Two new sympatric water-mites (Acari: Hydrachnidia: Unionicolidae) from the mutelid bivalve Aspatharia sinuata (von Martens) in Nigeria with some data on unionicoline-bivalve relationships

Gledhill, Terence, Vidrine, Malcolm F. (2002): Two new sympatric water-mites (Acari: Hydrachnidia: Unionicolidae) from the mutelid bivalve Aspatharia sinuata (von Martens) in Nigeria with some data on unionicoline-bivalve relationships. Journal of Natural History 36 (11): 1351-1381, DOI: 10.1080/00222930110051734, URL: http://www.tandfonline.com/doi/abs/10.1080/0022293011005173

Unionicola (Mutelicola) planicurvata Gledhill & Vidrine 2002, new species

Unionicola (Mutelicola) planicurvata new species (gures 6–10) Description of male (gures 6a–k, 7a–h, 8a, b). With the characters of the genus and subgenus. Body elongate, tapering posteriorly, without a cauda; length excluding gnathosoma 780 (780–854, 817, n 52), width 440 (n 51). Dorsum (gure 6a) with a single dorsal shield, length 540 (540–588, 564, n 52), width 372 (n 51). Ventrally with epimera in four groups occupying slightly more than half ventral surface, ca the same size as dorsal shield. Anterior groups with prominent posterior apodemes extending beneath anterior margins of Ep.3 before becoming more laterally directed. Posterior groups with a well-dened lateral cleft between Ep.3 and 4 and with wellrounded posterior margins to Ep.4; Ep.4 with pointed lateral extensions at point of IV-Leg insertions (gure 6b). Total epimeral length 488 (488–540, 514, n 52); median length Ep.31 4, 324 (n 51); median length Ep.4, 240 (n 51); epimeral width at Ep.3, 396 (n 51); epimeral width at Ep.4, 426 (n 51). Infracapitulum small, length 156 (144–156, 148, n 53); chelicerae short and stout, length, (162, n 51), cheliceral claw length (dorsal, i.e. short length), (42, n 51). Pedipalps as in gure 6d, e, h–k; P.II with a proximal spine-like seta on outer lateral face and a dorsodistal spine on inner lateral face; P.III with a long hair-like seta on outer lateral face and a shorter, stout seta distally on inner lateral face; P.IV with two to three short hair-like setae on outer lateral face and with a short ventrodistal projection bearing two ne setae; P.V ventrally strongly concave and distally multitoothed (gure 6h–k). Lengths of palp segments: P.I, 13 (12–15, 14, n 54); P.II, 95 (84–105, 95, n 55); P.III, 55 (51–63, 59, n 55); P.IV, 97 (96–105, 99, n 55); P.V, 66 (60–69, 64, n 55). Genital eld at posterior of body, terminal and extending on to dorsum (gure 6a, b); gure 6f shows genital eld of Prep. 1367 in posterior view. Genital eld (gure 6c, f) comprised of two pairs of genital plates; anterior plates each with three acetabula, setae-bearing portion of anterior genital plate may or may not be extended and bears two short, ne setae; posterior plates larger than anterior plates, each with four to ve acetabula and with posterior dorsally-directed setae-bearing extensions bearing three to four setae; gonopore slit-like and anked on either side by two well-separated long setae (gure 6f); genital eld length, (90, n 51), genital eld width, 135 (135–141, 138, n 52). Excretory pore slit-like and free in dorsal integument (gure 6a). Morphology and chaetotaxy of legs as illustrated in gures 7a–h, 8a, b. All legs, particularly III and IV-Legs, with numerous hair-like setae. IV-Leg.3–5 distally with stout curved setae (gure 7e–g). Claws of all legs with barely discernible terminal teeth. Lengths of leg segments: I-Leg.1–6:—(78, n 51), 84 (72–84, 81, n 54), 126 (120–126, 123, n 54), 162 (162–168, 163, n 54), 159 (156–162, 159, n 53), 96 (84–114, 99, n 54); II-Leg.1–6: 60 (n 51), 93 (90–102, 96, n 56), 150 (150, n 56), 192 (192–198, 194, n 56), 195 (192–210, 201, n 56), 129 (120–132, 123, n 56); III-Leg.1–6: 72 (72, n 53), 102 (102, n 56), 162 (156–168, 163, n 56), 197 (195–210, 200, n 55), 216 (216–240, 228, n 56), 156 (150–162, 156, n 55); IV-Leg.1–6:—(96–132, 120, n 53), 114 (114–126, 120, n 54), 180 (174–180, 178, n 54), 210 (210–216, 213, n 54), 258 (258–270, 265, n 54), 198 (198–216, 207, n 54). Female (gures 9a–e, 10a–g). Body larger and rounder than that of male; length, excluding gnathosoma 976 (830–976, 927, n 53), width 646 (622–646, 638, n 53). Dorsum (gure 9a) with a dorsal