Atheta crassicornis (Fabricius, 1792)

Material. Kharkiv region: environs of Haidary, moist ravine forest, on old carpophores of Gymnopus dryophilus, 17. VI.1992, 2 spec. ; ditto, highland oak forest, on old and rotten carpophores of Agaricus silvaticus, 23. VI.1992, 1 spec. ; ditto, moist ravine forest, on old and rotten carpophores of Kuehneromyces mutabilis, 23. VI. 1992, 1 spec. ; ditto, highland oak forest, on fallen trees, on carpophores of Neolentinus schaefferi, 26. VI.1992, 3 spec. ; ditto, highland oak forest, on old carpophores of Russula rosea, 6.VII.1992, 3 spec. ; ditto, on carpophores of Marasmius oreades, 9.VII.1992, 1 spec. ; ditto, on rotten carpophores of Boletus badius, 9.VII.1992, 2 spec. ; ditto, on carpophores of Coprinus micaceus, 24.VII.1992, 2 spec. ; ditto, on carpophores of Russula cyanoxantha, 1.VIII.1992, 3 spec. ; ditto, on carpophores of Russula pseudointegra, 1.VIII. 1992, 1 spec. ; ditto, on carpophores of Agaricus silvaticus, 1.VIII.1992, 2 spec. ; ditto, dry ravine forest, on carpophores of Russula decolorans, 8.VIII.1992, 2 spec. ; ditto, on carpophores of Boletus badius, 8.VIII.1992, 2 spec. ; ditto, on carpophores of Trametes gibbosa, 8.VIII.1992, 5 spec. ; ditto, on sporophores of myxomycete Fuligo septica, 8.VIII.1992, 3 spec. ; ditto, on old carpophores of Artomyces pyxidatus, 8.VIII.1992, 2 spec. ; ditto, moist ravine forest, on carpophores of Kuehneromyces mutabilis, 16.VIII.1992, 5 spec. ; environs of Korobiv Khutir, highland oak forest, on fallen trees, on carpophores of Pluteus cervinus, 3.VIII.1992, 1 spec. ; environs of Zadonetske, artificial pine forest, on carpophores of Amanita fulva, 30. VI.1992, 1 spec. ; ditto, on carpophores of Macrolepiota procera, 28.VII.1992, 3 spec. ; environs of Chuhuiv, forest belt, on old carpophores of Lactarius insulsus, 10.VIII.1992, 2 spec. ; ditto, 15.VIII.1992, 2 spec.; ditto, 30.VIII.1992, 3 spec. (Supplement, Tab. 1).

Bionomics. Active predator that inhabits natural and artificial forests, on open steppe areas and meadows with different humidity level, where it lives in forest cover and plant remains and in mosses. As accidental mycetobiont, it occurs in rotten and dry carpophores of fungi.

Distribution. North Africa, Europe, Asia Minor (Schülke & Smetana 2015).