observation for the mushroom is here https://www.inaturalist.org/observations/204436243
probably: Megalodacne fasciata FABRICIUS, 1777
Range of Erotylidae: Tropical America, Oceania, Australia, Asia and Africa
range: [Chujo & Chujo, 1989]: India (north and south), Vietnam, Hainan; ['Heller, 1920]: Sri Lanka, Indonesia (Sundaland reg.), Thailand, Myanmar /
Genus: Megalodacne (antennae with the 3rd joint distinctly longer than the 4th) [2]
Tribe Encaustini CROTCH, 1876 (= Megalodacninae sensu GUPTA, 1969 n. syn) [1]
Subfamily: Erotylinae
Family: Erotylidae (Pleasing fungus beetles, Pilzkäfer)
Superfamily: Cucujoidea
Infraorder: Cucujiformia
Suborder: Polyphaga
Order: Coleoptera (beetles, Käfer)
Indonesia. W-Java, 10 km S Tangerang: vic. Serpong (Kampung), 50m asl., 26.10.2010; (IMG_6227)