Oxynoemacheilus angorae

Yoğurtçuoğlu, Baran, Kaya, Cüneyt & Freyhof, Jörg, 2022, Revision of the Oxynoemacheilus angorae group with the description of two new species (Teleostei: Nemacheilidae), Zootaxa 5133 (4), pp. 451-485 : 456-457

Key to species of Oxynoemacheilus angorae group

1a Caudal-peduncle depth 2.2–2.6 times in its length................................................... O. isauricus

1b Caudal-peduncle depth 1.2–2.1 times in its length............................................................ 2

2a Caudal fin deeply emarginate, middle caudal-fin ray 65–76% of length of longest upper caudal-fin ray; body usually with elongate blotches; blotches on flank usually connected to saddles, meeting contralateral on flank.......... O. mediterraneus

2b Caudal fin slightly emarginate or almost truncate, middle caudal-fin ray 71–98 % of length of longest upper caudal-fin ray; body mottled, marbled, with vermiculated pattern or with roundish blotches; blotches on flank usually not connected to saddles, not meeting contralateral on flank......................................................................... 3

3a Belly with few, small, embedded scales; caudal fin emarginate, middle caudal-fin ray 71–91% of length of longest upper caudal-fin ray (76–91% in O. nasreddini , 71–84% in other species).............................................. 4

3b Belly without scales; caudal fin slightly emarginate or almost truncate, middle caudal-fin ray 83–98% of length of longest upper caudal-fin ray......................................................................................... 7

4a Body depth almost uniform between dorsal- and caudal-fin bases (depth of caudal peduncle 87–99% of body depth at anteriormost dorsal fin base).......................................................................... O. theophilii

4b Body depth decreasing between dorsal- and caudal-fin bases (depth of caudal peduncle 69–87% of body depth at anteriormostdorsal fin base).................................................................................... 5

5a Usually a series of vertically elongated blotches along lateral midline, not meeting contralateral on flank; tip of pectoral fin usually reaching to or slightly beyond pelvic-fin origin in male........................................ O. nasreddini

5b Flank with roundish blotches in variable size, forming a variable pattern between coarse marbled and fine mottled; tip of pectoral fin usually not reaching to or reaching pelvic-fin origin in male.......................................... 6

6a Caudal-peduncle depth 1.3–1.5 times in its length; scales on belly present from midline between pectoral- and pelvic-fin bases to pelvic-fin base............................................................................... O. eliasi

6b Caudal-peduncle depth 1.5–1.8 times in its length; scales on belly restricted between pelvic-fin bases, rarely exceeding anteriorly................................................................................. O. germencicus

7a Flank with a series of dark-brown midlateral blotches usually fused into a wide, irregular shaped midlateral stripe, rarely a mottled pattern; usually with a depigmented stripe along anterior part of lateral line......................... O. angorae

7b Flank with irregularly set and shaped, distinct or confluent blotches and spots forming a marbled or mottled pattern, with large roundish brown blotches in some individuals, without midlateral stipe; without a depigmented stripe along anterior part of lateral line........................................................................................... 8

8a Flank completely covered by scales; pre-dorsal back usually with 3–4 saddles............................ O. anatolicus

8b Few isolated scales on flank in front of dorsal-fin origin; pre-dorsal back with dark-brown, fine, mottled pattern, without saddles.............................................................................................. 9

9a Dorsal and ventral adipose crests not elevated from dorsal and ventral profiles, straight, very rarely convex; dorsal adipose crest reaching behind vertical of posterior anal-fin base, absent in some individuals; caudal peduncle depth 1.5–1.9 times in its length; shortest middle caudal-fin ray is 83–91% of longest ray of upper caudal-fin lobe; flank usually with irregularly set and shaped, large blotches distinct from each other, forming a marbled pattern............................... O. eregliensis

9b Dorsal and ventral adipose crests elevated from dorsal and ventral profiles, usually with convex margin; dorsal adipose crest reaching to or exceeding vertical of anal-fin base; caudal peduncle depth 1.2–1.6 times in its length; shortest middle caudal-fin ray is 88–98% of longest ray of upper caudal-fin lobe; flank usually with irregularly set and shaped, confluent, small blotches and spots, forming a mottled pattern; rarely with larger blotches forming a marbled pattern..................... O. axylos