taxonID	type	description	language	source
670187899F2BD838FF2BFAE4FC00F92B.taxon	description	https: // www. zoobank. org / urn: lsid: zoobank. org: act: 4 A 55 DC 35 - 58 B 3 - 4 B 4 C-BC 14 - 159 FD 3 EC 2439 Figure 1	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2BD838FF2BFAE4FC00F92B.taxon	materials_examined	Material examined — Holotype ♂, dissected and slide mounted (RMNH), Türkiye, Trabzon Province, Maçka, Hamsiköy stream, Black Sea basin, 40.68833 ° N, 39.45472 ° E, 19 Oct. 2024, leg. Pešić, Zawal, BaytaŞoğlu, Kumru & Bayçelebi, sequenced (Voucher Id: CCDB 48502 C 01; BOLD id: HDRIZ 025 - 24).	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2BD838FF2BFAE4FC00F92B.taxon	diagnosis	Diagnosis. Male (female unknown) — Morphological: Integument smooth (possibly due to the molecular analysis treatment) but occasionally fine striation is visible; posteromedial margin of Cx-I triangular, projecting; anterior margin of genital plate with a small, knob-shaped medial projection. Molecular: This lineage, represented by a unique BIN (BOLD: AGO 8958) differs from Hygrobates anatolicus clade by 16.1 % K 2 P for COI.	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2BD838FF2BFAE4FC00F92B.taxon	description	Description. Male — Integument smooth (possibly due to the molecular analysis treatment) but occasionally fine striation is visible. Posteromedial margin of Cx-I triangular (Figure 1 A), Cx-IV medial margin nose-like protruding. Anterior margin of genital plate with a small, knob-shaped medial projection, posterior margin indented (Figure 1 B); acetabula arranged in an obtuse triangle: excretory pore unsclerotized. Palp as illustrated in Figure 1 C; P- 2 ventral margin straight, distally forming a right angle, denticles covering two-thirds of the ventral margin of both P- 2 and P- 3; P- 4 ventral setae on the same level. Measurements — Idiosoma L 1260, W 1175. Coxal shield L 569; Cx-III W 700; Cx-I + II L 469, Cx-I + II lL 450. Genital field L / W 281 / 331, ratio 0.85, L Ac- 1 - 3: 94, 122 - 125, 105. Ejaculatory complex L 213. Palp — total L 655; dL / H: P- 1, 41 / 56; P- 2, 173 / 109; P- 3, 145 / 91; P- 4, 223 / 47; P- 5, 73 / 25. Chelicera L 433, basal segment L 291, claw L 150. dL of I-L- 2 – 6: 138, 198, 275, 284, 259; dL of IV-L: 184, 203, 291, 425, 426, 353. Female — Unknown.	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2BD838FF2BFAE4FC00F92B.taxon	etymology	Etymology — The species is named for Prof. Dr. Davut Turan (Recep Tayyip Erdogan University, Rize, Türkiye) for his great contribution to the knowledge of the ichthyofauna of Türkiye.	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2BD838FF2BFAE4FC00F92B.taxon	description	Species delimitation using DNA-barcodes — The final alignment for species delimitation using COI sequence data comprised 658 nucleotide positions (nps) from 30 Hygrobates specimens listed in Table 2 and one outgroup, Atractides nodipalpis from the Netherlands. The NJ tree is presented in Figure 2. The COI tree sequence retrieved from a specimen of H. turani sp. nov. from Türkiye appeared as a sister taxon of H. anatolicus Esen & Pešić, 2013. The mean genetic distance between COI sequences of these two species was estimated at 16.1 % K 2 P. Only one specimen of the new species could be acquired for use in molecular analyses, so intraspecific differences in COI sequence could not be examined.	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2BD838FF2BFAE4FC00F92B.taxon	discussion	Discussion — Based on COI data, the new species from northeastern Türkiye appears to be most closely related to Hygrobates anatolicus, a species known from eastern Türkiye (Esen et al. 2013). Males of H. anatolicus can be distinguished from the new species by having a lineated integument (occasionally forming irregular ridges), a less projecting posteromedial margin of Cx-I, and larger genital acetabula (Esen et al. 2013).	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2BD838FF2BFAE4FC00F92B.taxon	distribution	Distribution — Türkiye; known only from the type locality (Figure 6 A).	