Pseudophoxinus burduricus, Kuecuek, Fahrettin, Guelle, Iskender, Gueclue, S. Serkan, Ciftci, Yilmaz & Erdogan, Oemer, 2013

Kuecuek, Fahrettin, Guelle, Iskender, Gueclue, S. Serkan, Ciftci, Yilmaz & Erdogan, Oemer, 2013, A new Pseudophoxinus (Teleostei, Cyprinidae) species from Southwestern Anatolia, with remarks on the distribution of the genus in western Anatolia, ZooKeys 320, pp. 29-41 : 31-35

Pseudophoxinus burduricus sp. n. Figures 2, 3

Holotype.

IFC-ESUF 0427, female, 62.80 mm SL; Turkey, Burdur Prov., Değirmendere Creek, Karamanlı, Lake Burdur drainage; 37°24'18"N, 29°49'06"E, 07 November 2009, coll. F. Küçük, İ. Gülle and Ö. Erdoğan.

Paratypes.

IFC-ESUF 0428, 17 (11 males, 6 females), 39.90-86.69 mm SL; same as holotype.

Additional material.

IFC-ESUF 0236, 7, 45.31-54.40 mm SL; Burdur Prov., Salda Stream near Lake Salda; F. Küçük, M.A. Atalay, 13 June 1998. -IFC-ESUF 0289, 3, 31.98-71.56 mm SL, Burdur Prov., Düğer Spring; F. Küçük, A. Altun, M. Telli, 05 August 2006. -IFC-ESUF 0429, 5, 51.34-80.08 mm SL, Burdur Prov., Sazak Spring near Lake Yarışlı; F. Küçük, İ. Gülle, S.S. Güçlü, 13 July 2009. -IFC-ESUF 0430, 6, 41.91-55.95 mm SL, Burdur Prov., Salda Stream near Lake Salda; F. Küçük, İ. Gülle, S.S. Güçlü, 13 December 2009. -IFC-ESUF 0449, 8, 46.10-60.43 mm SL, Burdur Prov.; Salda Stream near Lake Salda; F. Küçük, İ. Gülle, 16 April 2010. -IFC-ESUF 0475, 7, 46.10-60.43 mm SL, Burdur Prov.; Dereköy Stream; F. Küçük, İ. Gülle, S.S. Güçlü. 18 May 2012.

Diagnosis.

Pseudophoxinus burduricus is distinguished from all other species of Anatolian Pseudophoxinus by the following unique combination of characters: head short, its length equal or slightly greater than body depth at dorsal fin origin; mouth slightly subterminal, the tip of the mouth cleft on approximately level of with lower margin of eye; snout rounded, its length greater than eye diameter; a faint and diffuse epidermal black stripe from eye to caudal fin base in alive and preserved individuals; pared fins and caudal peduncle distinctly sexual dimorphic (male with longer pelvic and pectoral fins and slenderer caudal peduncle); lateral line incomplete, with 21-37 (commonly 26-37) perforated scales and 47-57+1-2 scales in lateral series (commonly 50-55); 10½–12½ scale rows between lateral line and dorsal fin origin; 3-4 rarely 5 scale rows between lateral line and the pelvic fin origin; 7-8 (9) gill rakers on the first branchial arch; pharyngeal teeth 5-4 or 5-5, slightly serrated and hooked at tip; dorsal fin commonly with 7 (8) ½ branched rays; anal fin with 6 (7) ½ branched rays.

Description.

See Figs 2-3 for general appearance and Tables 1-2 for morphometric and meristic data.

A Moderately deep-bodied, elongate and wide headed species. Dorsal profile of body slightly convex in predorsal area, ventral profile more convex than dorsal profile. Predorsal distance 52-57% SL, mean 55.0 and preanal distance 69-74% SL, mean 72.0. Head short, its length 26-28% SL, mean 26.8, approximately 1.0-1.1 times body depth at dorsal-fin origin, and its dorsal profile slightly convex on snout. Head depth at interorbital region 2.1-2.7 times eye diameter and 1.3-1.6 times interorbital distance. Mouth slightly subterminal, posterior extremity of upper jaw slightly in front of anterior margin of eye. Snout rounded, its length 27-33% HL, mean 29.6, greater than eye diameter. Caudal peduncle slightly deep, its depth 1.4-1.9, mean 1.6 times in its length.

Lateral line incomplete, usually reaching above anal fin origin, 32 perforated scales in the holotype (26-37 in paratypes), 47-57+1-2 scales in lateral series. Dorsal fin with 3 simple and 7½ (n=18, in one specimen 8½) branched rays, outer margin slightly convex. Anal fin with 3 simple and 6 (15) ½ or 7 (3) ½ branched rays, outer margin slightly convex. Pectoral fin with 13-14 branched rays, outer margin straight or slightly convex. Pelvic-fin with 7 branched rays. Caudal fin forked, lobes rounded. There is no pelvic axillary lobe and keel between posterior pelvic fin base and anus. Pharyngeal teeth 5-4 or 5-5, slightly serrated, hooked at tip (developed on the left side). Gill rakers short and thick, with 7-8 (9) in outer side of first gill arch. Preoperculo-mandibular (CPM) and infraorbital (CIO) sensory canals disconnected, CSO with 10-12 pores, CIO with 14-19 pores, CPM with 14-18 pores, total vertebrae 36-39, 21-22 abdominal and 15-17 caudal vertebrae, vertebral formulae: 36 –39:21–22+15– 17.

Sexual dimorphism. In Değirmendere population, there is no tubercules on snout and head in males, which have longer pelvic and pectoral fins and slender caudal peduncles than females. In Lake Salda population, on the other hand, tubercules present in males on entire body (concentrated on operculum) and all fins except for the caudal fin.

Coloration. Body silvery, dorsal light brown or olive green and scales irregular with small epidermal spots in specimenslarger than50 mm SL. There is a faint epidermal black or violet (in Sazak population) stripe along lateral midline from eye to caudal fin base in alive. The dark stripe indistinct or slightly distinct in anterior part of body but distinct in posterior part of body in preserved specimens. Lateral line scales with small brown to black spots above and below pores in some individuals. Fin membranes whitish or light grey, rays with black-spotted. In individuals smaller than 50 mm SL: body silvery, dorsal dusty grey, ventral pearl grey.

Distribution.

Pseudophoxinus burduricus is known only from the lakes and their sources in Lake Burdur Endorheic Basin: Değirmendere Creek, Lake Karataş, Düğer and Sazak (or Kümbet) springs, Dereköy Stream, Lake Salda and Salda Stream (Fig. 1). Değirmendere Creek is a 5 km long creek flowing into the Karamanlı reservoir, which is connected with artificial reservoir Lake Karataş. Düğer spring is a source of Lake Burdur, while Sazak Spring is a source of Lake Yarışlı. Dereköy Stream is an approximately 5 km long rivulet formerly draining into Çorak (or Akgöl) Lake which, due to a small reservoir constructed in 1970, no more can reach the lake. The new species can be encountered in the shallow parts of the reservoir and the small stream flowing into it.

Other species present were: Chondrostoma fahirae (Ladiges, 1960), Oxynoemacheilus anatolicus Erk’akan, Özeren & Nalbant, 2008 and Oncorhynchus mykiss (Walbaum, 1792) (an escape from fish farms in Karamanlı reservoir)in Değirmendere, in Düğer Spring only Oxynoemacheilus anatolicus and in Salda Stream only Aphanius splendens (Kosswig & Sözer 1945).

Etymology.

The species is named after the Burdur Province where the type locality is located.