shield, length 396 (396–492, 456, n 53), width 264 (264–318, 298, n 53). Ventrally with epimera in four groups, similar to those of male but with posterior groups more separated (gure 9b); total epimeral length 462 (462–558, 500, n 53), median length Ep.31 4, 294 (294–318, 306, n 53), median length Ep.4, 210 (210–234, 220, n 53); epimeral width at Ep.3, 426 (426–486, 458, n 53), epimeral width at Ep.4, 528 (528–576, 556, n 53). Infracapitulum and chelicerae similar to those of male, infracapitulum length 147 (147–159, 154, n 53), chelicera length 144 (144–156, 150, n 52), cheliceral claw length (dorsal, i.e. short length) 36 (–, 36, n 52). Pedipalps (gures 9d, e, 10b –g) similar to those of male, lengths of pedipalp segments: P.I, 12 (12–15, 13, n 55); P.II, 98 (96–111, 105, n 5 6); P.III, 63 (57–69, 65, n 56); P.IV, 99 (99–108, 105, n 56); P.V, 60 (60–69, 66, n 56). Genital eld more-or-less terminal (allotype female, Prep. 1369, tilted to show genital eld as depicted in gure 9b, c); gure 10a illustrates genital eld in ventral aspect. Genital eld consisting of two pairs of somewhat triangular wing-like genital plates; anterior plates each with two to ve, generally three, lateral acetabula, two to four short, ne setae on inner margin and posteromedially with two long setae on a strongly sclerotized projection (gures 9c, 10a); posterior genital plates each with ve to eight lateral acetabula, sclerotized setae-bearing (two to four) posterior extensions long and narrow (gure 9c) and anteromedially with a single stout seta (gures 9c, 10a); gonopore slit-like; genital eld length 192 (150–192, 171, n 52), genital eld width 204 (204–240, 224, n 53). Excretory pore slit-like and free in integument. Morphology and chaetotaxy of legs similar to those of male; IV-Leg.3–5 also as male with distal stout curved setae. Lengths of leg segments: I-Leg.1–6: 60 (60–66, 63, n 52), 78 (78–84, 80, n 53), 120 (120–126, 122, n 53), 156 (156–174, 162, n 53), 144 (144–168, 152, n 53), 90 (90–102, 94, n 53; II-Leg.1–6: 60 (60–69, 65, n 53), 90 (90–102, 97, n 55), 144 (144–156, 151, n 56), 186 (186–198, 194, n 56), 192 (192–210, 202, n 56), 123 (120–138, 128, n 56); III-Leg.1–6: 72 (72–78, 73, n 55), 102 (102–108, 103, n 56), 153 (150–162, 159, n 56), 192 (192–204, 200, n 56), 216 (216–234, 228, n 56), 153 (144–156, 151, n 55); IV-Leg.1–6: 126 (108–126, 121, n 54), 114 (114–132, 124, n 56), 168 (168–186, 177, n 56), 210 (210–234, 223, n 56), 252 (252–282, 270, n 56), 198 (198–216, 205, n 56). Material examined. Three males: holotype, Prep. 1366; paratypes, Preps 1365 and 1367; three females: allotype, Prep. 1369; paratypes Preps 1368 and 1370. Several unmounted specimens preserved in Koenike’s Fluid. All material collected by Prof. John Blay from Asa Reservoir, Ilorin, Nigeria. Etymology. The specic epithet is formed from the latin words plane meaning distinctly and curvatus meaning curved. The name alludes to the strongly curved pedipalp tarsus (P.V). Deposition of material. The holotypes and allotypes of Unionicola blayi and Unionicola planicurvata will be deposited in The Natural History Museum, London. Paratypes and material preserved in Koenike’s will be retained in the collection held by T.G. Separation of U. blayi and U. planicurvata. Whilst closely related, the two species are readily separated; the main characters are found in the shape of the posterior margins of Ep.I: straight in U. blayi and rounded in U. planicurvata; the curvature of the pedipalp tarsus (P.V): strongly curved in U. planicurvata; the form of the setae-bearing extensions to the posterior pair of genital plates: long and narrow in U. planicurvata and more-or-less absent or short in the female of U. blayi and the presence, in U. planicurvata, of the stout, curved, distal setae on the telofemur, genu and tibia of the fourth leg (IV-Leg.3–5) which are absent in U. blayi.Published as part of Gledhill, Terence & Vidrine, Malcolm F., 2002, Two new sympatric water-mites (Acari: Hydrachnidia: Unionicolidae) from the mutelid bivalve Aspatharia sinuata (von Martens) in Nigeria with some data on unionicoline-bivalve relationships, pp. 1351-1381 in Journal of Natural History 36 (11) on pages 1361-1367, DOI: 10.1080/00222930110051734, http://zenodo.org/record/529857

