after Jürgenstein et al., 2015
Male terminalia. Posterior margin of gonocoxite ventromedially with clear angular convexity, and with abrupt and blunt projections laterally. Posterior impression with narrow base and well widened posterior part. Anterior impression with divergent arms which are sinuate at anterior fourth. Ventral branch of gonostylus with asymmetrical posterior process which bears minute warts and few setae; spine 1 short and sharply pointed; spine 2 blunt, almost twice as high and thick as spine 1; spines 3 and 4 sharply pointed, close to each other and similar in size to spine 1. Ventral branch of gonostylus with a few strong bristles deviating from other setosity laterally on ventral surface. Dorsal branch of gonostylus slightly tapering, lateral margin with shallow concavity; proximal posterior process about three times as high as distal posterior process, both separated with a shallow concavity. Distal posterior process apically and subapically with few setae; proximal posterior process bare and apically rounded. Posterior margin proximally from medial bristle with 4-6 gradually diminishing bristles; internal surface with one somewhat stronger seta next to the medial bristle. Basal angle slightly rounded, basal margin bare. Ejaculatory apodeme with semi-oval base and wide rim. Aedeagus slightly widened apically and with apical margin convex. Aedeagal guides with wide lateral impressions; subapically constricted and apically rounded, not extending upper margin of aedeagus. Aedeagal apodemes laterally angular.
Intraspecific variation. Occasionally the spine 2 on the ventral branch of the gonostylus is somewhat slender and pointed.
Hosts. Mycetophila strobli has been reared from species of Russula, Lactarius, Suillus, Collybia, Armillaria, Kuehneromyces and Cortinarius (Yakovlev 1994, original data).