In synonymy:
Agelista Simon, 1900 = Titanattus G. W. Peckham & E. G. Peckham, 1885 (Bustamante & Ruiz, 2017: 335)

type Titanattus saevus G. W. Peckham & E. G. Peckham, 1885; gender masculine

N.B.: considered a senior synonymy of Agelista Simon, 1900b: 383 [urn:lsid:nmbe.ch:spidergen:02800] (type A. andina Simon, 1900) by Bustamante & Ruiz, 2017: 335.

In synonymy:
Titanattus acanjuba Bustamante & Ruiz, 2017 = Titanattus parvus (Mello-Leitão, 1945) (Rubio, 2021: 2).
Titanattus hirsutus (Mello-Leitão, 1941) = Titanattus andinus (Simon, 1900) (Galiano, 1963d: 29, sub Agelista).
Titanattus modestus (Simon, 1901) = Titanattus andinus (Simon, 1900) (Galiano, 1963d: 29, sub Agelista).
Titanattus obscurus (Mello-Leitão, 1943, T from Scopocira) = Titanattus andinus (Simon, 1900) (Galiano, 1963d: 29, sub Agelista).
Titanattus schubarti (Soares & Camargo, 1948) = Titanattus andinus (Simon, 1900) (Galiano, 1963d: 29, sub Agelista).

Nomen dubium:
Titanattus juduliani Simon, 1900b: 382 (f, Argentina) -- Galiano, 1963a: 460.

Agelista andina Simon, 1900b: 383 (Dm).
Agelista andina Simon, 1901a: 439, f. 489 (m).
Agelista modesta Simon, 1901a: 436 (no description, nomen nudum) [urn:lsid:nmbe.ch:spidersp:055226].
Agelista hirsuta Mello-Leitão, 1941d: 179, f. 71, pl. 11, f. 49 (Dmf) [urn:lsid:nmbe.ch:spidersp:055227].
Scopocira obscura Mello-Leitão, 1943a: 230, f. 57 (Df) [urn:lsid:nmbe.ch:spidersp:055228].
Agelista schubarti Soares & Camargo, 1948a: 398, f. 72-73 (Dm) [urn:lsid:nmbe.ch:spidersp:055229].
Agelista andina Galiano, 1963a: 283, pl. III, f. 4-6 (m).
Agelista andina Galiano, 1963d: 29, pl. I, f. 1-10 (mf, S of Agelista hirsuta, A. modesta, A. schubarti and Scopocira obscura).
Titanattus andinus Bustamante & Ruiz, 2017: 338, f. 27A-B (m, T from Agelista).
Agelista andina Prószyński, 2017b: 61, f. 27Z, 28A (mf).
Titanattus andinus Rubio, Baigorria & Stolar, 2021b: 1073, f. 1-2, 22-24 (mf).

Titanattus cordia Edwards & Baert, 2018: 9, f. 4A-J, 5A-C (Dmf).

Titanattus cretatus Chickering, 1946: 383, f. 337-340 (Df).
Titanattus cretatus Bedoya-Róqueme & Lopez-Villada, 2020b: 5, f. 8-11 (f).

Titanattus euryphaessa Bustamante & Ruiz, 2017: 341, f. 8L, 30A-G (Dm).

Agelista notabilis Mello-Leitão, 1943a: 221, f. 47 (Df).
Titanattus notabilis Galiano, 1963d: 32, pl. I, f. 11, pl. II, f. 1-3 (Dm, f, T from Agelista).
Titanattus notabilis Rubio, Baigorria & Stolar, 2021b: 1075, f. 5-6, 28-30 (mf).

Titanattus novarai Caporiacco, 1955: 424, f. 68 (Dm).
Titanattus novarai Ruiz & Brescovit, 2005b: 759, f. 20-22 (m).

Titanattus paganus Chickering, 1946: 385, f. 341-342 (Df).

Titanattus pallidus Mello-Leitão, 1943b: 265 (Dm).
Titanattus pallidus Edwards, Rinaldi & Ruiz, 2005: 20, f. 1-3, 44-46 (m).

Nebridia parva Mello-Leitão, 1945b: 289, f. 79 (Df).
Amphidraus parvus Zhang & Maddison, 2015: 22 (T from Nebridia).
Titanattus parvus Salgado & Ruiz, 2017: 430, f. 27E (f, T from Amphidraus).
Titanattus acanjuba Bustamante & Ruiz, 2017: 339, f. 4A-D, 6A-D, 7A-D, 8K, 9A, 28A-F, 29A-E (Dmf) [urn:lsid:nmbe.ch:spidersp:049810].
Titanattus parvus Rubio, 2021: 2, f. 2-16 (mf, S of Titanattus acanjuba).
Titanattus parvus Rubio, Baigorria & Stolar, 2021b: 1074, f. 3-4, 25-27 (mf).

Titanattus pegaseus Simon, 1900b: 382 (Dm).
Titanattus pegaseus Simon, 1901a: 431, f. 488 (m).
Titanattus pegaseus Galiano, 1963a: 460, pl. XXXVII, f. 16-17 (m).
Titanattus pegaseus Prószyński, 2017b: 61, f. 27H (m).

Titanattus saevus Peckham & Peckham, 1885b: 63, pl. 2, f. 1 (Dm).
Titanattus saevus F. O. Pickard-Cambridge, 1900: 191, pl. 15, f. 1 (m).
Titanattus saevus Simon, 1901a: 438, f. 487 (m).
Titanattus saevus Bustamante & Ruiz, 2017: 337, f. 27C-D (m).
Titanattus saevus Prószyński, 2017b: 61, f. 27G (m).

Titanattus sciosciae Rubio, Baigorria & Stolar, 2021b: 1072, f. 7-21 (Dmf).