Phoxinus

Denys, Gaël P. J., Dettai, Agnès, Persat, Henri, Daszkiewicz, Piotr, Hautecoeur, Mélyne & Keith, Philippe, 2020, Revision of Phoxinus in France with the description of two new species (Teleostei, Leuciscidae), Cybium 44 (3), pp. 205-237 : 226

Key to French species of Phoxinus (male)

1a. – Z4 green; belly continuously red between pectoral and caudal fin bases....................... Phoxinus csikii

1b. – Z4 yellow or greyish; belly white, grey, black or red, if red, then red colour not extended to caudal fin base...... 2

2a. – Flank bars reaching from Z2 to Z3, forming a stripe along Z3....................................... 3

2b. – Flank bars reaching from Z2 to Z4 or Z5, not forming a stripe along Z3................................... 4

3a. – A green stripe along Z3; Z4 yellow-green; pectoral fin yellow; no yellow dot between mouth and eye; lateral line incomplete, usually reaching to a point anterior of anal fin origin or slightly beyond base of last anal fin ray; 50-74 pored scales along lateral line; snout slightly stout; two scaled patches at pectoral fin bases separated by an unscaled area............................ Phoxinus dragarum

3b. – A black stripe along Z3; Z4 greyish; pectoral fin yellow-orange with a red blotch behind inner fin base; a yellow dot between mouth and eye; lateral line complete or incomplete, reaching beyond anal fin base to caudal fin base in some individuals; 73-86 pored scales along lateral line; snout slightly pointed; breast completely covered by scales between pectoral fin bases in some populations (two scaled patches at pectoral fin bases separated by an unscaled area in others)........................ Phoxinus septimaniae

4a. – Bars crossing Z1 and Z5 black; belly greyish to black; anal fin margin straight to convex....... Phoxinus bigerii

4b. – Bars crossing Z3 and Z4 green; belly red, pinkish or pale orange; anal fin margin straight to slightly concave................................................. 5

5a. – Z4 bright yellow; flank bars green with sharp margins; lips, pectoral, pelvic and anal fin bases and belly red; pectoral fin orange; snout stout and blunt.................................................. Phoxinus fayollarum

5b. – Z4 greenish yellow; flank bars green with diffuse margin; lips, pectoral, pelvic and anal fin bases pinkish, belly pinkish or pale orange; pectoral-fin yellow; snout slightly pointed.......................... Phoxinus phoxinus