Unionicola (Mutelicola) blayi Gledhill & Vidrine 2002, new species

Unionicola (Mutelicola) blayi new species (gures 1–5) Description of male (gures 1a–f, 2a–l, 3a–d). With the characters of the genus and subgenus. Body elongate and without a cauda; length excluding gnathosoma 878 (634–878, 720, n 55), width 598 (512–610, 563, n 55). Dorsum (gure 1a) with a single dorsal shield, length 498 (324–498, 385, n 55). Ventrally with epimera in four groups occupying ca half ventral surface and with anterior groups well separated from posterior groups; anterior groups with prominent posterolaterally-directe d apodemes; posterior groups with a well-dened lateral cleft between Ep.3 and 4 and with more-or-less straight posterior margins to Ep.4 (gure 1b)—in some specimens the posterior margins appear straighter and more at right angles to the long axis of the body; Ep.4 with pointed lateral extensions at point of IV-Leg insertions (gure 1b); total epimeral length 504 (354–504, 409, n 55); median length Ep.31 4, 258 (198–258, 215, n 55); median length Ep.4, 180 (132–180, 148, n 55); epimeral width at Ep.3, 420 (414–450, 433, n 54); epimeral width at Ep.4, 468 (414–486, 461, n 54). Infracapitulum small, length 168 (156–192, 174, n 55); chelicerae short and stout, basal portion reticulate, length 192 (168–192, 186, n 55), cheliceral claw length (dorsal i.e. short length) 39 (36–42, 39, n 55). Pedipalps as in gures 1d–f, 2a–i; P.II with a proximal spine-like seta on outer lateral face and a dorsodistal spine on inner lateral face; P.III with a long ventrodistal hair-like seta on outer lateral face and a shorter pectinate seta distally on inner lateral face; P.IV with two short hair-like setae on outer lateral face and a short ventrodistal projection bearing two ne setae. P.V ventrally concave and distally multitoothed (gures 1e, 2g, i). Lengths of pedipalp segments: P.I, 18 (15–18, 18, n 59); P.II, 123 (108–126, 119, n 59); P.III, 90 (78–90, 85, n 59); P.IV, 132 (108–132, 124, n 510); P.V, 84 (66–84, 78, n 510). Genital eld at posterior end of body, terminal and almost dorsal (holotype, male, Prep. 1360, tilted to show genital eld as depicted in gure 1b). Genital eld (gures 1c, 2j, k, l) comprised of two pairs of genital plates; anterior plates each with two to ve or more (generally three) acetabula; setae-bearing portion of anterior genital plates may be separate from acetabula-bearing portion (gure 2j); posterior plates larger than anterior plates and each with 9–14 acetabula; gonopore slit-like and anked on each side by two adjacently-located long setae; genital eld length 123 (123–144, 134, n 54), genital eld width 153 (123–156, 145, n 55). Excretory pore slit-like, free in posterior integument and dorsal to posterior genital sclerite. Morphology and chaetotaxy of legs as illustrated in gure 3a–d. I-Leg.4–5 (genu and tibia) more-or-less equal. Segment 5 (tibia) of all legs, particularly I-Leg.5, convex dorsally in lateral view, more obvious than shown in gure 3a–d. All legs, particularly III and IV, with numerous hair-like setae. Claws of all legs with two distal teeth, ventral tooth ca twice length of dorsal tooth and with a small pre-distal lateral accessory tooth. Lengths of leg segments: I-Leg.1–6: 66 (60–72, 67, n 56), 90 (72–96, 86, n 59), 132 (102–132, 124, n 510), 186 (150–192, 175, n 510), 186 (150–192, 174, n 510), 123 (90–126, 113, n 510); II-Leg.1 –6:— (66, n 51), 105 (78–108, 100, n 58), 156 (120–156, 147, n 59), 210 (162–216, 200, n 59), 228 (174–228, 213, n 59), 162 (138–162, 149, n 59); III-Leg.1–6: 72 (66–72, 70, n 53), 108 (84–108, 99, n 59), 159 (120–162, 144, n 59), 213 (168–222, 201, n 59), 251 (180–252, 228, n 59), 186 (126–186, 165, n 58); IV-Leg.1–6: 120 (114–138, 127, n 54), 114 (78–120, 105, n 58), 198 (150–198, 181, n 58), 258 (198–264, 238, n 58), 336 (252–342, 308, n 57), 252 (192–252, 228, n 57). Female (gures 4a–g, 5a–d). Body rounder and larger than