type Pirata marxi Stone, 1890; gender feminine

In synonymy:
Trebacosa brunhesi Villepoux, 2007 = Trebacosa europaea Szinetár & Kancsal, 2007 (Szűts et al., 2017: 387, ).
Trebacosa emertoni (Dahl, 1908, T from Pirata) = Trebacosa marxi (Stone, 1890) (Wallace & Exline, 1978: 4, 93, sub Pirata).

Trebacosa brunhesi Villepoux, 2007: 1, f. 1, 2A-F, 3 (Dmf; N.B.: editor's note on p. 7 indicates that this name may be a junior synonym of T. europaea) [urn:lsid:nmbe.ch:spidersp:041061].
Trebacosa europaea Szinetár & Kancsal, 2007: 155, f. 1, 3, 5, 7, 9, 11, 13 (Dm).
Trebacosa europaea Szűts et al., 2017: 387, f. 5-22, 24-29 (mf, S of T. brunhesi).

Pirata piraticus Emerton, 1885: 492, pl. 48, f. 7 (mf, misidentified).
Pirata marxi Stone, 1890: 429, pl. 15, f. 1 (Df).
Pirata piraticus Emerton, 1902: 84, f. 208-209 (mf, misidentified).
Pirata marxi Montgomery, 1902: 582, pl. 30, f. 47 (f).
Pirata marxi Montgomery, 1904: 309, pl. 19, f. 27 (f).
Pirata marxi Chamberlin, 1908: 307, pl. 21, f. 8, pl. 22, f. 8 (f, Dm).
Pirata emertoni Dahl, 1908: 526 (Dmf).
Pirata marxi Comstock, 1912: 644, f. 724d.
Pirata marxi Kaston, 1938a: 16, f. 5 (f).
Pirata marxi Comstock, 1940: 655, f. 724d (f).
Pirata marxi Kaston, 1948: 309, f. 985-986, 1006 (mf).
Piratessa marxi Roewer, 1955c: 287 (in generic nomen nudum).
Pirata marxi Wallace & Exline, 1978: 93, f. 199-203 (mf, T from Piratessa = Piratosa, S of Pirata emertoni).
Trebacosa marxi Dondale & Redner, 1981b: 109, f. 1-4 (Tmf from Pirata).
Trebacosa marxi Dondale & Redner, 1990: 241, f. 362-365 (mf).
Trebacosa marxi Paquin & Dupérré, 2003: 170, f. 1919-1922 (mf).
Trebacosa marxi Szinetár & Kancsal, 2007: 155, f. 2, 4, 6, 8, 10, 12, 14 (m).
Trebacosa marxi Villepoux, 2007: 4, f. 3 (mf).
Trebacosa marxi Szűts et al., 2017: 386, f. 1-4, 23 (mf).