Two new species of trouts from the Euphrates drainage, Turkey (teleostei: Salmonidae)

Abstract

Salmo okumusi, new species, is described from western tributaries of the Euphrates River. It is distinguished by a greyish body, with the flank and back covered by numerous irregularly shaped small black spots and dots, imparting a peppered or slightly marmorated appearance; few to numerous red spots on body, organized in two to six irregular longitudinal rows on middle part of flank, each red spot usually comprising three or four smaller red dots wholly or partially coalescent; adipose fin grey, conspicuously coloured, with three or four red to orange spots on its free edge; 103-112 lateral line scales; 26-28 scales rows between lateral line and dorsal-fin origin; 18-21 scale rows between anal-fin origin and lateral line; length of maxilla 8.7-9.6 % SL in males, 8.1-9.1 in females. Salmo euphrataeus, new species, is described from northeastern tributaries of the Euphrates River. It is distinguished by a brownish body in life; few (4-54) black spots on body, restricted to back (usually missing in predorsal area) and upper part of flank, mostly anteriorly; few (13-53) red spots on body, usually organized in two to five irregular longitudinal rows on median and lower part of flanks; adipose fin almost reaching base of caudal fin in males larger than 210 mm SL, without or with up to three red or orange spots on free edge; 112-120 lateral line scales; 28-31 scale rows between lateral line and dorsal-fin origin; 20-24 scale rows between anal-fin origin and lateral line; length of maxilla 9.6-11.4 % SL in males, 8.4-10.2 in females.