In synonymy:
Blaniargus Simon, 1913 = Micrargus Dahl, 1886 (Denis, 1950a: 248)
Nothocyba Simon, 1926 = Micrargus Dahl, 1886 (Denis, 1949a: 142, sub Blaniargus)
Plexisma Hull, 1920 = Micrargus Dahl, 1886 (Denis, 1949a: 142, sub Blaniargus)

type Neriene herbigradus Blackwall, 1854; gender masculine

N.B.: considered a senior synonym of Blaniargus Simon, 1913: 365 [urn:lsid:nmbe.ch:spidergen:05429] (type B. cupidon Simon, 1913) by Denis, 1950e: 248; Blaniargus was considered a senior synonym of Nothocyba Simon, 1926: 440, 517 [urn:lsid:nmbe.ch:spidergen:05430] (type Erigone subaequalis Westring, 1851) by Denis, 1949a: 142); Nothocyba is an objective junior synonym of Plexisma Hull, 1920a: 10 [urn:lsid:nmbe.ch:spidergen:04157] (type Erigone subaequalis Westring, 1851); Wunderlich's (1970: 406) synonymy of Micrargus with Ceratinopsis Emerton, 1882 has not been accepted by later authors.

Transferred to other genera:
Micrargus acuitegulatus Oi, 1960 -- see Pseudomicrargus
Micrargus asakawaensis Oi, 1964 -- see Pseudomicrargus
Micrargus dilutus (Denis, 1948) -- see Panamomops
Micrargus kaestneri Wiehle, 1961 -- see Metapanamomops
Micrargus latitegulatus Oi, 1960 -- see Pseudomicrargus

In synonymy:
Micrargus aleuticus Holm, 1960 = Micrargus pacificus (Emerton, 1923) (Buckle et al., 2001: 132).
Micrargus canescens Denis, 1952 = Micrargus apertus (O. Pickard-Cambridge, 1871) (Millidge, 1976: 147).
Micrargus herbigradus carpaticus Georgescu, 1971 = Micrargus herbigradus (Blackwall, 1854) (Millidge, 1976: 147).
Micrargus herbigradus majus Simon, 1926 = Micrargus apertus (O. Pickard-Cambridge, 1871) (Rėlys & Weiss, 1997: 492).
Micrargus mordens (Thorell, 1871) = Micrargus apertus (O. Pickard-Cambridge, 1871) (Millidge, 1976: 147).

Nomen dubium:
Micrargus incomtus (O. Pickard-Cambridge, 1873a: 748, pl. 65, f. 2, mf, Germany, originally in Erigone) -- Breitling et al., 2015: 72.

Micrargus alpinus Rėlys & Weiss, 1997: 492, f. 1, 5-11, 15, 19 (Dmf).

Neriene aperta O. Pickard-Cambridge, 1871a: 450 (Df).
Erigone mordens Thorell, 1871a: 144 (Dm) [urn:lsid:nmbe.ch:spidersp:062955].
Porrhomma apertum O. Pickard-Cambridge, 1900b: 31.
Blaniargus herbigradus majus Simon, 1926: 439, 517 (Dmf) [urn:lsid:nmbe.ch:spidersp:062954].
Micrargus canescens Denis, 1952b: 2, f. 1-4 (Dm) [urn:lsid:nmbe.ch:spidersp:062952].
Micrargus herbigradus Locket & Millidge, 1953: 283, f. 171D (m; misidentified per Millidge, 1976: 147).
Micrargus apertus Palmgren, 1976: 79, f. 33b.5-6, 8 (mf).
Micrargus apertus Millidge, 1976: 147, f. 3-5, 8, 10-11, 14, 20 (mf, removed from S of Micrargus herbigradus [rejecting Jackson, in Simon, 1926: 516], S of M. canescens [removed from S of M. herbigradus, rejecting Georgescu, 1971: 237] and M. mordens [removed from S of M. herbigradus, rejecting Simon, 1884a: 537]).
Micrargus apertus Millidge, 1977: 30, f. 104 (m).
Micrargus apertus Saito, Takahashi & Sagara, 1979: 11, f. 22, 25 (f).
Micrargus apertus Nellist, 1980: 39, f. 2-3, 8 (m).
Micrargus apertus Saito, 1982a: 49, f. 1-2 (m).
Micrargus apertus Roberts, 1987: 80, f. 34e, 38h (mf).
Micrargus apertus Heimer & Nentwig, 1991: 214, f. 579 (mf).
Micrargus apertus Rėlys & Weiss, 1997: 492, f. 2, 12, 16, 20 (m, S of Micrargus herbigradus majus).
Micrargus apertus Ono, Matsuda & Saito, 2009: 288, f. 434-436 (mf).
Micrargus apertus Wiśniewski, Rozwałka & Wesołowska, 2018: 152, f. 16-18, 25-27 (mf).
Micrargus apertus Kielhorn & Gebert, 2022: 19 (m).

