Squalius

Khaefi, Roozbehan, Esmaeili, Hamid Reza, Sayyadzadeh, Golnaz, Geiger, Matthias F. & Freyhof, Jörg, 2016, Squalius namak, a new chub from Lake Namak basin in Iran (Teleostei: Cyprinidae), Zootaxa 4169 (1), pp. 145-159 : 148

Key to the Squalius species in the Persian Gulf basin, the southern Caspian Sea basin and Kavir, Namak and Urmia basins

1a Lateral line with 45–50+1–3 scales; head pointed, slender; head depth 44–53% HL.......................... S. lepidus

1b Lateral line with 39–44+1–3 scales; head blunt, deep; head depth 50–63% HL.................................... 2

2a Knob on lower jaw symphysis wide, thick ( Fig. 9 ); posterior tip of each flank scale with a bold grey or brown, roundish or crescent-shaped blotch ( Figs. 3 , 5 ).................................................................. S. namak

2b Knob on lower jaw symphysis narrow, thin or absent ( Figs. 10 , 11 ); posterior tip of flank scales without bold blotch ( Fig. 5 )...................................................................................................... 3

3a Mouth subterminal, upper lip projecting beyond lower lip ( Fig. 7 ); caudal-, anal- and pelvic-fin rays hyaline or with a grey or yellow hue in life; knob on lower jaw symphysis absent ( Fig. 10 ).......................................... S. berak

3b Mouth terminal, tip of upper lip level with tip of lower lip ( Fig. 9 ); caudal-, anal- and pelvic-fin rays orange in life; knob on lower jaw symphysis small ( Fig. 11 )............................................................... S. turcicus

Figures

FIGURE 3. Squalius namak, paratypes, ZM-CBSU G 119, 113 mm SL, ZM-CBSU E 780, 96 mm SL; Iran: spring Bolagh.

FIGURE 5. Pattern of flank-scale pigmentation below dorsal fin: a, S. berak, ZM-CBSU J 1725, 143 mm SL; Iran: Little Zab River between Piranshahr and Sardasht; b, S. lepidus ZM-CBSU G 794, 145 mm SL; Iran: Seymareh River west of Charu Dareh; c, S. namak ZM-CBSU G 437, 145 mm SL; Iran: Bolagh Spring at Shazand; d, S. turcicus IUSHM 1059, 148 mm SL; Turkey: stream between Sarikamis and Handere, about 4 km south of Sarikmis.

FIGURE 7. Shape of head in Squalius berak. a, ZM-CBSU G 1723, 43 mm SL; b, ZM-CBSU G 1724, 52 mm SL; Iran: Boein River at road between Baneh and Boeen; c, ZM-CBSU J 1740, 137 mm SL; d, ZM-CBSU J 1725, 143 mm SL; Iran: Little Zab River between Piranshahr and Sardasht.

FIGURE 9. Shape of knob in Squalius namak. a, ZM-CBSU E 780, 98 mm SL; b, ZM-CBSU E 783, 99 mm SL; c, ZM-CBSU G 119, 115 mm SL; d, ZM-CBSU G 120, 129 mm SL; e, ZM-CBSU G 121, 138 mm SL; f, ZM-CBSU G 437, 145 mm SL; Iran: spring Bolagh at Shazand.

FIGURE 10. Shape of knob in Squalius berak. a, ZM-CBSU G 1723, 43 mm SL; b, ZM-CBSU G 1724, 52 mm SL; Iran: Boein River at road at between Baneh and Boeen; c, ZM-CBSU J 1740, 137 mm SL; d, ZM-CBSU J 1725, 143 mm; Iran: Little Zab River between Piranshahr and Sardasht.

FIGURE 11. Shape of knob in Squalius turcicus. a, ZM-CBSU D 522, 70 mm SL; Iran: stream Chay near Vardin; b, IUSHM 1057, 119 mm SL; c, IUSHM 1058, 134 mm SL; d, IUSHM 1059, 148 mm SL; e, IUSHM 1060, 152 mm; f, IUSHM 1061, 153 mm SL; Turkey: stream between Sarikamis and Handere, about 4 km southwest of Sarikamis.