that of male; length, excluding gnathosoma, 1075 (1025–1171, 1110, n 54), width 756 (756–915, 845, n 54). Dorsum (gure 4a) without a dorsal shield but with two pairs of muscle attachment sites. Ventrally with epimera in four groups occupying ca half ventral surface (gure 4b), anterior groups well separated from each other and from posterior groups and with prominent posterolaterally-directe d apodemes; lateral cleft between Ep.3 and 4 well dened; posterior margin of Ep.4 more-or-less straight as in male; Ep.4 with pointed lateral extensions at point of IV-Leg insertions; epimeral groups of each side further apart from each other than in male, this separation may be less in immature females; total epimeral length 522 (408–522, 484, n 55), median length Ep.31 4, 258 (240–258, 251, n 54), median length Ep.4, 186 (180–192, 186, n 54); epimeral width at Ep.3, 552 (486–634, 572, n 55), epimeral width at Ep.4, 658 (612–744, 679, n 55). Infracapitulum and chelicerae as in male, infracapitulum length 174 (162–190, 175, n 53), chelicera length 204 (174–204, 189, n 52), cheliceral claw length (dorsal, i.e. short length) 42 (n 51). Pedipalps (gures 4c, d, 5b, d) similar to those of male, lengths of pedipalp segments: P.I, 18 (18–24, 20, n 58); P.II, 132 (126–144, 135, n 56); P.III, 118 (102–120, 112, n 56); P.IV, 138 (138–162, 149, n 56); P.V, 87 (84–90, 89, n 55). Genital eld (gures 4b, e, f, g; 5b, d) terminal (allotype female, Prep. 1361; female, Prep. 1375; female, Prep. 1364, tilted to show genital eld as depicted in gures 4b, e, 5c, respectively); gure 4f, g depict genital eld (Prep. 1375) in ventral and lateral aspects, respectively, drawn prior to nal microscope preparation. Genital eld consisting of two pairs of somewhat rectangular-shaped genital plates; anterior (ventral) genital plates each with three to four laterally sited acetabula, anteromedially with three short setae and posteromedially with two long setae on a strongly sclerotized projection; posterior (dorsal) genital plates each with 9–12 laterally-sited acetabula, anteromedially, i.e. when viewed as in gures 4e, 5c, with a single long stout seta, a few short setae associated with the acetabula; gonopore slit-like; genital eld length 210 (198–228, 212, n 53), genital eld width 252 (222–270, 250, n 55). Excretory pore slit-like, free in posterior integument and dorsal to posterior genital sclerite. Morphology and chaetotaxy of legs as illustrated for male. Lengths of leg segments: I-Leg.1–6:—(72–78, 75, n 52), 93 (90–108, 103, n 58), 141 (138–150, 147, n 58), 198 (192–216, 210, n 58), 189 (186–216, 205, n 58), 120 (120–126, 122, n 58); II-Leg.1–6:—(72, n 51), 117 (114–126, 120, n 57), 168 (168–186, 177, n 57), 231 (228–264, 246, n 57), 249 (246–282, 265, n 57), 168 (162–174, 169, n 57); III-Leg.1–7: 78 (78–90, 84, n 54), 114 (108–126, 123, n 58), 174 (174–192, 185, n 58), 243 (240–276, 261, n 57), 264 (252–306, 290, n 57), 198 (186–198, 194, n 56); IV-Leg.1–6: 138 (138–162, 148, n 55), 132 (132–150, 143, n 58), 231 (228–252, 244, n 58), 303 (300–336, 319, n 58), 366 (366–408, 391, n 58), 261 (258–282, 268, n 58) Material examined. Five males: holotype, Prep. 1360; paratypes, Preps 1356, 1357, 1358 and 1359; ve females: allotype, Prep. 1361; paratypes, Preps 1362, 1363, 1364 and 1375. All material collected by Prof. John Blay from Asa Reservoir, Ilorin, Nigeria, no date supplied but shortly after April 1983 (personal communication). Etymology. The species is named for Prof. John Blay Jr who collected and sent this material to T.G.Published as part of Gledhill, Terence & Vidrine, Malcolm F., 2002, Two new sympatric water-mites (Acari: Hydrachnidia: Unionicolidae) from the mutelid bivalve Aspatharia sinuata (von Martens) in Nigeria with some data on unionicoline-bivalve relationships, pp. 1351-1381 in Journal of Natural History 36 (11) on pages 1355-1361, DOI: 10.1080/00222930110051734, http://zenodo.org/record/529857

