskaya, Zupančič & Naseka 2010 (Seman River system, Adriatic Sea basin), A. emineae Turan, Kaya, Ekmekçi & Doğan 2014 (Beyazsu Stream, Euphrates River drainage, Persian Gulf basin), A. fangfangae Bogutskaya, Zupančič & Naseka 2010 (Seman River system, Adriatic Sea basin), A. gmelini Bogutskaya & Coad 2009 (Sunzha River, Terek River drainage, Caspian Sea basin), A. holciki Coad & Bogutskaya 2012 (Hari River, endorheic, historically Aral Sea basin), A. idignensis Bogutskaya & Coad 2009 (Bid Sorkh River, Gav Masiab River system, Tigris River drainage, Persian Gulf basin), A. manyasensis Turan, Ekmekçi, Kaya & Güçlü 2013 (Koca Stream, Marmara Sea basin), A. namaki Bogutskaya & Coad 2009 (qanat at Taveh, Namak Lake basin), A. nicolausi Bogutskaya & Coad 2009 (Simareh River in Karkheh River system, Tigris River drainage, Persian Gulf