Two new water mite species from Kyrgyzstan (Acari, Acariformes, Hydrachnidia) Author Pešić, Vladimir Department of Biology, University of Montenegro, Cetinjski put b. b., 81000 Podgorica, Montenegro. E-mail: vladopesic @ gmail. com; https: // orcid. org / 0000 - 0002 - 9724 - 345 X Author Smit, Harry 0000-0002-0376-6808 Naturalis Biodiversity Center, P. O. Box 9517, 2300 RA Leiden, The Netherlands. E-mail: harry. smit @ naturalis. nl; https: // orcid. org / 0000 - 0002 - 0376 - 6808 text Ecologica Montenegrina 2022 2022-11-10 58 69 78 http://dx.doi.org/10.37828/em.2022.58.7 journal article 10.37828/em.2022.58.7 2336-9744 13239956 urn:lsid:zoobank.org:pub:5C5AE7E6-CEAC-4550-96AB-4BB9F3A54686 Sperchon ( Sperchon ) krameri sp. nov. https://zoobank.org/ urn:lsid:zoobank.org:act: D058AFDE-DA60-49A0-B1C9-AC30DC076ECB Figs. 1-3 , 4 B-C Type material — Holotype ♀ , Kyrgyzstan , KR7 Chon-Kemin NP , stream near Ashu resort, Kalman Ashu village , 42º42.906' N , 076º04.767' E , 1542 m asl ., 10.viii.2013 , leg. Pešić & Smit , dissected and slide mounted ( RMNH ) . Paratypes : 1♂ , Kyrgyzstan , KR8 Chon-Kemin NP , upper part of stream near Ashu resort, Kalman Ashu village , 42º42.276' N , 76º05.101' E , 1644 m asl ., 10.viii.2013 , leg. Pešić & Smit , dissected and slide mounted ( RMNH ) . Diagnosis — Integument rugose; postocularia plate equal or slightly larger than glandularia platelets; Cx-III with a glandularium; P-2 with a long distoventral projection, near base of projection, with a stout seta which is equal or just slightly longer than the projection; sexual dimorphism on P-3 ventral margin (distinctly convex in female, slightly convex in male), P-4 long and slender, L/H ratio 7.5-8.1, ventral peg-like setae small, subdividing the ventral margin into three unequal parts, proximal part shorter than medial and distal ones; excretory pore sclerotized; III/IV-L with a few plumose dorsal setae. Description General features — Integument dorsally and ventrally rugose, with flat papillae as showed in Fig. 1 (inset); muscle attachment plates unsclerotized, all glandularia on extended platelets ( Fig. 1 ). Coxal field: Cx-I+II medially close to each other, but not fused; Cx-III with a glandular opening (Cxgl-4) near anterior margin. Genital field: Ac-1-2 longish, Ac-3 more roundish ( Figs. 2A , 3C ). Excretory pore on a sclerotized ring similar in size to neighbouring glandularia ( Fig. 3A ). Gnathosoma with the rostrum shorter than gnathosomal base ( Fig. 3E ). Palp: P-2 with long distoventral projection ( Figs. 2C , 3D ), its tip bearing two fine setae, near base of projection there is stout seta which is slightly shorter than the projection; ventral margin of P-3 nearly straight; P-4 longer than P-3, with two ventral tubercles, bearing small peg-like setae, proximal tubercle slightly larger than distal one, area between peg-like setae subdivides the ventral margin into three unequal parts, proximal part longer than medial and distal ones ( Fig. 2C ). Leg segments slender, III/IV-L with a few plumose dorsal setae ( Fig. 2B ), ambulacrum with claw blade well protruding, bearing a long dorsal and a shorter ventral clawlet. Measurements . Female ( Holotype ) — Idiosoma L 1690; postocularia plate 103 in diameter; distance between anterior end of Cx-I and posterior end of Cx-IV, 747; Cx-III W 981, L Cx-I+II, 325, Cx-III+IV, 438. Genital field (including pregenital sclerite) L/W 303/197, genital valves L 253, pregenital sclerite W 81; L Ac-1-3: 83, 95-98, 67. Palp total 980, dL/H, dL/H ratio: P-1, 59/73, 0.8; P-2, 193/153, 1.26; P-3, 281/130, 2.17; P-4, 381/47, 8.1; P-5, 66/19, 3.5; L ratio P-2/P-4 0.5. Gnathosoma