Piona alpicola Neuman 1880

<i>Piona alpicola</i> (Neuman, 1880) <p> <i>Piona falcigera</i> Koenike, 1905, <b>nov. syn</b>.; <i>Piona brehmi</i> Walter, 1910, <b>nov. syn</b>.; <i>Piona dentipes</i> Lundblad, 1962, <b>nov. syn</b>.; <i>Piona trisetica bituberosa</i> K. Viets, 1930, <b>nov. syn</b>.</p> <p> <b>Material examined.</b> <i>Piona trisetica tuberosa</i>: Holotype male, Ihl-See near Segeberg, Holstein, Germany, 24-ix- 1924, leg. Lundbeck (slide 4023, coll. Viets, SMF). <i>Piona dentipes</i>: Holotype male, Lake Sautusjärvi, Sweden, 10- viii-1917, leg. Lundblad (slide 5389, SMNH). Paratype female, same data as holotype (slide 5390, SMNH). Other material: male, Lake Jukkasjärvi, Sweden, 10-viii-1917, leg. Lundblad (slide 5903, SMNH); 3 males, 2 females, lake Sautusjärvi, Sweden, 10-viii-1917, leg Lundblad (tube, SMNH). <i>Piona brehmi</i>: male, female, Södermanland, lake Kyrksjön, Sweden, 31-v-1924, leg Lundblad (resp. slide 755, 756, SMNH); male, stream Österdalälven near Idre, Dalarna, Sweden, 8-viii-1918, leg Lundblad (slide 5918, SMNH); female.</p> <p> Lundblad (1962) described <i>Piona dentipes</i> based on the different claw of III-L-6. This claw is straight and pointed in <i>P. dentipes</i>, in <i>P. alpicola</i> it is curved and narrowed distally. However, Lundblad (1962) did not illustrate III-L-6 of <i>P. al picol a</i> correctly, and the shape is dependant on the position of this leg segment. In fact it is bifurcated, but usually from a lateral view only one claw can be seen well. The shapes of the palps of the two species are similar. Lundblad (1962) illustrated the medial side of the right palp, with the distal setae of P-5 rather small, and P-4 with three distinct setal tubercles and one less distinct setal tubercle. In lateral view the left palp has four distinct setal tubercles, and P-5 with distinct distal setae (as in <i>P. alpicola</i>). The female of <i>P. dentipes</i> is similar to the female of <i>P. alpicola</i>, with a semi-circular pre-genital sclerite. Therefore we conclude that the two species are conspecific. <i>Piona brehmi</i> has a similar III-L-6 as <i>P. alpicola</i>, and should therefore also be synonymized with that species. Lundblad (1962) synonymized <i>P. trisetica tuberosa</i> with <i>P. brehmi</i> (which we agree upon), but as the latter is now a synonym of <i>P. alpicola</i>, also the former is a synonym of <i>P. alpicola</i>.</p>Published as part of <i>Smit, Harry, Gerecke, Reinhard, Pešić, Vladimir & Gledhill, Terence, 2015, On the taxonomic state of water mite taxa (Acari: Hydrachnidia) described from the Palaearctic, part 3, Hygrobatoidea and Arrenuroidea with new faunistic data, pp. 542-552 in Zootaxa 3981 (4)</i> on pages 549-550, DOI: 10.11646/zootaxa.3981.4.5, <a href="http://zenodo.org/record/242595">http://zenodo.org/record/242595</a&gt