Micrargus cavernicolus Wunderlich, 1995f: 532, f. 5-10 (Dmf).
Micrargus cavernicola Ono, Matsuda & Saito, 2009: 290, f. 440-443 (mf).

Blaniargus cupidon Simon, 1913: 365 (Df).
Blaniargus cupidon Simon, 1926: 439, 517, f. 775-777 (f, Dm).

Micrargus dissimilis Denis, 1950d: 73, f. 18-19 (Df).

Enguterothrix fuscipalpis Denis, 1962g: 197, f. 39-40 (Df).
Micrargus fuscipalpis Tanasevitch, 2016c: 237, f. 1 (f, T from Enguterothrix).

Micrargus georgescuae Millidge, 1976: 147, f. 12-13, 15-19 (Dmf).
Micrargus georgescuae Bauchhenss, 1988: 379, f. 1, 3 (f).
Micrargus georgescuae Heimer & Nentwig, 1991: 214, f. 577 (mf).
Micrargus georgescuae Rėlys & Weiss, 1997: 492, f. 3, 13, 17, 21 (m).
Micrargus georgescuae Wiśniewski, Rozwałka & Wesołowska, 2018: 152, f. 1-15, 21-24 (mf).

Neriene herbigradus Blackwall, 1854a: 179 (Dmf).
Neriene herbigradus Blackwall, 1864a: 285, pl. 19, f. 199 (mf).
Neriene exhilarans O. Pickard-Cambridge, 1879e: 199, pl. 12, f. 3 (Dmf).
Lophomma herbigrada Simon, 1884a: 537, f. 337-340 (mf, S of Erigone mordens, rejected by Millidge, 1976: 147, see Micrargus apertus).
Micrargus herbigradus Dahl, 1886: 79.
Lophomma herbigradum Chyzer & Kulczyński, 1894: 127, pl. 4, f. 50, pl. 5, f. 6 (mf).
Lophomma herbigrada Simon, 1894a: 659, f. 685 (m).
Lophomma herbigrada Becker, 1896: 101, pl. 10, f. 6 (mf).
Lophomma herbigradum Smith, 1901b: 10, p. 9: f. 2k (f).
Lophomma herbigrada Bösenberg, 1902: 183, pl. 16, f. 250 (mf).
Lophomma herbigrada Hull, 1911b: 48, pl. 2, f. 8-9 (mf).
Plexisma herbigrada Hull, 1920a: 10 (T from Lophomma).
Blaniargus herbigrada Simon, 1926: 438, 516, f. 774 (f, S of Porrhomma apertum, revalidated by Millidge, 1976: 147, see Micrargus apertus).
Micrargus herbigrada Denis, 1950b: 89, f. 14 (f).
Micrargus herbigradus Locket & Millidge, 1953: 283, f. 171E, 172A (mf).
Micrargus herbigradus Wiehle, 1960a: 262, f. 476-483 (mf).
Micrargus herbigradus Lehtinen & Kleemola, 1962: 111, f. 16 (f).
Micrargus herbigradus Merrett, 1963b: 436, f. 117A-C (m).
Micrargus herbigradus Georgescu, 1971: 237, f. 5-12 (mf, S of Micrargus canescens, rejected by Millidge, 1976: 147, see M. apertus).
Micrargus herbigradus carpaticus Georgescu, 1971: 235, f. 1-4 (Dmf) [urn:lsid:nmbe.ch:spidersp:062953].
Micrargus herbigradus Tystshenko, 1971: 260, f. 884 (f).
Micrargus herbigradus Miller, 1971: 274, pl. LVII, f. 29-31 (mf).
Micrargus herbigradus Palmgren, 1976: 79, f. 14.4-6, 33b.3-4, 7 (mf).
Micrargus herbigradus Millidge, 1976: 147, f. 1-2, 6, 7, 9 (mf, S of Micrargus herbigradus carpaticus).
Micrargus herbigradus Saito, Takahashi & Sagara, 1979: 11, f. 23, 26 (f).
Micrargus herbigradus Nellist, 1980: 39, f. 1, 4-7 (m).
Micrargus herbigradus Thaler, 1982c: 402, f. 5 (m).
Micrargus herbigradus Roberts, 1987: 80, f. 34d, 38g (mf).
Micrargus herbigradus Höfer, 1989: 186, pl. 5b (m).
Micrargus herbigradus Chikuni, 1989b: 57, f. 52 (mf).
Micrargus herbigradus Tanasevitch, 1990: 104, f. 22.38, 24.55 (mf).
Micrargus herbigradus Gao & Zhu, 1990: 154, f. 14-15 (m).
Micrargus herbigradus Heimer & Nentwig, 1991: 214, f. 578 (mf).
Micrargus herbigradus Wunderlich, 1995f: 533, f. 11 (m).
Micrargus herbigradus Rėlys & Weiss, 1997: 492, f. 4, 14, 18, 22 (m).
Micrargus herbigradus Song, Zhu & Chen, 1999: 187, f. 106E-F, I (mf).
Micrargus herbigradus Yoo et al., 2003: 2, f. 1-4 (mf).
Micrargus herbigradus Bosmans, 2007: 132, f. 103-108 (mf).
Micrargus herbigradus Ono, Matsuda & Saito, 2009: 288, f. 430-433 (mf).
Micrargus herbigradus Tanasevitch, 2011e: 34, f. 7-8 (m).
Micrargus herbigradus Wiśniewski, Rozwałka & Wesołowska, 2018: 152, f. 19-20, 28-30 (mf).