L 269; chelicera L 348, basal segment 266, claw L 86, L ratio cheliceral basal segment/claw 3.1. Leg segments dL: I-L: 113, 131, 194, 297, 319, 275; IV-L: 197, 238, 250, 506, 456, 394. Male ( paratype , n = 1) — Idiosoma L 1375; postocularia plate 97 in diameter; distance between anterior end of Cx-I and posterior end of Cx-IV, 600; Cx-III W 794; L Cx-I+II, 275, Cx-III+IV, 388. Genital field L/W 250/181, genital valves L 231; L Ac-1-3: 72, 78-81, 59-63. Ejaculatory complex ( Fig. 3B ) L 363. Palp total 789, dL/H, dL/H ratio: P-1, 50/53, 0.94; P-2, 156/122, 1.28; P-3, 224/97, 2.3; P-4, 306/41, 7.5; P-5, 53/17, 3.1; L ratio P-2/P-4 0.5. Gnathosoma L 206; chelicera L 303, basal segment L231, claw L 75, L ratio chelicerae basal segment/claw 4.0. Leg segments dL: I-L: 88, 116, 159, 245, 266, 242; IV-L: 164, 194, 194, 400, 369, 316. Figure 1 . Sperchon krameri sp. nov . , ♂ paratype. Dorsum. Inset: integument papillae. Scale bar = 100 µm. Etymology — Named after the Swedish acarologist C.J. Neuman (1839-1912), who erected the genus Sperchon . Discussion — Sperchon krameri . sp. nov. is most similar to S. grigorievka Pešić & Smit, 2020 , known from Kyrgyzstan ( Pešić & Smit 2020 ). Both species have a rugose integument, without sclerotized muscle attachment plates, Cx-III with a glandularium, a rostrum shorter than the gnathosomal base, P-2 with a long ventrodistal projection, excretory pore surrounded by a sclerotized ring similar in size to neighbouring glandularia and IV-L-3-5 with a row of scattered plumose dorsal setae. Sperchon grigorievka which has been found to co-occur with the new species can be separated by more extended plates with the postocularia, a nearly straight ventral margin of P- 3 in the both sexes, and P-4 comparatively shorter (and consequently less slender, L/H ratio 4.4-4.9 in ♀ , 3.2 in ♂ ; data from Pešić & Smit 2020 ) with disctinctly larger ventral- peg like setae (particularly the posteroventral one) which subdivides the ventral margin into three equal parts (compare Figs. 4A and -B ). Figure 2 . Sperchon krameri sp. nov . (A, C, ♀ holotype; B, ♂ paratype). A – coxal and genital field; B – IV-leg; C – palp, medial view. Scale bar = 100 µm Figure 3 . Sperchon krameri sp. nov . , ♂ paratype. A – idiosoma, ventral view; B – photograph of ejaculatory complex; D – palp, lateral view; E – gnathosoma and chelicera. Scale bars = 100 µm. Sperchon glandulosus Koenike, 1886 , a species widely distributed in Central and Northern Europe, including Iceland and the Faroe Islands (Di Sabatino et al . 2010) resembles the new species from Kyrgyzstan but differs in having the excretory pore not completely surrounded by a sclerite ring (see Viets 1936 , fig. 146b). Sperchon glandulosus cubanicus Sokolow, 1940 ) a subspecies originally described by Sokolow (1940) from the Caucasus, and later on reported from Tajikistan ( Sokolow, 1948 ), differs by P-2 with a nearly straight ventral margin and a comparatively shorter ventrodistal projection, and the ventral peg-setae on P-4, somehow larger, subdividing the ventral margin of the segment into three unequal parts, distal part longer than proximal and distal ones (see Sokolow 1940 , fig. 69). Figure 4 . Photographs of palp. A – Sperchon grigorievka , ♂, KR8 Chon- Kemin NP, upper part of stream near Ashu resort; B-C S. krameri sp. nov . B – ♂, KR8 Chon- Kemin NP, upper part of stream near Ashu resort; C – ♀, KR7 ChonKemin NP, stream near Ashu resort. Distribution — Kyrgyzstan ; only known from a stream near Kalman Ashu village ( Fig. 7A ; Fig 18E in Pešić and Smit 2020 ) in the Tien Shan mountains at an elevation of about 1,600 meters.