(Fig. 12:5, p. 182 in Benick & Lohse 1974; Fig. 4 in Topp 1975)
Aleochara fungi Gravenhorst, 1806: 157.
Achromata fusiformis Casey, 1893: 301, syn. nov.
Atheta (Acrotona) fungi: Bernhauer, 1907: 398 (as valid species).
Dimetrota (s. str.) nuptalis Casey, 1910a: 100, syn. nov.
Acrotona (s. str.) lividula Casey, 1910a: 147, syn. nov.
Acrotona (s. str.) adjuvans Casey, 1910a: 149, syn. nov.
Atheta (Acrotona) fungi: Fenyes, 1920: 224 (as valid species).
Atheta (Acrotona) fusiformis: Fenyes, 1920: 226 (as valid species).
Atheta (Dimetrota) nuptalis: Fenyes, 1920: 205 (as valid species; misspelled as nuptialis).
Atheta (Acrotona) lividula: Fenyes, 1920: 225 (as valid species).
Atheta (Acrotona) adjuvans: Fenyes, 1920: 225 (as valid species).
Atheta (Acrotona) fungi: Bernhauer & Scheerpeltz, 1926: 673 (as valid species).
Atheta (Acrotona) fusiformis: Bernhauer & Scheerpeltz, 1926: 674 (as valid species).
Atheta (Dimetrota) nuptalis: Bernhauer & Scheerpeltz, 1926: 664 (misspelled as nuptialis; as valid species).
Atheta (Acrotona) lividula: Bernhauer & Scheerpeltz, 1926: 675 (as valid species).
Atheta (Acrotona) adjuvans: Bernhauer & Scheerpeltz, 1926: 672 (as valid species).
Atheta (Mocyta) fungi: Benick & Lohse, 1974: 180.
Atheta fungi: Topp, 1975: 101 (as valid species; intraspecific variability discussed).
Atheta (Acrotona) fungi: Moore & Legner, 1975: 362 (as valid species).
Atheta (Acrotona) fusiformis: Moore & Legner, 1975: 362 (as valid species).
Atheta (Dimetrota) nuptalis: Moore & Legner, 1975: 368 (as valid species; misspelled as nuptialis).
Atheta (Acrotona) lividula: Moore & Legner, 1975: 365 (as valid species).
Atheta (Acrotona) adjuvans: Moore & Legner, 1975: 353 (as valid species).
Acrotona fungi: Seevers, 1978: 246 (as valid species).
Acrotona (Achromata) fusiformis: Seevers, 1978: 256 (as valid species).
Dimetrota nuptalis: Seevers, 1978: 259 (as valid species; misspelled as nyptalis).
Acrotona (s. str.) lividula: Seevers, 1978: 256 (as valid species).
Acrotona (s. str.) adjuvans: Seevers, 1978: 256 (as valid species).
Atheta (Xenota) fungi: Muona, 1984: 229.
Type material. Syntypes of Aleochara fungi: ♀, “5499”, “Europa Nr. 5499”, “Typus” (red label); “ Zool. Mus. Berlin ”, “ fungi Gr. ”; 4♀♀, 1 specimen, “Europa Nr. 5499”, “Typus” (red label), “ Zool. Mus. Berlin ”; ♀, “Sue… Schüpp”, “Nr. 5499”, “Typus” (red label), “ Zool. Mus. Berlin ”; 1 specimen, “Austr…”, “Nr. 5499”, “Typus” (red label), “ Zool. Mus. Berlin ” (ZMHB).
Holotype of Achromata fusiformis: ♀, “N.[ew] Y.[ork][near New York City (H.H.Smith)]”, “ Achromata fusiformis ”, “TYPE USNM 38990” (red label), “CASEY bequest 1925” (NMNH).
Holotype of Dimetrota nuptalis: ♀, “R.[hode] I.[sland]”, “ nuptalis Csy. ”, “TYPE USNM 39114” (red label), “CASEY bequest 1925” (NMNH).
Lectotype of Acrotona lividula (here designated): ♀, “Portland, Oreg.[on]”, “ lividula Csy. ”, “TYPE USNM 38981” (red label), “CASEY bequest 1925” (NMNH). Paralectotypes: 2♀♀, “Portland, Oreg.[on]”, “ lividula PARATYPE USNM 38986” (red label), “CASEY bequest 1925” (NMNH).
Lectotype of Acrotona adjuvans (here designated): ♀, “ W.H.H. Ottawa, Can.[ada, Carrington leg.]”, “ adjuvans Csy. ”, “TYPE USNM 38986” (red label), “CASEY bequest 1925” (NMNH). Paralectotypes: 10♀♀ (3 broken), “ W.H.H. Ottawa, Can.[ada, Carrington leg.]”, “ adjuvans PARATYPE USNM 38986” (red label), “CASEY bequest 1925” (NMNH).
Additional material. CANADA: New Brunswick: Sunbury Co.: ♀, Acadia Research Forest, pitfall trap, 21.ix.1999 (G.Gesner) (LFC); Ontario: 3♀♀, environs of Ottawa, v–vi.1998 (V.Grebennikov) (SPSU); Québec: ♀, Lac Dumont, 4.viii.1994 (SPSU); ♀, Lac Mitis, 19.vii.1993 (SPSU); ♀, St. JacquesdeLeeds, 25.vi.1992 (SPSU); 1 specimen, Bellam (LFC); 1 specimen, Anticosti, 22.vi.1993 (LFC); 1 specimen, Lac à l’Epaule, 15.viii.1994 (LFC); 1 specimen, Lowry (LFC); UNITED STATES: Maine: Lincoln Co.: ♀, Sheepscot River, 7.viii.1992 (N.Yu.Klyuge) (SPSU); Massachusetts: Berkshire Co.: 12 km N Pittsfield, 42º33.12'N 73º13.97'W, 350 m, in forest litter, Acer, Pinus, Tsuga, Quercus, 23.ix.1998 (V.I.Gusarov) (SPSU); Minnesota: Lake Co.: 3♀♀, 22 km NE Two Harbors, Split Rock Lighthouse State Park, Hwy. 61, 47º10.99'N 91º24.52'W, 70 m, in forest litter, Betula, Picea, Populus, Rubus, Mayanthemum, ferns, 10.vii.1999 (V.I.Gusarov) (SPSU); UNITED KINGDOM: Staffordshire: 2♀♀, near Gailey, ponds, SJ934101, 24.i.1993 (V.I.Gusarov) (SPSU).
Diagnosis. See Benick & Lohse (1974).
Discussion. The holotypes of Achromata fusiformis, Dim. nuptalis and the lectotypes of Acrotona lividula and Acro. adjuvans agree completely with European specimens of Moc. fungi (and the syntypes of Aleochara fungi) in external characters and the shape of spermatheca.
Distribution. In North America Moc. fungi is known from Newfoundland (Muona 1984), New Brunswick, Québec, Ontario, Maine, Rhode Island, Massachusetts, New York, Minnesota, and Oregon.