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2DD831FF2BF901FC75FE58.taxon	description	https: // www. zoobank. org / urn: lsid: zoobank. org: act: E 469 BBBD- 40 AE- 4557 - B 53 D-FE 41907 BE 3 F 4 Figures 3 - 4	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2DD831FF2BF901FC75FE58.taxon	materials_examined	Material examined — Holotype ♂, dissected and slide mounted (RMNH), Türkiye, Rize Province İkizdere, Çockor stream, 40.68667 ° N, 40.70111 ° E, 20 Oct. 2024, leg. Pešić, Zawal, Kumru & Bayçelebi, sequenced (Voucher Id: CCDB 48502 B 01; BOLD id: HDRIZ 013 - 24). Paratype: one ♀, dissected and slide mounted (RMNH), same site and date as the holotype, sequenced (Voucher Id: CCDB 48502 B 02; BOLD id: HDRIZ 014 - 24).	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2DD831FF2BF901FC75FE58.taxon	diagnosis	Diagnosis — Morphological: Male genital plate anterior margin slightly concave, not indented; Ac- 3 subtriangular, not elongated. Molecular: This lineage represented by a unique BIN (BOLD: AGO 5566) differs from Atractides gibberipalpis clade by 17.3 % K 2 P for COI.	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2DD831FF2BF901FC75FE58.taxon	description	Description. General features — Integument striated, muscle insertions unsclerotized; mediocaudal margin CxI straight or slightly concave, apodemes of Cx-II in an acute angle with the median line. Ac in a weakly curved line, subtriangular in shape. Excretory pore smooth; Vgl- 1 not fused to Vgl- 2. Palp with strong sexual dimorphism. I-L- 5 setae S- 1 and S- 2 separated, S- 1 longish with truncate tip, S- 2 proximally enlarged; I-L- 6 curved, proximally slightly thickened, with parallel dorsal and ventral margins from the centre to the claw pit (Figure 3 D). Male — Genital plate anterior margin slightly concave, posterior margin indented (Figure 3 B); P- 2 and P- 3 each with a distinct ventral extension, P- 4 slightly protruding near proximoventral seta, length of ventral setae not exceeding the length of the segment, P- 4 sword seta slightly distal to proximoventral seta (Figure 3 C). Female — genital plates medial margin with concavity on the level of Ac- 2; ventral margin of P- 2 slightly convex at distal edge; P- 2 and P- 3 without projections, ventral margins of P- 3 slightly concave, ventral margin of P- 4 nearly straight (Figure 4 C). Measurements. Male (holotype; CCDB 48502 B 01) — Idiosoma L 600, W 488; maximum diameter Dgl- 4, 25. Coxal shield L 338; Cx-III W 392; Cx-I + II mL 103, Cx-I + II lL 241. Genital field L / W 117 / 127, ratio 0.92, L Ac- 1 - 3: 38 - 41, 41 - 47, 50. Palp — total L 323; dL / H: P- 1, 31 / 34; P- 2, 77 / 55; P- 3, 78 / 47; P- 4, 103 / 40; P- 5, 34 / 16. Capitulum vL 138; chelicera total L 225. Legs — I-L- 5 dL 210, vL 143, dL / vL ratio 1.47, maximum H 58, dL / maximum H 3.62, S- 1 L 98, L / W ratio 8.9, S- 2 L 83, L / W ratio 6.6, distance S- 1 - 2, 18, dL ratio S- 1 / 2 1.18; I-L- 6 dL 128, central H 26, dL / central H ratio 4.9; L I-L- 5 / 6 ratio 1.64. Female (paratype; CCDB 48502 B 02) — Idiosoma L 820, W 644. Coxal shield L 397; Cx-III W 503; Cx-I + II mL 122, Cx-I + II lL 272. Genital field L / W 175 / 216, genital plates L 128 - 134, pregenital sclerite W 86, gonopore L 150, L Ac- 1 - 3 41 - 44, 52 - 53, 56. Egg maximum diameter (n = 1) 178. Palp — total L 404; dL / H: P- 1, 39 / 33; P- 2, 94 / 59; P- 3, 108 / 52; P- 4, 125 / 38; P- 5, 38 / 16. Capitulum vL 166; chelicera total L 272. Legs — I-L- 5 dL 270, vL 187, dL / vL ratio 1.44, maximum H 67, dL / maximum H 4.0, S- 1 L 114, L / W ratio 8.1, S- 2 L 97, L / W ratio 5.9, distance S- 1 - 2, 26, dL ratio S- 1 / 2 1.17; I-L- 6 dL 160, central H 30, dL / central H ratio 5.3; L I-L- 5 / 6 ratio 1.69.	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2DD831FF2BF901FC75FE58.taxon	etymology	Etymology — The new species is named after Karadeniz region which include type locality of the new species.	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2DD831FF2BF901FC75FE58.taxon	description	Species delimitation using DNA-barcodes — The final alignment for species delimitation using COI sequence data comprised 664 nucleotide positions (nps) from 44 Atractides specimens listed in Table 2 and one outgroup, Hygrobates fluviatilis from Serbia. The NJ tree is presented in Figure 5. The COI tree sequence retrieved from specimens here described as Atractides karadenizensis sp. nov. from Türkiye appeared as a sister taxon of A. gibberipalpis Piersig, 1898. The mean genetic distance between COI sequences of these two species was estimated at 17.3 % K 2 P. The mean intraspecific K 2 P distance within the new species cluster was 0.51 %.	