A new species of trout from the Koepruecay River, a drainage of Mediterranean Sea, Tuerkiye (Salmoniformes, Salmonidae) Author Kuecuek, Fahrettin Department of Basic Sciences, Faculty of Egirdir Fisheries, Isparta University of Applied Sciences, Isparta, Turkiye Author Kalayci, Goekhan https://orcid.org/0000-0003-1255-496X Department of Basic Sciences, Faculty of Fisheries, Recep Tayyip Erdogan University, Rize, Turkiye Author Gueclue, Salim Serkan https://orcid.org/0000-0002-9256-449X Department of Basic Sciences, Faculty of Egirdir Fisheries, Isparta University of Applied Sciences, Isparta, Turkiye Author Oral, Muenevver https://orcid.org/0000-0001-7318-6641 Department of Basic Sciences, Faculty of Fisheries, Recep Tayyip Erdogan University, Rize, Turkiye Author Turan, Davut https://orcid.org/0000-0002-9586-6223 Department of Basic Sciences, Faculty of Fisheries, Recep Tayyip Erdogan University, Rize, Turkiye dvtturan@yahoo.com text Zoosystematics and Evolution 2024 2024-04-04 100 2 391 403 http://dx.doi.org/10.3897/zse.100.121174 journal article http://dx.doi.org/10.3897/zse.100.121174 1860-0743-2-391 54F22169B8C94AE987E8DD5E16A9BD0E CA23F99161E65EB38BAAF59398474FE0 Salmo ekmekciae sp.nov Type material. Holotype . IFC ESUF 02-0029, holotype, 216 mm SL, male; Tuerkiye : Isparta prov.: Yayla Stream, a drainage of Koepruecay River, 37.8115°N , 31.0925°E . Paratypes . IFC-ESUF 02-0022, 6, 70-150 mm SL; same data as holotype; FFR 3058, 4, 141-185 mm SL; Tuerkiye : Isparta prov.: Kartoz Stream ( Koepruecay River drainage), 37.7162°N , 31.1616°E . Diagnosis. Salmo ekmekciae is distinguished from all the species of Salmo in Tuerkiye and adjacent areas by combination of follow characters: one small black spot in postorbital and suborbital areas, greater than pupil; seven to seventeen black spots on opercle; black spots on body few or numerous, scattered on the back (missing in the predorsal area), a middle portion of flank, sometimes upper and lower halves of the flank. Red spots few, ocellated, organized in two or three irregular longitudinal rows on median part of the body, and half of lower part of the flank; commonly no black spots on flank in specimens larger than 160 mm SL, if red spots present in specimens larger than about 160 mm SL, they are almost covered with black dots; maxilla short and narrow; lateral line with 108-118 scales; 21-25 scale rows between dorsal-fin origin and lateral line; 16-18 scale rows between anal-fin origin and lateral line; 11-13 scale rows between origin of the adipose fin and lateral line. 22-24 gill rakers on outer side of first gill arch. Description. The general appearance is shown in Figs 2 - 4 , morphometric data are in Table 2 . Body moderately deep, compressed laterally, its maximum depth markedly smaller than head length. Dorsal profile slightly convex and ventral profile less convex than the dorsal profile. Head somewhat long, upper profile slightly convex in interorbital area, markedly convex in interorbital and on snout. Mouth small, slightly sub-terminal in males, sub-inferior in females. Tip of lower jaw slightly curved upwards, slightly pointed, with a slightly developed process at symphysis in males larger than 180 mm SL. Maxilla short, not reaching beyond posterior margin of the eye in males and females. Snout short, slightly rounded in males, rounded in females. Adipose fin somewhat large, its height 7-9% SL in males and about 7% SL in females, slightly increasing with body size. Largest observed specimen 185 mm SL. Figure 2. Salmo ekmekciae , IFC ESUF 02-0029, holotype, 216 mm SL, male; Tuerkiye : Koepruecay River. Figure 3. Salmo ekmekciae , IFC-ESUF 02-0022, paratype, 150 mm SL, female; Tuerkiye : Koepruecay River. Figure 4. Salmo ekmekciae , IFC-ESUF 02-0022, paratype, 84 mm SL, juvenile; Tuerkiye : Koepruecay River. Table 2. Morphometry of Salmo ekmekciae (holotype, IFC-ESUF 02-0029; paratypes FFR 3058, IFC-ESUF 02-0022, n=9. The calculations include the holotype.

