Hygrobates (Rivobates) diversiporus Sokolow, 1927

Esen, Yunus, Pesic, Vladimir, Erman, Orhan & Kaya, Yuecel, 2013, New water mites of the family Hygrobatidae (Acari, Hydrachnidia) from Turkey, ZooKeys 361, pp. 15-25 : 19-21

Hygrobates (Rivobates) diversiporus Sokolow, 1927 Figs 3, 4

Material examined.

Turkey,Malatya Province, Doğanşehir, Avcapınar stream, 38°00'38"N, 37°57'56"E, 1335 m asl., 04.07.2004, (7/24/0).

Compared material.

Senckenberg Museum Frankfurt, Germany, Hygrobates (Decabates) quanaticola , holotype, ♂, P.J/15, Locality. Quanat near Rezazeh, 29.9.1974 coll. Schwoerbel; präp. J/14, Hygrobates (Decabates) quanaticola , ♀, Quanat near Rezazeh, 29.9.1974, Schwoerbel.

Morphology.

General characters. Posteromedial margin of Cx-I convexly rounded, medial margin of Cx-IV rounded; genital field with 8-13 pairs of acetabula. Ventral margin P-2 proximally concave, distally protruding in a nose- or knob-shaped projection bearing denticles, distal part of P-3 ventral margin covered by denticles, P-4 ventral setae distance 14-19 µm.

Male (n =3):Idiosoma L 805-890 W 690-783; median length of Cx-I + gnathosoma 232-240. Genital field (Figs 3 B–D) L 188-191, W 242-273, posterior margin strongly indented. Gonopore L 88-90, distance between genital field and excretory pore 72-100. Palp (Fig. 3A): total L 366-388, dL: P-1, 30-32; P-2, 96-104; P-3, 69-70; P-4, 130-140; P-5, 41-42; chelicera L 210-225.

Female (n =5): Idiosoma L 815-1058 W 670-910; median length of Cx-I + gnathosoma 243-248; genital plate (Figs 3 F–H) L 167-180, W 100-104. Distance between genital field and excretory pore L 83-110, genital opening L 200-250, maximum diameter of egg 170. Palp (Fig. 3E): total L 374, dL: P-1, 32-35; P-2, 100-103; P-3, 70-72, P-4, 140-142; P-5 43-45; chelicera L 225-247.

Remarks.

Sokolow (1927) described Hygrobates diversiporus based on one male and one female specimen from a first order stream in Caucasus. Later on this species has been reported by Bader (1955) from the Ohrid Lake in Macedonia. The latter record of this probably rithrobiontic species from a lacustrine habitat, require confirmation for a better understanding of its geographical distribution. The specimens from Turkey agree well with the type specimen in the shape of male genital field orginally desribed by Sokolow (1927) in German as reverse heart-shaped ( “verkehrt-herzförmig”), with an acute anterior angle and a indented posterior margin having a broad, rounded median notch.

The second member of subgenus Rivobates Thor known from Turkey, Hygrobates quanaticola Schwoerbel & Sepasgozarian, 1976, has been orginally described from Iran ( Schwoerbel and Sepasgozarian 1976), and later on reported from Kayseri, Elazığ and Afyon provinces in Turkey ( Erman et al. 2010). This species differs (based on re-examination of the holotype) from Hygrobates diversiporus in the shape of male genital field with irregularly convex posterior margin (compare Figures 3 B–D and 4).

Habitat.

Rhithrobiont.

Distribution.

Russia (Caucasus). New for Turkey.