Unionicola inusitata Koenike 1914

<i>Unionicola inusitata</i> Koenike, 1914 <p> <i>Unionicola finisbelli</i> Ramazzotti, 1947 — <b>nov syn</b>.</p> <p> When comparing the description of <i>U. finisbelli</i> by Ramazzotti (1947) with <i>U. inusitata</i>, it appeared that <i>U. inusitata</i> has the same bifurcated setae on the female genital plates as <i>U. finisbelli</i>, but, until now they were never observed. Moreover, <i>U. inusitata</i> and <i>U. finisbelli</i> have exactly the same palps in shape and chaetotaxy. The same holds for the female and male genital plates as a whole. The inner margins of the male genital plates of <i>U. finisbelli</i> also have a curve directed to the midline. <i>Unionicola finisbelli</i> therefore is placed into synonymy under <i>U. inusitata</i>.</p>Published as part of <i>Smit, Harry, Gerecke, Reinhard, Pešić, Vladimir & Gledhill, Terence, 2015, On the taxonomic state of water mite taxa (Acari: Hydrachnidia) described from the Palaearctic, part 3, Hygrobatoidea and Arrenuroidea with new faunistic data, pp. 542-552 in Zootaxa 3981 (4)</i> on page 547, DOI: 10.11646/zootaxa.3981.4.5, <a href="http://zenodo.org/record/242595">http://zenodo.org/record/242595</a&gt

Arrenurus

<i>Arrenurus (s.str.)</i> <i>denticulatus</i> Motaş, 1927 <p> <i>Arrenurus furciger</i> K. VIETS, 1935 — <b>nov. syn</b>.</p> <p> Tyahun (1970) was the only author who noted and discussed the similarity of <i>A. denticulatus</i> and <i>A. furciger</i>. According to Tyahun, differences between the two species are found in the length of the setae on the dorsum (long in <i>furciger</i>, short in <i>denticulatus</i>), the shape of the dorsal margin of the petiole (rounded in <i>furciger</i>, triangular in <i>denticulatus</i>), the shape of the setae associated with the petiole (bifurcated in <i>furciger</i>) and the number of setae on P-2 (six in <i>furciger</i>, five in <i>denticulatus</i>). The number of teeth on the ventral side of the petiole shows much variation, and cannot be used to separate the two species. The only important difference between <i>A. furciger</i> and <i>A. denticulatus</i> is found in the setae associated with the petiole: bifurcated in <i>furciger</i>, and simple in <i>denticulatus</i>. However, the bifurcated setae are difficult to observe and may therefore have been overlooked by previous authors. All other differences are either not important (setae on P-2), or probably the result of inadequate illustrations (setae on the dorsum) or are variable characters (shape of the posterior margin of the petiole). Consequently, we propose to synonymize the two species.</p>Published as part of <i>Smit, Harry, Gerecke, Reinhard, Pešić, Vladimir & Gledhill, Terence, 2015, On the taxonomic state of water mite taxa (Acari: Hydrachnidia) described from the Palaearctic, part 3, Hygrobatoidea and Arrenuroidea with new faunistic data, pp. 542-552 in Zootaxa 3981 (4)</i> on page 550, DOI: 10.11646/zootaxa.3981.4.5, <a href="http://zenodo.org/record/242595">http://zenodo.org/record/242595</a&gt

Javalbia bella Cook 1974

<i>Javalbia bella</i> Cook, 1974 <p> <b>Material examined.</b> France, dept. Lozère, Le Gordon de Mialet at Le Martinet, 44º 0 9.371 N, 3º 50.449 E, alt. 229 m a.s.l., 29-vi-2014, 0/1/0, leg H. Smit.</p> <p>Since the first description of this species from Spain (Cook 1974), this species has been recorded only once, from Corsica (Gerecke & Di Sabatino 2013). This is the first record from continental France.</p>Published as part of <i>Smit, Harry, Gerecke, Reinhard, Pešić, Vladimir & Gledhill, Terence, 2015, On the taxonomic state of water mite taxa (Acari: Hydrachnidia) described from the Palaearctic, part 3, Hygrobatoidea and Arrenuroidea with new faunistic data, pp. 542-552 in Zootaxa 3981 (4)</i> on page 550, DOI: 10.11646/zootaxa.3981.4.5, <a href="http://zenodo.org/record/242595">http://zenodo.org/record/242595</a&gt

