In synonymy:
Ashantia Strand, 1908 = Phrixotrichus Simon, 1889 (Perafán & Pérez-Miles, 2014b: 2408)
Orthothrichus Karsch, 1880 = Phrixotrichus Simon, 1889 (Simon, 1889a: 222, preoccupied, replacement name)

type Orthothrichus vulpinus Karsch, 1880; gender masculine

N.B.: replacement name for Orthothrichus Karsch, 1880c: 390 [urn:lsid:nmbe.ch:spidergen:05093], preoccupied in Coleoptera by Peyron, 1856; not a junior synonym of Euathlus Ausserer, 1875 (Perafán & Pérez-Miles, 2014b: 2408, Pérez-Miles et al., 1996: 54, contra Schmidt, 1996a: 14); considered a senior synonym of Ashantia Strand, 1908b: 759 [urn:lsid:nmbe.ch:spidergen:05090] (type A. latithorax Strand, 1908 = Phrixotrichus vulpinus (Karsch, 1880)) by Perafán & Pérez-Miles, 2014b: 2408, contra Gallon, 2005d: 199, who considered it a junior synonym of Euathlus Ausserer, 1875.

In synonymy:
Phrixotrichus chilensis (Molina, 1810) = Phrixotrichus scrofa (Molina, 1782) (Schmidt, 1996a: 17, sub Paraphysa).
Phrixotrichus latithorax (Strand, 1908, T from Euathlus) = Phrixotrichus vulpinus (Karsch, 1880) (Perafán & Pérez-Miles, 2010: 49).

Nomen dubium:
Phrixotrichus vulpinus ater Donoso, 1957: 9 (f, Chile) -- Aguilera, Montenegro & Casanueva, 2022: 66.

Phrixotrichus jara Perafán & Pérez-Miles, 2014b: 2410, f. 9A-E (Dm).

Phrixotrichus pucara Ferretti, 2015b: 253, f. 1-7 (Dm).

Aranea scrofa Molina, 1782: 215 (D).
Aranea scrofa Molina, 1788: 236 (D).
Mygale chilensis Molina, 1810: 185 (D) [urn:lsid:nmbe.ch:spidersp:061119].
Mygale rosea C. L. Koch, 1842: vol. 9: 59, pl. 308, f. 728 (m, misidentified).
Mygale chilensis Nicolet, 1849: 332, pl. 1, f. 2 (Df).
Phrixotrichus chilensis Simon, 1896e: 63.
Phrixotrichus auratus Pocock, 1903b: 104 (Dmf).
Phrixotrichus scrofa Porter, 1930: 162 (T from Aranea = Araneus).
Phrixotrichus scrofa Schiapelli & Gerschman, 1963: 105, f. 1, 3, 5, 7, 9-10 (mf).
Phrixotrichus scrofa Legendre & Calderón, 1984: 1034, pl. VI, f. 1-10 (m).
Phrixotrichus roseus Schmidt, 1992e: 9, f. 1 (f, misidentified).
Paraphysa scrofa Pérez-Miles et al., 1996: 54 (T from Phrixotrichus).
Paraphysa scrofa Schmidt, 1996a: 17 (S of Phrixotrichus chilensis, removed from S of Phrixotrichus roseus).
Paraphysa scrofa Schmidt, 1997g: 16, f. 69-70, 72 (mf; f. 71 see Thrixopelma pruriens).
Paraphysa scrofa Schmidt, 1998i: 4, f. 1 (f).
Phrixotrichus scrofa Vol, 1999a: 12, f. T (f).
Paraphysa scrofa Schmidt, 1999f: 8, f. 15-16 (m).
Paraphysa scrofa Peters, 2003: 260, f. 1047, 1050-1051 (mf).
Phrixotrichus scrofa Perafán & Pérez-Miles, 2014b: 2411, f. 10A-D (mf, T from Paraphysa = Euathlus).
Phrixotrichus scrofa Sherwood, Gabriel & Longhorn, 2019: 71 (Phrixotrichus chilensis is probably not a S of P. scrofa).
Phrixotrichus scrofa Montenegro & Aguilera, 2024a: 344, f. 1b-c, 2g, 3g, 4e, 12a-b, 13d-e (mf).

Orthothrichus vulpinus Karsch, 1880c: 390 (Dmf).
Ashantia latithorax Strand, 1908b: 770 (Df) [urn:lsid:nmbe.ch:spidersp:002076].
Euathlus vulpinus Schmidt, 1996a: 14 (removed from S of E. roseus).
Euathlus vulpinus Schmidt, 1996b: 67, unnnumbered f. (mf).
Euathlus vulpinus Schmidt, 1998b: 10, f. 1 (m).
Euathlus vulpinus Peters, 2003: 175, f. 696 (m).
Euathlus vulpinus Schmidt, 2003l: 163, f. 355-358 (mf).
Euathlus vulpinus Gallon, 2005d: 199, f. 5 (f).
Euathlus latithorax Gallon, 2005d: 199, f. 1-4 (f).
Euathlus vulpinus Perafán & Pérez-Miles, 2010: 49, f. 1-2 (f, S of Euathlus latithorax).
Phrixotrichus vulpinus Perafán & Pérez-Miles, 2014b: 2412, f. 10E (f, T from Euathlus).
Phrixotrichus vulpinus Kaderka, 2015: 285, f. 32-33 (m).
Phrixotrichus vulpinus Ferretti, 2015b: 254, f. 8-10 (mf).
Phrixotrichus vulpinus Montenegro & Aguilera, 2024a: 344, f. 2h, 3h, 4f, 12c-d, 13a (mf).