-	Holotype	Paratypes
Sex	male	male	female
Number of specimens	-	n = 5	n = 5
Standard length (mm)	216	101-185	84-150
In percentage of standard length	-	Range (mean)	Range (mean)
Head length	25.9	27.5-30.4 (28.7)	27.1-28.0 (27.4)
Predorsal length	45.2	44.9-50.0 (47.2)	45.4-47.0 (46.3)
Prepelvic length	55.5	53.4-57.3 (55.4)	52.6-54.3 (53.4)
Preanal length	75.6	74.3-75.8 (75.2)	73.2-74.8 (73.4)
Body depth at dorsal-fin origin	20.9	24.1-27.5 (25.8)	22.3-23.5 (23.0)
Body depth at dipose-fin origin	14.1	13.1-14.4 (13.9)	12.7-13.0 (12.9)
Depth of caudal peduncle	10.2	9.2-10.2 (9.9)	9.6-10.1 (9.8)
Length of caudal peduncle	15.0	14.6-18.0 (16.1)	14.4-15.3 (15.0)
Distance between adipose- and caudal-fins	13.9	14.0-15.3 (14.6)	13.1-14.5 (14.0)
Body width at anal-fin origin	9.7	8.7-11.0 (10.2)	9.1-9.3 (9.2)
Length of dorsal-fin base	15.7	14.8-19.9 (17.3)	14.6-15.4 (15.0)
Depth of dorsal-fin	15.6	14.9-19.8 (18.4)	17.0-17.7 (17.3)
Length of pectoral-fin	18.3	17.3-22.3 (19.8)	18.3-20.9 (19.7)
Length of adipose-fin base	3.8	3.8-4.9 (4.4)	3.8-3.9 (3.9)
Depth of adipose-fin	7.1	7.0-8.7 (7.8)	6.6-7.5 (7.0)
Length of pelvic-fin	13.3	13.1-15.6 (14.8)	13.6-14.8 (14.2)
Depth of anal-fin	15.7	14.3-18.3 (15.7)	14.2-16.8 (15.3)
Length of anal-fin base	12.1	9.9-12.9 (11.5)	10.6-11.6 (11.2)
Length of upper caudal-fin lobe	13.4	15.8-20.0 (17.1)	14.3-15.9 (15.4)
Length of median caudal-fin rays	12.2	12.9-15.6 (14.1)	12.8-13.8 (13.3)
Length of lower caudal-fin lobe	14.6	15.9-20.3 (17.8)	16.3-17.5 (16.9)
Snout length	7.5	6.7-7.2 (7.0)	6.6-7.6 (7.0)
Distance between nasal openings	4.1	3.7-4.9 (4.4)	4.1-4.6 (4.3)
Eye diameter	4.8	5.6-7.3 (6.2)	5.4-6.3 (5.9)
Interorbital width	7.1	7.0-7.5 (7.3)	7.0-7.3 (7.2)
Head depth through eye	12.8	12.8-14.7 (13.9)	12.3-13.0 (12.7)
Head depth at nape	16.8	17.3-20.4 (18.9)	16.5-17.6 (17.0)
Length of maxilla	8.1	7.8-10.1 (8.8)	7.8-8.3 (8.1)
Maximum height of maxilla	2.5	3.0-3.8 (3.4)	3.1-3.5 (3.3)
Width of mouth gape	9.3	8.5-10.4 (9.6)	8.5-9.3 (8.9)
Length of mouth gape	11.2	11.8-13.1 (12.4)	11.3-12.2 (11.6)

Lateral line with 108-118 scales; 21-25 scale rows between dorsal-fin origin and lateral line; 16-18 scale rows between anal-fin origin and lateral line; 11-13 scale rows between origin of the adipose fin and lateral line. Dorsal fin with 9-10 branched and 3-4 unbranched rays, its distal margin straight or slightly convex. Pectoral fin with 1 unbranched and 11-13 branched rays, its external margin convex. Pelvic fin with 1 unbranched and 8 branched rays, its external margin slightly convex. Anal fin with 3 unbranched and 8 branched rays, its distal margin straight or slightly convex anteriorly and slightly concave posteriorly. Caudal fin slightly forked, lobes slightly pointed. 22-24 gill rakers on the outer side of first gill arch. Coloration. In formalin: General coloration of freshly preserved specimens silvery on back and flank, yellowish on the belly. Four broad dark bands on flank, without or very faintly marked in specimens smaller than approximately 160 mm SL. One small black spot in postorbital and suborbital areas, greater than pupil; seven to seventeen black spots on opercle, smaller than pupil. Black spots on body few or numerous (more than 70 in most specimens larger than about 160 mm SL), smaller than pupil, ocellated, scattered on the back (missing in the predorsal area), a middle portion of flank, sometimes over upper and lower halves of the flank. No black spot on top of the head. Red spots few (less than about 20), ocellated, organized in two or three irregular longitudinal rows on median part of the body, and half of lower part of the flank. Commonly no red spots on flank in specimens larger than 160 mm SL, if red spots present in specimens larger than about 160 mm SL, they are almost covered with black dots; dorsal fin grey, with three or five rows of black spots (smaller than pupil), and one or two rows of red spots (smaller than pupil) in specimens smaller than about 120 mm SL. Caudal fin grey or dark grey; pectoral, anal and pelvic fins grayish. Adipose-fin plain greyish. Nine or ten mostly vertically elongated parr marks on the body, distinct in specimens up to at least about 160 mm SL. In life: General body colour silvery. Back and halves of upper part of flank silver, belly and halves of lower part of flank yellowish. All fins yellowish. A conspicuously black spots behind eye, smaller than pupil. Red spots few and with almost covered black pigment in specimens larger than about 160 mm SL, scattered on median part of the body, and half of lower part of the flank. Adipose-fin plain greyish, with very inconspicuous reddish margin. Nine or ten vertically elongated dark grey parr marks along middle part of flank. Distribution. Salmo ekmekciae inhabits clear and moderately swift-flowing water, with a substrate of stones and pebbles. It is only known from the Koepruecay River and its tributaries in Antalya-Isparta province (Fig. 5 ). Figure 5. Type localties of Salmo species in the Tuerkiye . Sexual dimorphism. The snout of the male is more pointed than that of the female. The length of the head, and the length of the maxilla of the male are slightly greater than those of the female counterparts. Etymology. The species is named for Dr. Fitnat Gueler Ekmekci ( Tuerkiye ), ichthyologist, in appreciation of her contribution to literature. Conservation status. Salmo ekmekciae is only known from Koepruecay River, most probably endemic to that area. The species is threatened by overfishing similar to other Salmonids and there are rainbow trout ( Oncorhynchus mykiss ) farms in the region.