Cobitis dorademiri, Erkakan, Ozdemir & Ozeren, 2017

Freyhof, Jörg, Bayçelebi, Esra & Geiger, Matthias, 2018, Review of the genus Cobitis in the Middle East, with the description of eight new species (Teleostei: Cobitidae), Zootaxa 4535 (1), pp. 1-75 : 15

Cobitis dorademiri Erk'akan, Özdemir & Özeren, 2017

(Fig. 8)

Cobitis dorademiri Erkakan, Özdemir & Özeren, 2017: 83 , fig. 1 (type locality: Turkey: Muğla prov.: Lake Köyceğiz basin, stream Balıklı).

Material examined. FSJF 2347 , 16 , 37–64 mm SL; Turkey: Muğla prov.: River Dalaman about 5 km north of Dalaman , 36.814 28.798 .— FSJF 2410 , 8 , 54–87 mm SL; Turkey: Muğla prov.: stream Balıklı at road from Muğla to Köyceğiz southeast of Karaböğürtlen , 37.008 28.546 .

Material used in molecular genetic analysis. FSJF DNA-333; Turkey: Muğla prov.: River Dalaman about 5 km north of Dalaman, 36.814 28.798. (Accession numbers: KJ552809 , KJ552800 , BOLD EUFWF2752 to EUFWF2755).

Diagnosis. Cobitis dorademiri is distinguished from other Cobitis species in the eastern Aegean Sea basins by having two laminae circularis in the male (vs. one in C. fahireae ).

Cobitis dorademiri is distinguished from C. battalgilae by having a deeper caudal peduncle (caudal-peduncle depth 1.0–1.2 times in caudal-peduncle length vs. 0.6–0.7) and by usually having a very regular colour pattern organised in the four Gambetta zones (vs. usually disorganised).

Distribution. Judging from our current knowledge, Cobitis dorademiri is endemic to the Lake Köyceğiz basin and the lower Dalaman River drainage.

Remarks. See below for details to distinguish C. dorademiri from other species of the C. simplicispina species group. Cobitis phrygica and C. dorademiri have two laminae circularis and both are found in the Dalaman River drainage. These two species seem not to occur in sympatry as C. dorademiri is only known from the lower and C. phrygica from the upper Dalaman River drainage, where it occurs adjacent to and potentially sympatric with C. fahireae . More fieldwork needs to be conducted to explore the distribution areas of the three Cobitis species in the Dalaman River drainage to better understand their distribution.

Molecular data shown in Fig. 1 and by Geiger et al. (2014) place C. dorademiri in the C. simplicispina species group ( C. battalgilae , C. bilseli , C. joergbohleni , C. phrygica , C. pirii , C. simplicispina , C. sipahilerae , C. turcica ). Based on DNA barcoding Cobitis dorademiri is well separated from all other included Cobitis and by a minimum K2P distance of 3.5% to C. phrygica , also supported as PTP and mPTP entity.

FİGURE 8. Cobitis dorademiri , FSJF 2410, male, 87 mm SL; Turkey: stream Balıklı.

Figures

FIGURE 1. Maximum likelihood estimation of the phylogenetic relationships based on the mitochondrial COI barcode region (TN93 model, discrete Gamma distribution for rate differences with 3 categories +G parameter = 0.3792. Nucleotide positions with less than 95% site coverage were eliminated, resulting in 590 analysed positions. Numbers of major nodes indicate bootstrap values from 1000 pseudoreplicates from the ML, NJ and MP method. A star denotes highest possible support from all three methods. Solid bars right to the specimen labels indicate species delimitation results from PTP followed by the results of the mPTP approach as dashed bars. Except to the outgroups and the branch to the right part of the figure, the tree is drawn to scale with branch lengths depicting number of substitutions per site.