LARVAL MORPHOLOGY OF THE WATER MITE LEBERTIA DENSA (ACARIFORMES, LEBERTIIDAE) AND REDESCRIPTION OF ADULTS

摘要

The first illustrated description of the water mite larva Lebertia densa is given. The water mite Lebertia densa Koenike, 1912 is a morphologically polymorphic species (Viets 1987) widely distributed in Europe and Asia. As a result of strong morphological variation, seven species and one subspecies have been described which all were attributed to L. densa by Viets (1987). With the exception of the nominal subspecies, two other subspecies are considered to be valid: L. (Mixolebertia) densa aberrans Sokolow, 1934 and L. (Mixolebertia) densa tenuis Walter (Viets 1987). Larvae are unknown for all above species and subspecies. The purpose of this paper is to describe the larva of L. densa and give a brief redescription of the adults.