Pseudophoxinus mehmeti, Ekmekçi, F. Güler, Atalay, M. Altuğ, Yoğurtçuoğlu, Baran, Turan, Davut & Küçük, Fahrettin, 2015

Ekmekçi, F. Güler, Atalay, M. Altuğ, Yoğurtçuoğlu, Baran, Turan, Davut & Küçük, Fahrettin, 2015, A new species of Pseudophoxinus (Teleostei: Cyprinidae) from Southwestern Anatolia, Turkey, Zootaxa 4033 (1), pp. 117-128 : 119-123

Pseudophoxinus mehmeti , new species

( Figures 2–3 )

Holotype. FFR 0 3274, 63.0 mm SL; Turkey: Burdur Prov.: Yeşilova District: Alanköy reservoir, 54 km southwest from Burdur, 37o40'58''N 29o50'46''E; 20 October 2013, F. G. Ekmekçi, B. Yoğurtçuoğlu.

Paratypes. FFR 0 3275, 30, 51.9–70.7 mm SL, CGE, 26, 43.5–68.3 mm SL; same locality as holotype, 24 October 2013.

Diagnosis. Pseudophoxinus mehmeti is closely related to the P. meandri species group, but can be distinguished from all other Pseudophoxinus species ( P. burduricus , P. evliyae , P. maeandricus , P . maeandi, P. ninae and P. bataligilae ) in adjacent regions by the following unique combination of characters: body slender, its depth at dorsal-fin origin 19.1–23.4 % SL; head long (length 26.9–31.4 % SL), its length 1.3–1.5 times in body depth, slender, narrow; caudal-peduncle length 1.6–2.0 times its depth; mouth almost superior, without a chin; lower lip projecting slightly beyond upper lip in most specimens; tip of mouth cleft at approximately level of middle of pupil; snout pointed, its length equal or greater than eye diameter; lateral line not complete, with 30–50 perforated scales and 48–60+2 scales in lateral series; 11½–13½ scale rows between lateral line and dorsal-fin origin; 3–5½ scale rows between lateral line and anal-fin origin; a distinct black epidermal stripe from eye to caudal-fin base in preserved individuals, absent in living individuals; preoperculo-mandibular (CPM) and infraorbital (CIO) sensory canals disconnected, CSO with 9–13 pores, CIO with 15–18 pores, CPM with 16–19 pores, CST with 14–16 pores.

Description. See Figs. 2–3 for general appearance, and Tables 1–2 for morphometric and meristic data. Dorsal profile of body slightly convex in predorsal area, straight in postdorsal area, ventral profile less convex than dorsal profile. Head long, its length approximately 1.3–1.5 times body depth at dorsal-fin origin, its dorsal profile slightly convex on snout. Head slender, narrow. Interorbital area narrow, its width 1.1–1.5 times eye diameter. Caudal peduncle length 1.6–2.0 times its depth. Mouth slightly superior, without a chin ( Fig. 4 ). Posterior extremity of upper jaw slightly in front of anterior margin of eye. Snout short, with pointed tip, its length markedly greater than eye diameter.

Lateral line incomplete, reaching vertically to about mid-point of anal-fin base except in two specimens, ending 5 scales anterior to caudal-fin base, 30 (1), 31 (1), 32 (2), 33 (1), 34 (1), 36 (3), 37 (4), 38 (1), 40 (1), 41 (2), 42 (1), 43 (3), 44 (3), 45 (1), 46 (1), 47 (3), 49 (1), 50 (1) perforated scales, 50 (4), 51 (1), 52 (3), 53 (3), 54 (1), 55 (3), 56 (1), 57 (5), 58 (3), 59 (3), 60 (2), 61 (1), 62 (1) scales in lateral series. Dorsal fin with 3 simple and 6½–7½ branched rays, its posterior margin straight. Anal fin with 3 simple and 6½–7½ branched rays, its posterior margin slightly convex. Pectoral fin with 13–14 branched rays, posterior margin straight or slightly convex. Pelvic-fin with 6–7 branched rays. Caudal-fin forked, lobes pointed. Pharyngeal teeth 5–4 or 5–5, slightly serrated and hooked at tip; anterior edge of all teeth hooked, commonly first and second tooth on both sides slightly serrated. Size up to 83.9mm SL.

