DESCRIPTION OF A NEW WATER MITE SPECIES OF THE GENUS PIONA KOCH (ACARI, HYDRACHNIDIA, PIONIDAE) FROM NORTHEASTERN RUSSIA

摘要

A description of a new water mite species Fiona from standing waters of the Kamchatka and Chukotka is given.The aim of this paper is to describe the female, male, deutonymph, and larva of a new water mite species of the genus Piona Koch, 1842.The following abbreviations are used: P-l-5, pedipalp segments (trochanter, femur, genu, tibia and tarsus); I-Leg. 1-6, first leg, segments 1-6 (trochanter, basifemur, telofemur, genu, tibia, and tarsus) i.e. III-Leg-4—genu of third leg; ac. 1-2— genital acetabula (median and lateral); L—length; W—width; D—diameter; n = number of specimens measured. The length of appendage segments was measured along their dorsal side; all measurements are given in micrometers (urn).