Oxynoemacheilus theophilii Stoumboudi, Kottelat & Barbieri 2006

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 : 471-472

Oxynoemacheilus theophilii Stoumboudi, Kottelat & Barbieri 2006

( Fig. 13 )

Oxynoemacheilus theophilii Stoumboudi, Kottelat & Barbieri 2006:140 , Figs. 8–9 (type locality: Lesbos Island , Tsingou springs, in Evergetoulas drainage, Greece)

Barbatula bergamensis Erk‘akan, Nalbant & Özeren 2007:71, Fig. 3 (type locality: Bergama , Kozak (Madra) Creek, 39°40‘N, 27°28‘E, Turkey)

Material examined. FFR 15538, 21, 36–56 mm SL; Turkey: İzmir prov.: Karadere stream a tributary of Bakır River 15 km east of Bergama , 39.1299 27.3723.— FSJF 3052 , 17 , 33–58 mm SL; Turkey: İzmir prov.: Kemer stream at Aşağımahalle, 4 km north of Bergama , 39.1559 27.1600 .

Additional distribution records. Erk’akan et al. 2007: 39.1147 27.2839; Barbieri et al. 2015: 39.1744 26.4223; unpublished records: 39.1000 26.3500, 39.2600 27.2700.

Diagnosis. Oxynoemacheilus theophilii is distinguished by a combination of characters none of them unique to the species. It is distinguished from O. anatolicus , O. angorae , O. eregliensis , O. isauricus , O. germencicus and O. nasreddini by having an almost uniform body depth between the dorsal- and caudal-fin bases, or body depth very slightly decreasing (depth of caudal peduncle 87–97% of body depth at anterior-most dorsal fin base vs. 68–79 in O. anatolicus , 70–83 in O. angorae and O. eregliensis , 72–82 in O. germencicus , 60–77 in O. isauricus , and 70–86 in O. nasreddini ). It is further distinguished by having a moderately deep caudal peduncle (caudal-peduncle depth 1.3–1.6 times in length (vs. 1.5–1.8 in O. angorae and O. germencicus , 1.5–1.9 in O. eregliensis , 2.2–2.6 in O. isauricus , 1.5–2.1 in O. nasreddini ), an emarginate caudal fin (middle caudal-fin ray 71–80% of length of longest upper caudal-fin ray vs. slightly emarginate or almost truncate, 84–93 in O. anatolicus , 88–92 in O. angorae , 83–91 in O. eregliensis and deeply emarginate, 65–76 in O. mediterraneus ), and no depigmented stripe along the anterior part of the lateral line (vs. usually present in O. angorae ). It is further distinguished from O. mediterraneus by the tip of pectoral fin not reaching the pelvic-fin origin in male (vs. usually reaching).

Distribution. Oxynoemacheilus theophilii is found in the Bakır River drainage in western Anatolia. It also occurs on the Greek island of Lesbos.

Remarks. Based on our COI dataset, O. theophilii is well separated from all other studied Oxynoemacheilus species, including by a minimum K2P distance of 2.7% to O. eliasi , its closest relative. It is also supported as a distinct species by the PTP approach, but not by the mPTP delimitation.

Figures

FIGURE 3. Oxynoemacheilus anatolicus, FFR 15590, 60 mm SL; stream flowing to Karamanlı reservoir.

FIGURE 8. Oxynoemacheilus germencicus, HUIC: BM-3, paratypes of O. cinicus, from top: 57 mm SL; 49 mm SL; 46 mm SL; 44 mm SL; Cin stream.

FIGURE 9. Oxynoemacheilus germencicus, ventral view of bony swim bladder capsules. Upper row, from left: FSJF 2323, 54 mm SL, 55 mm SL, 46 mm SL, 50 mm SL, 47 mm SL; lower row, from left: FSJF 2536, 62 mm SL, 66 mm SL, 64 mm SL, 62 mm SL, 61 mm SL.

FIGURE 13. Oxynoemacheilus theophilii, FSJF 3052, 53 mm SL; Kemer stream.