Supraorbital canal with 9–13 pores, complete, composed of three segments (on parietal and postparietal) but not interrupted, pores located on the short canals slightly branched from main canal. Infraorbital canal not connected with preoperculo-mandibular canal ( Figs. 5–6 ), infraorbital canals with 15 (3), 16 (2), 17 (4), 18 (6) pores, canal complete but scattered on postorbitals, preoperculo-mandibular canal with 16–19 pores, interrupted between angular-articular and preoperculum, with 5 (2), 6 (8), 7 (5) pores on lower jaw, 10 (1), 11 (4), 12 (10) pores on preoperculum, terminating over the upper margin of opercular process ( Figs. 5–6 ). Supratemporal canal commonly medially interrupted ( Fig. 6 a) but two sides of canal relatively close to each other, with total 14 (4), 15 (6), 16 (5) pores.

Sexual dimorphism. Pelvic and pectoral fins longer in males than in females, pelvic fins do not reach up to anus in females, but in males pelvics cover anus.

Coloration. In living individuals, body silvery white, back grey, a faint grey stripe running from posterior margin of operculum to caudal-fin base on body (more apparent and dark in preserved specimens), dorsal and caudal fins pale grey, pectoral, pelvic and anal fins yellowish-white. In formalin-preserved individuals, body dark brown/grey above stripe, yellowish white below it. A dark-brown inner axial stripe present, from behind head to caudal-fin base. Dorsal and caudal fins light grey; pectoral, pelvic and anal fins yellowish in living and formalinpreserved individuals.

TABLE 1. Morphometry of three Pseudophoxinus species from Burdur province.

P. mehmeti (n=30) P. burduricus (n =15) P. ninae (n=15) Locality Alanköy Reservoir Değirmendere Creek Onaç Stream, Distribution. Pseudophoxinus mehmeti was only found in the Alanköy basin ( Fig. 1 ). The Alanköy reservoir has a small catchment located within the Çorak (Akgöl) lake basin. This closed endorheic basin is hydrologically not connected to any other river drainage or lake basin and has not been in connection during the geological past, at least since the Pliocene, with the adjacent basins

SD 1.5 1 1.4 1.5 3.8 6.42 0.71 0.51 0.46 0.48 0.00 0.00 mean 16 14 10 17 55 19 12 5 7 6 14 6) 15

= n max 19 16 11 19 61 28 14 5 7 7 14 6 ( ninae

P. min 14 12 7 14 47 10 11 4 6 6 14 6 SD 0.91 1.30 0.94 1.16 4.21 4.48 1.01 0.41 0.00 0.00 0.55 0.00 Etymology. The species is named for Mehmet Ekmekçi who contributed to our studies in hydrological description and characterisation, and interpretations of drainage networks and watersheds, in addition to his full support as the husband of the first author.

Figures

FIGURE 1. Map showing drainages of basins and the localities of Pseudophoxinus species in Burdur province examined for this study 1, P. mehmeti; 2, P. burduricus; 3, P. ninae.

FIGURE 4. Lateral view of the head: a, Pseudophoxinus mehmeti, FFR 0 3275, Paratype, 60 mm SL, Alanköy Reservoir; b, P. burduricus IFC-ESUF 0 428, Paratype, 61 mm SL, Değirmendere Creek; c, P. ninae IUSHM 33900 - 928, Paratype, 70 mm SL. Onaç Stream; d, P. maeandri: IFC-ESUF 0 3.989, 51.48 mm, Işıklı Lake; e, P. maeandricus: IFC-ESUF 0 3.990, 86.40 mm SL, Karadirek Stream Sandıklı-Afyon.

FIGURE 5. Scheme of cephalic sensory canal pattern: a, Pseudophoxinus mehmeti, CGE, Paratype, 59.41 mm SL, Alanköy reservoir, b, P. burduricus IFC-ESUF 0 428, Paratype, 65.95 mm SL, Değirmendere Creek. (a, P. mehmeti and b, P. burduricus). (CIO-Infraorbital canal CPM, preoperculo-mandibular canal; CSO, supraorbital canal; CST, supratemporal canal).

FIGURE 6. Scheme of dorsal view of head and cephalic pores: a, Pseudophoxinus mehmeti, CGE, Paratype, 59.41 mm SL, Alanköy reservoir, b, P. burduricus IFC-ESUF 0 428, Paratype, 65.95 mm SL, Değirmendere Creek.

FIGURE 2. a, Pseudophoxinus mehmeti, FFR 0 3274, holotype, 63.0 mm SL; Turkey: Alanköy Reservoir; b, Pseudophoxinus mehmeti, not preserved, 51.9 mm SL Turkey: Alanköy Reservoir.

FIGURE 3. Pseudophoxinus mehmeti, FFR 0 3274, paratypes, lateral views, from top to bottom 62, 60, 59, 58, 55 mm SL, Turkey, Alanköy Reservoir.