In synonymy:
Agassa Simon, 1901 = Sassacus G. W. Peckham & E. G. Peckham, 1895 (Richman, 2008: 27)
Ramboia Mello-Leitão, 1943 = Sassacus G. W. Peckham & E. G. Peckham, 1895 (Bauab-Vianna & Soares, 1982: 89)

type Sassacus papenhoei G. W. Peckham & E. G. Peckham, 1895; gender masculine

N.B.: considered a senior synonym of Ramboia Mello-Leitão, 1943a: 229 [urn:lsid:nmbe.ch:spidergen:05507] (type R. helenica Mello-Leitão, 1943) by Bauab & Soares, 1982: 89 and of Agassa Simon, 1901a: 643 [urn:lsid:nmbe.ch:spidergen:02799] (type A. georgiana Simon, 1901 = Sassacus cyaneus (Hentz, 1846)) by Richman, 2008: 27.

Transferred to other genera:
Sassacus aemulus Gertsch, 1934 -- see Bianor
Sassacus poecilopus Caporiacco, 1947 -- see Parnaenus

In synonymy:
Sassacus felix Bauab-Vianna & Soares, 1978 = Sassacus helenicus (Mello-Leitão, 1943) (Bauab-Vianna & Soares, 1982: 89).
Sassacus lecontei (Barrows, 1940, T from Pseudicius) = Sassacus papenhoei G. W. Peckham & E. G. Peckham, 1895 (Kaston, 1972b: 105).
Sassacus mathetes (Chamberlin, 1925, T from Metaphidippus) = Sassacus vitis (Cockerell, 1894) (Richman, 2008: 36).
Sassacus melanomerus (Chamberlin, 1924, T from Dendryphantes) = Sassacus vitis (Cockerell, 1894) (Richman, 2008: 36).
Sassacus smaragdinus Barrows, 1919 = Sassacus papenhoei G. W. Peckham & E. G. Peckham, 1895 (Richman & Cutler, 1978: 99).
Sassacus uteanus Chamberlin & Gertsch, 1929 = Sassacus papenhoei G. W. Peckham & E. G. Peckham, 1895 (Richman & Cutler, 1978: 99).
Sassacus vanduzeei Chamberlin, 1924 = Sassacus papenhoei G. W. Peckham & E. G. Peckham, 1895 (Richman, 2008: 28).

Nomina dubia:
Sassacus ceruleus (Walckenaer, 1837: 448, f, USA, originally in Attus) -- Richman, 1978: 58, confirmed by Richman, 2008: 33.
Sassacus marginellus Simon, 1902d: 30 (f, Brazil) -- Galiano, 1963a: 436.
Sassacus quaternus (Walckenaer, 1837: 452, mf, USA, originally in Attus) -- Richman, 2008: 33.

Nomen nudum:
Sassacus bicinctus Simon, 1901a: 626 (Brazil) [urn:lsid:nmbe.ch:spidersp:054586] -- no description, nomen nudum.

Homalattoides alboguttatus F. O. Pickard-Cambridge, 1901a: 294, pl. 28, f. 13 (Dm).
Sassacus alboguttatus Simon, 1903a: 838.
Sassacus alboguttatus Richman, 2008: 35, f. 23-28 (m, Df).

Sassacus arcuatus Simon, 1901a: 626 (no description, nomen nudum).
Sassacus arcuatus Simon, 1902d: 28 (Dm).
Sassacus arcuatus Galiano, 1963a: 433, pl. 35, f. 11-13 (m).

Sassacus aurantiacus Simon, 1901a: 626 (no description, nomen nudum).
Sassacus aurantiacus Simon, 1902d: 29 (Df).
Sassacus aurantiacus Galiano, 1963a: 434, pl. 34, f. 13 (f).

Sassacus aztecus Richman, 2008: 39, f. 36-41 (Dmf).

Eris barbipes Peckham & Peckham, 1888: 55, pl. 4, f. 38 (Df).
Ashtabula nigricans F. O. Pickard-Cambridge, 1901a: 257, pl. 23, f. 2 (Dmf).
Eris barbipes F. O. Pickard-Cambridge, 1901a: 300, pl. 29, f. 11 (f).
Sassacus barbipes Peckham & Peckham, 1909: 592, pl. 50, f. 6 (mf, T from Eris, S of Ashtabula nigricans).
Sassacus barbipes Richman, 2008: 41, f. 42-48 (mf).

Sassacus biaccentuatus Simon, 1901a: 626 (no description, nomen nudum).
Sassacus biaccentuatus Simon, 1902d: 29 (Df).
Sassacus biaccentuatus Galiano, 1963a: 434, pl. 35, f. 9-10 (f).

Attus cyaneus Hentz, 1846: 365, pl. 22, f. 13 (Df).
Maevia chrysea C. L. Koch, 1846: 83, f. 1337 (Df).
Homalattus septentrionalis Keyserling, 1885: 515, pl. 13, f. 19 (Df).
Homalattus cyaneus Peckham & Peckham, 1888: 86, pl. 1, f. 64, pl. 6, f. 64 (f, Dm).
Rhene cyanea Peckham & Peckham, 1895: 161, pl. 15, f. 3 (f).
Agassa georgiana Simon, 1901a: 643, f. 752 (no description, nomen nudum).
Homalattus cyanea Emerton, 1909: 232, pl. 11, f. 9 (f).
Agassa cyanea Peckham & Peckham, 1909: 590, pl. 49, f. 12, pl. 51, f. 9 (mf, S of Agassa georgiana, Homalattus septentrionalis and Maevia chrysea [with ?]).
Agassa cerulea Chamberlin & Ivie, 1944: 189 (here per Richman, 2008: 33).
Agassa cyanea Kaston, 1948: 471, f. 1721-1722 (mf).
Agassa cyanea Breene et al., 1993: 67, f. 46A-C (mf).
Sassacus cyaneus Richman, 2008: 33, f. 17-22 (mf).