Arrenurus

<i>Arrenurus (s.str.) refractariolus</i> Biesiadka, 1978 <p> <b>Material examined. Montenegro</b>. <b>3</b> /0/0, Lukavica Mt., Bare Bojovića, 42°42.823’ N, 19°13.983’ E, 1475 m asl, pools, 05-viii-2010, leg. V. Pešić.</p> <p> <i>Arrenurus (s.str.) refractariolus</i> is a rare species, thus far known only from Poland and Sicily.</p>Published as part of <i>Smit, Harry, Gerecke, Reinhard, Pešić, Vladimir & Gledhill, Terence, 2015, On the taxonomic state of water mite taxa (Acari: Hydrachnidia) described from the Palaearctic, part 3, Hygrobatoidea and Arrenuroidea with new faunistic data, pp. 542-552 in Zootaxa 3981 (4)</i> on page 551, DOI: 10.11646/zootaxa.3981.4.5, <a href="http://zenodo.org/record/242595">http://zenodo.org/record/242595</a&gt

Atractides diastema Szalay 1935

<i>Atractides diastema</i> Szalay, 1935 <p> <b>Species incerta.</b> Since the first description from a female collected in a stream in Hungary, this species has been recorded only once again in Poland (Biesiadka 1973) and the male remained unknown until the present-day. Biesiadka (1973) correctly refused the proposal of Besseling (1954) to synonymize <i>A. diastema</i> with <i>A. distans</i> K. Viets, 1914 (Gerecke 2003). However, the attribution of the specimens from Poland remains unclear, both due to morphological differences as compared with the original description, and due to insufficient information on some character states in the latter. In many cases, species described from females cannot be recognized with certainty; as in many genera, males bear more characters suitable for species definition. As the type specimen of <i>A. diastema</i> is lost, a well-founded diagnosis is not possible and it must be considered a <i>species incerta</i>.</p>Published as part of <i>Smit, Harry, Gerecke, Reinhard, Pešić, Vladimir & Gledhill, Terence, 2015, On the taxonomic state of water mite taxa (Acari: Hydrachnidia) described from the Palaearctic, part 3, Hygrobatoidea and Arrenuroidea with new faunistic data, pp. 542-552 in Zootaxa 3981 (4)</i> on page 544, DOI: 10.11646/zootaxa.3981.4.5, <a href="http://zenodo.org/record/242595">http://zenodo.org/record/242595</a&gt

Limnesia (Limnesia) arevaloi subsp. arevaloi K. Viets 1918

<i>Limnesia (Limnesia) arevaloi arevaloi</i> K. Viets, 1918 <p> <i>Limnesia martianezi</i> Lundblad, 1962 — <b>nov. syn</b>.</p> <p> <b>Material examined.</b> Holotype female, SMNH 6013, Tenerife, spring Martiánez near Puerto de la Cruz, Lundblad 24.04.1960. La Gomera, Cedro u. Caseria, kl. Saltadero, Moos, 11.09.1992 Beyer coll. (1/1/0).</p> <p> In the original description, Lundblad (1962a) compared this species only with <i>L. atlantica</i> Lundblad, 1942 from Madeira. He proposed as a diagnostic difference to that species the insertion of the ventral peg-like seta on P- 2 on a short socket, and a more slender shape of the gnathosoma and chelicera. All these character states are equally found in <i>L. arevaloi</i>, a species in good agreement also with regard to the variability of idiosoma and appendage measurements (Gerecke 1991). Under all morphological aspects there is no doubt that <i>L. martianezi</i> is a junior synonym of <i>L. arevaloi</i>. On the Canary islands, the presence of the latter (sub)species (characterized by immovable genital flaps in the male sex) is now confirmed also by the new records from Gomera.</p>Published as part of <i>Smit, Harry, Gerecke, Reinhard, Pešić, Vladimir & Gledhill, Terence, 2015, On the taxonomic state of water mite taxa (Acari: Hydrachnidia) described from the Palaearctic, part 3, Hygrobatoidea and Arrenuroidea with new faunistic data, pp. 542-552 in Zootaxa 3981 (4)</i> on page 543, DOI: 10.11646/zootaxa.3981.4.5, <a href="http://zenodo.org/record/242595">http://zenodo.org/record/242595</a&gt