Micrargus hokkaidoensis Wunderlich, 1995f: 532, f. 2-4 (Dm).
Micrargus hokkaidoensis Ono, Matsuda & Saito, 2009: 288, f. 437-439 (m).

Walckenaera laudata O. Pickard-Cambridge, 1881a: 594 (Dmf).
Neriene laudata O. Pickard-Cambridge, 1882a: 7, pl. 1, f. 3 (mf).
Lophomma laudatum O. Pickard-Cambridge, 1906a: 50, pl. B, f. 9 (f).
Lophomma laudatum Smith, 1908b: 331, pl. 25, f. 6 (m).
Plexisma laudata Hull, 1920a: 10 (T from Lophomma).
Nothocyba laudata Simon, 1926: 438, 517.
Micrargus laudatus Denis, 1950b: 89, f. 16 (f).
Micrargus laudatus Locket & Millidge, 1953: 285, f. 171F, H, 172D (mf).
Nothocyba laudata Wiehle, 1963c: 227, f. 1-4 (mf).
Micrargus laudatus Millidge, 1977: 30, f. 103 (m).
Micrargus laudatus Roberts, 1987: 80, f. 35b, 38j (mf).
Micrargus laudatus Heimer & Nentwig, 1991: 214, f. 581 (mf).

Lophocarenum longitarsus Emerton, 1882: 48, pl. 13, f. 4 (Dm).
Erigone longitarsus Marx, 1890a: 534.
Lophomma longitarsus Simon, 1894a: 659.
Baryphyma longitarsum Crosby & Bishop, 1933b: 153, pl. 7, f. 177-180 (m).
Baryphyma longitarsum Kaston, 1948: 176, f. 495-498 (m).
Baryphyma longitarsum Levi, 1951: 8, f. 11-12 (Df).
Micrargus longitarsus Buckle et al., 2001: 132 (T from Baryphyma, following the suggestion by Millidge, 1977: 30).
Micrargus longitarsus Paquin & Dupérré, 2003: 115, f. 1183-1185 (mf).
Micrargus longitarsus Marusik, Gnelitsa & Koponen, 2008: 230 (T from Baryphyma confirmed).

Delorrhipis nibeoventris Kishida, in Komatsu, 1942b: 57, 62, f. 6 (Dmf).
Dellorrhipis nibeoventris Komatsu, 1961a: 26, f. 16A-E (mf).
Micrargus nibeoventris Wunderlich, 1995f: 531, f. 1 (m, T from Delorrhipis = Savignia).
Micrargus niveoventris Ono, Matsuda & Saito, 2009: 290, f. 444-447 (mf).

