In synonymy:
Heteromma Karsch, 1880 = Tomopisthes Simon, 1884 (Ramírez, 2003: 193, automatically with its replacement name Heterommides)
Heterommides Strand, 1912 (removed from the S of Gayenna) = Tomopisthes Simon, 1884 (Ramírez, 2003: 193)

type Tomopisthes immanis Simon, 1884; gender masculine; syn. of Tomopisthes horrendus (Nicolet, 1849)

N.B.: removed from the synonym of Gayenna Nicolet, 1849 (contra Tullgren, 1901b: 230) and considered a senior synonym of Heterommides Strand, 1912c [urn:lsid:nmbe.ch:spidergen:04182] (replacement name for Heteromma Karsch, 1880c [urn:lsid:nmbe.ch:spidergen:04711] (type H. fuegiana), preoccupied in fossil Araneae by Menge, 1856, by Ramírez, 2003: 193.

Transferred to other genera:
Tomopisthes acupictus (Nicolet, 1849) -- see Acanthoceto
Tomopisthes backhauseni Simon, 1895 -- see Sanogasta
Tomopisthes backhauseni patagonicus Simon, 1905 -- see Sanogasta
Tomopisthes chazaliae Simon, 1897 -- see Josa
Tomopisthes conspersus Simon, 1902 -- see Sanogasta
Tomopisthes frenatus Mello-Leitão, 1947 -- see Tasata
Tomopisthes injucundus Simon, 1902 -- see Sanogasta
Tomopisthes kraepelini Simon, 1902 -- see Sanogasta
Tomopisthes lebruni Simon, 1886 -- see Negayan
Tomopisthes magellanicus Simon, 1887 -- see Negayan
Tomopisthes modestus Simon, 1902 -- see Sanogasta
Tomopisthes septentrionalis Berland, 1913 -- see Acanthoceto
Tomopisthes strigosus (Tullgren, 1901) -- see Negayan
Tomopisthes taeniatus Simon, 1886 -- see Sanogasta
Tomopisthes tripunctatus Mello-Leitão, 1945 -- see Arachosia
Tomopisthes vittatus Simon, 1884 -- see Monapia

In synonymy:
Tomopisthes argentinus (Mello-Leitão, 1940, T from Nonianus) = Tomopisthes horrendus (Nicolet, 1849) (Ramírez, 2003: 193).
Tomopisthes chilensis (Tullgren, 1902, T from Gayenna) = Tomopisthes pusillus (Nicolet, 1849) (Ramírez, 2003: 206).
Tomopisthes fuegianus (Karsch, 1880, T from Gayenna) = Tomopisthes horrendus (Nicolet, 1849) (Ramírez, 2003: 193).
Tomopisthes immanis Simon, 1884 = Tomopisthes horrendus (Nicolet, 1849) (Ramírez, 2003: 193).
Tomopisthes sica (Strand, 1908, T from Philisca) = Tomopisthes horrendus (Nicolet, 1849) (Ramírez, 2003: 193).

Nomina dubia:
Tomopisthes aethiops Simon, 1903i: 312, f, Argentina) -- Ramírez, 2003: 193.
Tomopisthes limbatus (Nicolet, 1849: 422, mf, Chile, originally in Clubiona) -- Ramírez, 2003: 44.
Tomopisthes nubes (Nicolet, 1849: 421, f, Chile, originally in Clubiona) -- Ramírez, 2003: 44.
Tomopisthes versicolor (Nicolet, 1849: 427, mf, Chile, originally in Clubiona) -- Ramírez, 2003: 44.

Clubiona horrenda Nicolet, 1849: 421 (Df).
Amaurobius horrenda Simon, 1864: 139.
Heteromma fuëgiana Karsch, 1880c: 380, pl. 12, f. 9 (Dj) [urn:lsid:nmbe.ch:spidersp:023818].
Tomopisthes immanis Simon, 1884l: 133 (Df) [urn:lsid:nmbe.ch:spidersp:024070].
Tomopisthes horrendus Simon, 1887h: E4.
Tomopisthes immanis Simon, 1887h: E28, pl. 1, f. 2 (f, Dm).
Gayenna immanis Tullgren, 1901b: 232, pl. 18, f. 1 (f).
Gayenna immanis Tullgren, 1902: 58, pl. 6, f. 1 (mf).
Tomopisthes horrendus Simon, 1902h: 30 (Dm).
Philisca sica Strand, 1908d: 5 (Df; N.B.: type locality in Ghana presumably an error) [urn:lsid:nmbe.ch:spidersp:023998].
Heterommides fuegianus Strand, 1912c: 16 (generic replacement name for Heteromma Karsch, 1880).
Nonianus argentinus Mello-Leitão, 1940b: 42, f. 40-41 (Df) [urn:lsid:nmbe.ch:spidersp:029110].
Tomopisthes horrendus Ramírez, 2003: 193, f. 104A, 105A-B, 106A-B, 107A-G (mf, S of Heterommides fuegianus, Nonianus argentinus, Philisca sica and Tomopisthes immanis).

Philisca puconensis Ramírez, 2003: 191, f. 103A-E (Dmf).
Philisca puconensis Soto & Ramírez, 2012: 30, f. 17a-c (f).
Tomopisthes puconensis Labarque et al., 2015: 559 (Tmf from Philisca).

Clubiona pusilla Nicolet, 1849: 426 (Df).
Gayenna chilensis Tullgren, 1902: 63, pl. 6, f. 3 (Df) [urn:lsid:nmbe.ch:spidersp:023810].
Tomopisthes pusillus Ramírez, 2003: 206, f. 109, 110A-F, 111A, 112C (Dm, f, T from Clubiona, S of Gayenna chilensis).

Tomopisthes tullgreni Simon, 1905e: 13 (Df).

Tomopisthes varius Simon, 1884l: 134, pl. 3, f. 17-18 (Dmf).
Tomopisthes varius Simon, 1887h: E30, pl. 1, f. 5 (mf).
Gayenna varia Tullgren, 1901b: 233.
Gayenna varia Tullgren, 1902: 59, pl. 6, f. 2 (mf).
Tomopisthes varius Simon, 1904e: 102.
Tomopisthes varius Ramírez, 2003: 202, f. 104B, 105C-D, 108A-F (mf).