Sassacus dissimilis Mello-Leitão, 1941d: 186, f. 79 (Dmf).

Sassacus flavicinctus Crane, 1949: 41, f. 5 (Dmf).

Sassacus glyphochela Bauab-Vianna, 1979b: 193, f. 1-7 (Dm).

Ramboia helenica Mello-Leitão, 1943a: 230, f. 56 (Df).
Sassacus felix Bauab-Vianna & Soares, 1978c: 27, f. 1-7 (Dm) [urn:lsid:nmbe.ch:spidersp:054582].
Sassacus helenicus Bauab-Vianna & Soares, 1982: 89, f. 8-11 (m, S of Sassacus felix).

Cerionesta leucomystax Caporiacco, 1947a: 34 (Dm).
Cerionesta leucomystax Caporiacco, 1948a: 730, f. 164 (m).
Sassacus leucomystax Ruiz & Brescovit, 2008c: 490, f. 16-17 (m, T from Cerionesta).

Sassacus lirios Richman, 2008: 41, f. 49-54 (Dmf).

Sassacus ocellatus Crane, 1949: 44, f. 6 (Dmf).

Metaphidippus paiutus Gertsch, 1934d: 18, f. 22 (Dm).
Metaphidippus paiutus Prószyński, 1971e: 434 (T from Dendryphantes per Roewer).
Sassacus paiutus Maddison, 1996: 238 (T from Metaphidippus).
Sassacus paiutus Richman, 2008: 31, f. 9-14 (m, Df).

Sassacus papenhoei Peckham & Peckham, 1895: 177, pl. 16, f. 11 (Dmf).
Sassacus papenhoei Peckham & Peckham, 1909: 592, pl, 49, f. 11 (mf).
Sassacus smaragdinus Barrows, 1919b: 359, pl. 15, f. 9 (Df) [urn:lsid:nmbe.ch:spidersp:054584].
Sassacus vanduzeei Chamberlin, 1924b: 687, f. 133 (Df) [urn:lsid:nmbe.ch:spidersp:036093].
Sassacus uteanus Chamberlin & Gertsch, 1929: 111, pl. 5, f. 54, 56 (Dmf) [urn:lsid:nmbe.ch:spidersp:054585].
Pseudicius lecontei Barrows, 1940: 138, f. 12, 12B-C (Dm) [urn:lsid:nmbe.ch:spidersp:054583].
Sassacus papenhoei Levi & Field, 1954: 464, f. 97, 99, 102 (mf).
Sassacus papenhoei Kaston, 1972b: 105 (S of Pseudicius lecontei).
Sassacus papenhoei Richman & Cutler, 1978: 99 (S of Sassacus smaragdinus and S. uteanus).
Sassacus papenhoei Cutler, 1981b: 208, f. 5.
Sassacus papenhoei Breene et al., 1993: 68, f. 49A-C (mf).
Sassacus papenhoei Maddison, 1996: 332, f. 45, 69 (mf).
Sassacus papenhoei Richman, 2008: 28, f. 1-8 (mf).
Sassacus papenhoei Prószyński, 2017b: 94, f. 41S, 42V (m).

Sassacus resplendens Simon, 1901a: 626 (no description, nomen nudum).
Sassacus resplendens Simon, 1902d: 30 (Dm).
Sassacus resplendens Galiano, 1963a: 436, pl. 35, f. 17-19 (m).

Sassacus samalayucae Richman, 2008: 33, f. 15-16 (Df).

Scopocira sexspinosa Caporiacco, 1955: 426, f. 69a-c (Dm).
Sassacus sexspinosus Ruiz & Brescovit, 2005b: 757, f. 17-19 (m, T from Scopocira).

Sassacus trochilus Simon, 1901a: 626 (no description, nomen nudum).
Sassacus trochilus Simon, 1902d: 29 (Dm).
Sassacus trochilus Galiano, 1963a: 437, pl. 35, f. 14-16 (m).

Dendryphantes vitis Cockerell, 1894b: 207 (D).
Icius vitis Peckham & Peckham, 1909: 501, pl. 40, f. 11, pl. 41, f. 7 (Dmf).
Dendryphantes melanomerus Chamberlin, 1924b: 684, f. 125-126 (Dm) [urn:lsid:nmbe.ch:spidersp:033101].
Dendryphantes apachecus Chamberlin, 1925c: 136, f. 55-56 (Dm).
Dendryphantes mathetes Chamberlin, 1925c: 138, f. 59-60 (Dm) [urn:lsid:nmbe.ch:spidersp:034648].
Metaphidippus vitis Gertsch, 1934d: 19.
Metaphidippus vitis Prószyński, 1971e: 434 (T from Dendryphantes).
Metaphidippus mathetes Richman & Cutler, 1978: 90 (T from Dendryphantes).
Sassacus vitis Hill, 1979: 215 (T from Metaphidippus).
Metaphidippus vitis Maddison, 1996: 237, f. 27, 59 (m; may belong to Ramboia).
Dendryphantes melanomerus Jiménez, 2007c: 64, f. 1-7 (m, Df).
Sassacus vitis Richman, 2008: 35, f. 29-35 (mf, S of Dendryphantes melanomerus and Metaphidippus mathetes).