Metopobactrus pacificus Emerton, 1923: 238, f. 1 (Dm).
Micrargus aleuticus Holm, 1960b: 122, f. 5-8 (Dmf) [urn:lsid:nmbe.ch:spidersp:011776].
Micrargus pacificus Buckle et al., 2001: 132 (T from Metopobactrus, S of Micrargus aleuticus).

Micrargus parvus Wunderlich, 2011: 381, f. 30-36 (Dmf).

Blaniargus pervicax Denis, 1947e: 153, f. 8-9 (Df).
Micrargus pervicax Brignoli, 1983c: 346.
Micrargus pervicax Wunderlich, 2008e: 691, f. 22-27 (f, Dm).

Erigone subaequalis Westring, 1851: 42 (Dmf).
Walckenaera fortuita O. Pickard-Cambridge, 1871a: 452, pl. 57, f. 37 (Dmf).
Walckenaera subaequalis O. Pickard-Cambridge, 1881a: 501 (S of Walckenaeria fortuita).
Tapinocyba subaequalis Simon, 1884a: 786.
Lophomma laudatum Simon, 1884a: 539, f. 341-342 (mf; misidentified per Simon, 1926: 517).
Lophomma laudatum Becker, 1896: 102, pl. 10, f. 7 (mf).
Lophomma laudatum Kulczyński, 1898: 72, pl. 1, f. 26 (m; misidentified per Simon, 1926: 517).
Cnephalocotes fuscus O. Pickard-Cambridge, 1900a: 16, f. 5 (Dm).
Tapinocyba subaequalis Smith, 1901a: 303, p. 334: f. 1b, 2b (m).
Lophomma laudatum Bösenberg, 1902: 183, pl. 16, f. 251 (m).
Lophomma subaequale O. Pickard-Cambridge, 1906a: 50, pl. B, f. 10 (f).
Lophomma subaequale Smith, 1908b: 331, pl. 25, f. 5 (m).
Plexisma subaequalis Hull, 1920a: 10 (T from Lophomma).
Nothocyba subaequalis Simon, 1926: 440, 517, f. 779 (f, S of Cnephalocotes fuscus).
Blaniargus subaequalis Hull, 1933: 108.
Nothocyba subaequalis Miller, 1947: 67, pl. VII, f. 12-14 (mf).
Nothocyba subaequalis Jong, 1950: 215, f. 4 (m).
Micrargus subaequalis Denis, 1950b: 90, f. 15 (f).
Notocyba subaequalis Hackman, 1952b: 73, f. 4 (f).
Micrargus subaequalis Locket & Millidge, 1953: 283, f. 171G, 172B (mf).
Micrargus subaequalis Tullgren, 1955: 337, f. 42a-e (mf).
Micrargus subaequalis Buchar & Zdárek, 1960: 89, f. 1C (m).
Nothocyba subaequalis Wiehle, 1960a: 266, f. 484-490 (mf).
Micrargus subaequalis Merrett, 1963b: 437, f. 118A-C (m).
Micrargus subaequalis Tystshenko, 1971: 260, f. 885 (f).
Micrargus subaequalis Miller, 1971: 274, pl. LVIII, f. 1-2 (mf).
Micrargus subaequalis Waaler, 1971a: 20, f. 6-7 (mf).
Micrargus subaequalis Palmgren, 1976: 81, f. 14.7-10 (mf).
Micrargus subaequalis Millidge, 1977: 30 (suggested T to Grammonota).
Micrargus subaequalis Roberts, 1987: 80, f. 35a, 38i (mf).
Micrargus subaequalis Tanasevitch, 1990: 103, f. 22.37, 24.56 (mf).
Micrargus subaequalis Heimer & Nentwig, 1991: 214, f. 580 (mf).
Micrargus subaequalis Song, Zhu & Chen, 1999: 187, f. 106G-H, J (mf).
Micrargus subaequalis Hu, 2001: 547, f. 367.1-2 (f).
Micrargus subaequalis Song, Zhu & Chen, 2001: 139, f. 76A-D (mf).
Micrargus subaequalis Guryanova, 2003: 5, f. 9 (f).
Micrargus subaequalis Karabulut & Türkes, 2011: 120, f. 7-9 (mf).
Micrargus subaequalis Zhu & Zhang, 2011: 134, f. 85A-F (mf).