In synonymy:
Sostogeus Chamberlin & Gertsch, 1940 = Sosticus Chamberlin, 1922 (Platnick & Shadab, 1976b: 9)

type Prosthesima insularis Banks, 1895; gender masculine

N.B.: considered a senior synonym of Sostogeus Chamberlin & Gertsch, 1940: 1 [urn:lsid:nmbe.ch:spidergen:05695] (type S. zygethus Chamberlin & Gertsch, 1940 = Sosticus loricatus (L. Koch, 1866)) by Platnick & Shadab, 1976b: 9.

Transferred to other genera:
Sosticus dherikanalensis Gajbe, 1979 -- see Sphingius
Sosticus jabalpurensis Bhandari & Gajbe, 2001 -- see Sphingius
Sosticus nainitalensis Gajbe, 1979 -- see Sphingius
Sosticus pawani Gajbe, 1993 -- see Xizangiana
Sosticus poonaensis Tikader, 1982 -- see Sphingius
Sosticus solanensis Gajbe, 1979 -- see Sphingius
Sosticus sundargarhensis Gajbe, 1979 -- see Sphingius

In synonymy:
Sosticus continentalis Chamberlin, 1922 = Sosticus insularis (Banks, 1895) (Ubick & Roth, 1973a: 7).
Sosticus corcyraeus (Simon, 1885, T from Drassus) = Sosticus loricatus (L. Koch, 1866) (Simon, 1914: 211, sub Scotophaeus).
Sosticus loricatus longipes (Kroneberg, 1875, T from Drassus) = Sosticus loricatus (L. Koch, 1866) (Bonnet, 1958: 3968, sub Scotophaeus).
Sosticus navaricus (Simon, 1878, T from Drassus) = Sosticus loricatus (L. Koch, 1866) (Simon, 1914: 211, sub Scotophaeus).
Sosticus projectus Fox, 1938 = Sosticus insularis (Banks, 1895) (Ubick & Roth, 1973a: 7).
Sosticus rufus (Denis, 1958, T from Gnaphosa) = Sosticus loricatus (L. Koch, 1866) (Ovtsharenko, Platnick & Song, 1992: 4).
Sosticus zygethus (Chamberlin & Gertsch, 1940) = Sosticus loricatus (L. Koch, 1866) (Ubick & Roth, 1973a: 7, sub Sostogeus).

Sosticus californicus Platnick & Shadab, 1976b: 12, f. 27-30 (Dmf).

Prosthesima insularis Banks, 1895d: 78 (Df).
Herpyllus insularis Banks, 1910: 8.
Sosticus insularis Chamberlin, 1922: 160.
Sosticus continentalis Chamberlin, 1922: 160 (Df) [urn:lsid:nmbe.ch:spidersp:060577].
Sosticus projectus Fox, 1938a: 236, pl. 1, f. 3, 5 (Dmf) [urn:lsid:nmbe.ch:spidersp:060578].
Sosticus insularis Kaston, 1948: 364, f. 1266-1268 (mf).
Sosticus insularis Ubick & Roth, 1973a: 7 (S of Sosticus continentalis and S. projectus).
Sosticus insularis Platnick & Shadab, 1976b: 11, f. 19-26 (mf).
Sosticus insularis Heiss & Allen, 1986: 53, f. 87-88 (mf).
Sosticus insularis Platnick & Dondale, 1992: 199, f. 297-300 (mf).
Sosticus insularis Paquin & Dupérré, 2003: 81, f. 718-720 (mf).
Sosticus insularis Murphy, 2007: 50, f. 376-377 (mf).
Sosticus insularis Azevedo, Griswold & Santos, 2018a: 678, f. 1B, 9B (mf).
Sosticus insularis Azevedo, Griswold & Santos, 2018b: 609, f. 23d, S6h (m).

Drassus loricatus L. Koch, 1866: 131, pl. 5, f. 82-84 (Dmf).
Drassus loricatus longipes Kroneberg, 1875: 20 (Dmf) [urn:lsid:nmbe.ch:spidersp:060681].
Drassus navaricus Simon, 1878f: 159 (Df) [urn:lsid:nmbe.ch:spidersp:060682].
Drassus corcyraeus Simon, 1885c: 340 (Df) [urn:lsid:nmbe.ch:spidersp:060683].
Scotophaeus loricatus Simon, 1893a: 371 (T from Drassus).
Drassus loricatus Chyzer & Kulczyński, 1897: 215, pl. 8, f. 36, 52 (mf).
Drassus loricatus Bösenberg, 1902: 301, pl. 28, f. 445 (f).
Scotophaeus loricatus Strand, 1907k: 119 (m).
Scotophaeus loricatus Simon, 1914: 145, 211, f. 258 (f, S of Drassus corcyraeus and D. navaricus; S of D. c. with ?, accepted by Roewer, 1955c: 434, but not by Bonnet, 1958: 3968).
Scotophaeus loricatus Reimoser, 1937a: 21, f. 47-48 (mf).
Sostogeus zygethus Chamberlin & Gertsch, 1940: 1, f. 1-4 (Dmf) [urn:lsid:nmbe.ch:spidersp:060580].
Scotophaeus loricatus Palmgren, 1943: 98, f.
Scotophaeus loricatus Levi & Field, 1954: 458, f. 71, 77 (mf).
Scotophaeus loricatus Bonnet, 1958: 3968 (S of Drassus loricatus longipes; accepted by Platnick & Shadab, 1976b: 13 and Mikhailov, 1997c: 181).
Gnaphosa rufa Denis, 1958b: 95, f. 21 (Df) [urn:lsid:nmbe.ch:spidersp:060579].
Scotophaeus loricatus Miller, 1971: 94, pl. VI, f. 20-21 (mf).
Sostogeus loricatus Ubick & Roth, 1973a: 7 (T from Scotophaeus, S of Sostogeus zygethus).
Sosticus loricatus Platnick & Shadab, 1976b: 13, f. 31-38 (mf).
Sostogeus loricatus Kaston, 1977: 45, f. 36, 40-41 (mf).
Sosticus loricatus Grimm, 1985: 183, f. 213-216 (mf).
Sosticus loricatus Hu & Wu, 1989: 281, f. 227.1-4 (mf).
Sosticus loricatus Heimer & Nentwig, 1991: 440, f. 1157 (mf).
Sosticus loricatus Platnick & Dondale, 1992: 201, f. 301-304 (mf).
Sosticus loricatus Ovtsharenko, Platnick & Song, 1992: 4 (S of Gnaphosa rufa).
Sosticus loricatus Tuneva & Esyunin, 2002: 222, f. 25-29 (mf).
Sosticus loricatus Paquin & Dupérré, 2003: 81, f. 721-723 (mf).
Sosticus loricatus Song, Zhu & Zhang, 2004: 226, f. 133A-E (mf).
Sosticus loricatus Trotta, 2005: 165, f. 278-279 (mf).
Sosticus loricatus Namaghi et al., 2016: 19, f. 1c, 2e-f (f).

Sosticus montanus Zamani et al., 2021a: 101, f. 21A-I (Df).