Mycomya occultans ( Winnertz, 1863 )

Väisänen, Rauno, 2014, New Mycomya species from South-East Asia (Diptera, Mycetophilidae), Zootaxa 3815 (4), pp. 526-540 : 533

Mycomya occultans ( Winnertz, 1863)

Material studied. INDONESIA, E. Java, Mt. Ardjoeno, 6000 ft., I. 1936, E. le Moult, 1 ♂ (NHM).

Discussion. Mycomya occultans belongs to the subgenus Mycomya s. str. It has a conspicuous mid-coxal spur and long, narrow medial processus of the tergal part of the male hypopygium. The species is widely distributed in the Palaearctic region ( Väisänen 1984a) and is recorded here as new to the Indonesian fauna. The discovery of M. occultans from Java is quite surprising, although there are also records from India ( Väisänen 1984a), Myanmar ( Väisänen 1996), Shanxi, Zhejiang and Guizhou Provinces of China ( Wu & Yang 1994), the Kuril Islands of the Russian Far East ( Väisänen 1984a), Japan ( Sasakawa 1961, Väisänen 1984b), and South Korea ( Väisänen 2013b). Jakovlev (2011) summarized information on the biology of M. occultans . The species has been recorded from bracket fungi growing on broad-leaved trees. Jakovlev obtained it in Finland from Laxitextum bicolor ( Pers.) Lentz on a rotting birch log on the ground.