Acarina 24 (2): 181–233 © Acarina 2016 MORPHOLOGY AND TAXONOMY OF LARVAE OF THE GENUS HYDRYPHANTES KOCH, 1841 (ACARI, HYDRACHNIDIA, HYDRYPHANTIDAE) IN RUSSIA Petr V. Tuzovsky Institute for Biology of Inland Waters, Russian Academy of Sciences, Borok, Nekouz. Distr., Yaroslavl Prov., Russia E-mail:
[email protected] ABSTRACT: This study presents a taxonomic review of water mite larvae of the genus Hydryphantes Koch, 1841 (Hydryphan- tidae) found in the fauna of Russia during the long-term survey period of 1974–2016. The review includes (re)descriptions and illustrations of 14 Hydryphantes species found in the country: H. clypeatus (Thor, 1899), H. crassipalpis Koenike, 1914, H. dispar (Schaub, 1888), H. hellichi Thon, 1899, H. ildensis Tuzovskij, 2016, H. nonundulatus Thon, 1899, H. octoporus Koenike, 1896, H. placationis Thon, 1899, H. planus Thon, 1899, H. prolongatus Thon, 1899, H. ruber (Geer, 1778), H. ruberoides Tuzovskij, 1990, H. samaricus Tuzovskij, 2014, and H. tenuipalpis Thor, 1899. KEY WORDS: Hydryphantidae, Hydryphantes, morphology, larvae, females, identification keys, Russia. DOI: 10.21684/0132-8077-2016-24-2-181-233 INTRODUCTION The word fauna of the genus Hydryphantes samaricus Tuzovskij, 2014 from Samara Province currently includes over 100 species and subspecies and Yaroslavl Province (Tuzovskij 2014), and H. (K. O. Viets 1987). The water mites of the genus ildensis Tuzovskij, 2016 from Yaroslavl Province are free-living in standing waters, also temporary (Tuzovskij 2016). In addition, three more species pools, ditches and rarely in running waters. From have been found in the territory of the Yaroslavl the territory of the former USSR, the following 19 Province: H.