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- Atractides ussuriensis Sokolow, 1940: 347.
SOUTH KOREA: CR3 River Inje, 38°03.961'N, 128°10.516'E, 225 m asl., 8.x.2012 Pešić & Karanović 0/1/0 (mounted, NIBRIV0000268851).
Female. General features. Shoulder platelets fused to the large dorsal plate (Fig. 9B); Cxgl-4 posterior to Cxgl-2 (Fig. 9A), glandular pore Cxgl-4 distanced from Cxgl-2 by 50-55 µm; excretory pore and Vgl-2 clearly posterior to the line of primary sclerotization; suture of Cx-IV curved; P-2 longer than P-4; P-4 with four well developed ventral tubercles (Fig. 9C).
Measurements. Idiosoma (ventral view: Fig. 9A) L 838, W 569; dorsal shield (Fig. 9B, 11D-E) L 694, W 501, L/W ratio 1.39; dorsal plate L 661; frontal plate L 142-147, W 50, L/W ratio 2.8-3.0; gnathosomal bay L 170, Cx-I total L 313, Cx-I medial L 142, Cx-II+III medial 52; ratio Cx-I L/Cx-II+III medial L 6.1; Cx-I medial L/Cx-II+III medial L 2.7; distance between glandular openings of Cxgl-4 and Cxgl-2 51–54. Genital field L/W 171/150, L/W ratio 1.14; distance genital field–excretory pore 181, genital field–caudal idiosoma margin 305. Gnathosoma vL 359; chelicera total L 434; palp total L 358, dL: P-1, 46; P-2, 114; P-3, 69; P-4, 109; P-5, 20; P-2/P-4 ratio 1.05.
Torrenticola ussuriensis was originally described by Sokolow (1934) from the Primory Territory in the Russian Far East, and later reported from River Inôzava in Japan (Enami 1940). Recently this species was redescribed by Pešić et al. (2011) based on new material from the Russian Far East. A single female specimen examined from River Inje agrees well with the redescription of Torrenticola ussuriensis. The only difference is found in the excretory pore lying on the same level as Vgl-2 in specimen from Korea while in specimens from Russia and Japan (see: Enami 1940) the excretory pore is shifted slightly posterior to Vgl-2.
A permanent sandy/bouldery river with considerably exposure to sunlight (Fig. 14E).
Far East of Russia (Primory and Khabarovsk Territory, Jewish Autonomous and Amurskaya Area - “Atractides semisutus” Sokolow 1934; Pešić et al. 2011); Japan (Uzi region – “Atractides semisutus” Enami 1940). New for the fauna of Korea.
- Pešić, V; Semenchenko, K; Lee, W; 2013: Torrenticolid water mites from Korea and the Russian Far East ZooKeys, 299: 21-48. doi
- Sokolow I (1934) Beiträge zur Kenntnis der Hydracarinenfauna des Ussuri Gebietes II. Hydracarinen der fließenden Gewässer. Zoologische Jahrbücher, Abteilung für Systematik, Ökologie und Geographie der Tiere 65: 309-388.
- Enami M (1940) Water mites from Izu. I. Rheophilous water mites from river Inôzawa. Tohoku Daigaku. Science reports of Tôhoku University (Series 4, Biology), 15: 203–259.
- Pešić V, Semenchenko K, Chatterjee T, Yam R, Chan B (2011) New records of water mites of the family Torrenticolidae (Acari, Hydrachnidia) with descriptions of two new species from Nanshih River system in Taiwan and redescription of Torrenticola ussuriensis (Sokolow, 1940) from the Russian Far East. ZooKeys 116: 1-14. doi: 10.3897/zookeys.116.1253