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2DD831FF2BF901FC75FE58.taxon	discussion	Discussion — The new species morphologically most closely resembles Atractides gibberipalpis Piersig, 1898. This rhithrobiontic species, considered widely distributed across the Palaearctic region (e. g., Gerecke et al. 2016; Pesic & Erman 2006), can be distinguished from the new species by the shape of the male genital plate, in which Ac- 3 is strongly elongated and drop-shaped (Gerecke 2003; Pešić & Smit 2021). The high genetic distance between the new species and A. gibberipalpis (COI 17.3 % K 2 P) suggests a long independent evolutionary history for the new species. Atractides yazdensis Pešić, Smit & Saboori, 2021, a species originally described from south Iran differs from the new species in I-L with enlarged penultimate segment bearing a truncated sword seta S- 1 and P- 4 sword seta slightly proximal to posteroventral hair (see Pešić et al. 2021 b).	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F2DD831FF2BF901FC75FE58.taxon	distribution	Distribution — Türkiye; known from Rize province (Figure 6 B).	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F24D831FF2BFABDFCD7F953.taxon	materials_examined	Material examined. Türkiye. Trabzon Province, Maçka, Kalyan Creek, 40.86194 ° N, 39.69805 ° E, 19 Oct. 2024, leg. Pešić, Zawal, BaytaŞoğlu, Kumru & Bayçelebi 1 / 0 / 0 (1 / 0 / 0 barcoded).	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F24D831FF2BFABDFCD7F953.taxon	discussion	Remarks. The examined specimen in our study matches the description of Hygrobates grabowskii, a species originally described from Iran (Pešić et al. 2019). Genetic data indicate that specimens from Trabzon fall within BOLD: AFH 9674, which, in addition to the specimens from this study, includes specimens from Georgia. The nearest neighboring BIN is BOLD: AEG 5071, which contains specimens of H. grabowskii from northern Iran. The p - distance between these two BINs was estimated at 6.38 %, suggesting a phylogeographic break between the Iranian and Turkish / Georgian populations of this species.	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F24D831FF2BFABDFCD7F953.taxon	distribution	Distribution: Iran (Pešić et al. 2019). New for Türkiye.	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F24D831FF2BFD41FEB5FB37.taxon	materials_examined	Material examined. Türkiye: Trabzon Province, Çaykara, Çataklı Stream, Uzungöl Lake Basin, 40.76722 ° N, 40.25611 ° E, 19 Oct. 2024, leg. Pešić, Zawal, BaytaŞoğlu, Kumru & Bayçelebi 0 / 1 / 0 (barcoded).	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F24D831FF2BFD41FEB5FB37.taxon	discussion	Remarks. The examined specimen from Trabzon used in this study for molecular analysis matches the description of Sperchon milisai, a species previously known only from the Western Balkans (Pešić et al. 2025 c). The molecularly studied specimens from eastern Türkiye form a unique BIN (BOLD: AGO 5836), with the nearest neighboring BIN being BOLD: AGG 3937, which includes a single specimen of S. milisai from Bosnia and Herzegovina. The p - distance between these two BINs was estimated at 4.65 %. As emphasized by Pešić (2022), it is likely that, due to the unsclerotized excretory pore, females of S. milisai were previously confused with S. clupeifer, a species frequently reported from streams in Europe and Türkiye (Erman et al. 2010; Pešić et al. 2025 c). Males of S. clupeifer, however, can be readily distinguished by their dorsal shield, more slender palps (P- 4 L / H ratio> 5.5), and differently shaped ejaculatory complex (see Pešić 2022).	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
670187899F24D831FF2BFD41FEB5FB37.taxon	distribution	Distribution: Western Balkan (Montenegro, Croatia, Albania, Bosnia and Herzegovina; Pešić et al. 2025 c). New for Türkiye.	en	Pešić, Vladimir, Bayçelebi, Esra, Zawal, Andrzej, Bańkowska, Aleksandra, Jovanović, Milica, Kumru, Salih, Baytaşoğlu, Hazel, Kalayci, Gökhan (2026): Molecular diversity of water mites of the Turkish eastern Black Sea basin, with the description of two new species (Acari, Hydrachnidia). Zootaxa 5763 (3): 391-406, DOI: 10.11646/zootaxa.5763.3.5, URL: https://doi.org/10.11646/zootaxa.5763.3.5
