Leuciscus kurui Bogutskaya, 1995

Freyhof, Jörg, Kaya, Cüneyt, Bayçelebi, Esra, Geiger, Matthias & Turan, Davut, 2018, Generic assignment of Leuciscus kurui Bogutskaya from the upper Tigris drainage, and a replacement name for Alburnus kurui Mangit & Yerli (Teleostei: Leuciscidae), Zootaxa 4410 (1), pp. 113-135: 115-121

publication ID

https://doi.org/10.11646/zootaxa.4410.1.6

publication LSID

lsid:zoobank.org:pub:A7372470-5727-4E4E-967D-02AD42CB93DF

persistent identifier

http://treatment.plazi.org/id/65538B44-FFF3-6218-FF12-F996FE86DAA5

treatment provided by

Plazi

scientific name

Leuciscus kurui Bogutskaya, 1995
status

 

Leuciscus kurui Bogutskaya, 1995   , a valid species in Alburnus  

Fig. 3–4 View FIGURE 3 View FIGURE 4

Material examined. FFR 04662 View Materials , 3, 44– 46 mm SL; FSJF 3675, 3, 49–69 mm SL; Turkey: Hakkari prov.: spring at margin of Yüksekova wetland about 2 km west of Yürekli , 37.435, 44.366 GoogleMaps   .— FFR 04660 View Materials , 2, 66– 74 mm SL; Turkey: Hakkari prov.: stream flowing to Yüksekova wetland about 500 m west of Yürekli, 37.431, 44.390.— ZMH 7361 View Materials , 83 View Materials mm SL, holotype; ZMH 8413 View Materials , 3 View Materials , 79–86 mm SL, paratypes; Turkey: Hakkari prov.: Yüksekova suyu in upper Tigris (Dicle Nehri) drainage east of Hakkari. M. Kuru, 17 Jun 1974 GoogleMaps   .

Material used in molecular genetic analysis. FSJF DNA-2668   , Turkey: Hakkari prov.: spring at margin of Yüksekova wetland about 2 km west of Yürekli , 37.435, 44.366 (GenBank accession number: MG 775332 View Materials MG 775336 View Materials ) GoogleMaps   .

Diagnosis. Alburnus kurui   is distinguished from A. timarensis   by having less gill rakers on the first gill arch (8–12 vs. 13–17). The ventral keel between the end of the pelvic-fin base and the anus is absent in A. kurui   and the mid-ventral line between the posterior part of the pelvic-fin base and the anus is completely covered by scales. In A. timarensis   the ventral keel is present and scaleless for 5–10 scales in front of the anus (scales are counted beside the keel). Interestingly, in living A. kurui   , there is an unpigmented line at the position where the ventral keel in other Alburnus   species is situated. In A. kurui   , the body is short and stout and the snout is rounded ( Fig. 3–4 View FIGURE 3 View FIGURE 4 ). In A. timarensis   , the body is slender and elongated ( Fig. 5 View FIGURE 5 ) and the snout is slightly pointed. In addition to the differences given above, A. kurui   has a wider and deeper head (head width at nape 15–17% SL vs. 12–14; head depth at nape 18–20% SL, vs. 16–18). Alburnus kurui   is distinguished from our materials of A. timarensis   examined by having less total scales in the lateral series (51–58). Alburnus kurui   is distinguished from A. sellal   , A. heckeli   and A. tarichi   by having less gill rakers on the first gill arch (8–12 vs. 10–17 in A. sellal   , 15–33 in A. heckeli   , 18–27 in A. tarichi   ), less total scales in the lateral series (51–58 vs. 66–89 in A. sellal   , 77–93 in A. heckeli   , 70–93 in A. tarichi   ) and the absence of a ventral keep (vs. presence).

Distribution and habitat. Alburnus kurui   is known only from the Yüksekova wetland in Turkey. The wetland is seasonally flooded, forming a large, shallow lake; in spring 2017, when the lake was dry, A. kurui   was found only in a stream and a spring flowing to the wetland. Yüksekova wetland, though as yet unprotected, is a prime conservation site; with Yüksekova city being at an elevation of 1950 m a.s.l., this is the highest wetland in Turkey ( Yilmaz & Demircioglu Yildiz 2005).

Remarks. In its habitat, the fish were resting in small flocks directly under the water surface, a behaviour known from many other Alburnus   species. Further, its general appearance let us speculate, immediately after we caught the fish, that it might be a member of the genus Alburnus   . It is close to A. timarensis   not only in its DNA barcode sequence but also in meristic characters ( Table 2 View TABLE 2 ). Therefore, we have no doubt that it is placed correctly in Alburnus   , although we were able only to study DNA barcode data and no additional molecular characters.

The DNA barcode data place A. kurui   in a cluster with specimens of A. timarensis   from the Lake Van basin. While we found morphometric ( Table 1 View TABLE 1 ) and meristic ( Table 2 View TABLE 2 ) characters differentiating A. kurui   from A. timarensis   , both species are very similar in having low scale counts and gill-raker numbers ( Table 2 View TABLE 2 ). We found no A. timarensis   with less than 64 total lateral line scales (64–75, n=20) and Elp et al. (2013) found no A. timarensis   with less than 57 total lateral line scales (57–68, n=25). Kuru (1980) reported 8, 3 and 2 individuals with 54, 55 and 56 scales respectively (54–68, n=102). Danulat & Selcuk (1992) gave a range of 55–92 total lateral line scales (n=20) for A. tarichi   and Ladiges (1960) and Berg (1949) reported for A. tarichi   53–94 and 65–82 total lateral line scales, respectively. Already Elp et al. (2013) suspect that their samples contained A. tarichi   as well as A. timarensis   . These studies let us speculate, that A. timarensis   regularly has more than 57 lateral line scales and scale counts rarely overlap with those of A. kurui   .

A. kurui   12 A. timarensis   153 A. sellal   74 8 7 4 6 4 3 2 2 2 2 2 A. selcuklui   20 3 3 1 1 1 A. heckeli   50 1 3 2 6 4 2 4 7 4 6 5 2 4 1 A. tarichi   148 15 8 24 12 9 13 6 5 2 4 2 1 2 1 A. caeruleus   30 continued. Scales above lateral line Scales below lateral line N 8 9 10 11 12 13 14 15 16 4 5 6 7 8

continued.

MG

Museum of Zoology