| 2021-07-05 | Species distribution update | Saitis variegatus Mello-Leitão, 1941 | Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Maeota dorsalis Zhang & Maddison, 2012 | Brazil, Paraguay | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Maeota dichrura Simon, 1901 | Brazil, Paraguay | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Corythalia conferta Bayer, Höfer & Metzner, 2020 | Brazil, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Corythalia conferta Bayer, Höfer & Metzner, 2020 | Brazil, Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Rudra humilis Mello-Leitão, 1945 | Brazil, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Rudra humilis Mello-Leitão, 1945 | Brazil, Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Metaphidippus perfectus (G. W. Peckham & E. G. Peckham, 1901) | Brazil, Paraguay | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Metaphidippus smithi (G. W. Peckham & E. G. Peckham, 1901) | Brazil, Paraguay | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Chirothecia daguerrei Galiano, 1972 | Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Chirothecia daguerrei Galiano, 1972 | Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Beata pernix (G. W. Peckham & E. G. Peckham, 1901) | Brazil, Paraguay | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Psecas viridipurpureus (Simon, 1901) | Brazil, Paraguay | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Avitus variabilis Mello-Leitão, 1945 | Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Psecas viridipurpureus (Simon, 1901) | Brazil, Paraguay | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Psecas chapoda (G. W. Peckham & E. G. Peckham, 1894) | Brazil, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Psecas chapoda (G. W. Peckham & E. G. Peckham, 1894) | Brazil, Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Vinnius uncatus Simon, 1902 | Brazil, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Vinnius uncatus Simon, 1902 | Brazil, Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Parafluda banksi Chickering, 1946 | Panama, Brazil, Uruguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Sarinda nigra G. W. Peckham & E. G. Peckham, 1892 | Nicaragua, Guyana, Brazil, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Sarinda nigra G. W. Peckham & E. G. Peckham, 1892 | Nicaragua, Guyana, Brazil, Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Sarinda marcosi Piza, 1937 | Brazil, Paraguay, Uruguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Sarinda marcosi Piza, 1937 | Brazil, Paraguay, Uruguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Breda bistriata (C. L. Koch, 1846) | Brazil, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Breda bistriata (C. L. Koch, 1846) | Brazil, Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Tomis palpalis F. O. Pickard-Cambridge, 1901 | Mexico, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Tomis palpalis F. O. Pickard-Cambridge, 1901 | Mexico, Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Aillutticus raizeri Ruiz & Brescovit, 2006 | Brazil, Paraguay | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Aillutticus raizeri Ruiz & Brescovit, 2006 | Brazil, Paraguay | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Colonus melanogaster (Mello-Leitão, 1917) | Brazil, Paraguay | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Colonus melanogaster (Mello-Leitão, 1917) | Brazil, Paraguay | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Colonus germaini (Simon, 1900) | French Guiana, Brazil, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Colonus germaini (Simon, 1900) | French Guiana, Brazil, Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Pachomius rubrogastrus Pett, Rubio & Stolar, 2021 | Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New species inserted | Pachomius rubrogastrus Pett, Rubio & Stolar, 2021 | Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Reference included | | | Sherwood et al., 2021c |
| 2021-07-05 | New taxonomic reference entry | Thrixopelma pruriens Schmidt, 1998 | Peru?, Chile? | | Sherwood et al., 2021c |
| 2021-07-05 | Species distribution update | Thrixopelma pruriens Schmidt, 1998 | Peru?, Chile? | (Old value) | Sherwood et al., 2021c |
| 2021-07-05 | New taxonomic reference entry | Thrixopelma peruvianum (Schmidt, 2007) | Peru | | Sherwood et al., 2021c |
| 2021-07-05 | Species transferred to new genus | Thrixopelma peruvianum (Schmidt, 2007) | Peru | Species transferred from Euathlus to Thrixopelma | Sherwood et al., 2021c |
| 2021-07-05 | Species updated | Thrixopelma peruvianum (Schmidt, 2007) | Peru | New status (Old value) | Sherwood et al., 2021c |
| 2021-07-05 | New taxonomic reference entry | Thrixopelma peruvianum (Schmidt, 2007) | Peru | | Perafán & Pérez-Miles, 2014b |
| 2021-07-05 | New taxonomic reference entry | Thrixopelma peruvianum (Schmidt, 2007) | Peru | | Schmidt, 2007f |
| 2021-07-05 | New taxonomic reference entry | Thrixopelma longicolli (Schmidt, 2003) | Ecuador, Peru | | Sherwood et al., 2021c |
| 2021-07-05 | Species transferred to new genus | Thrixopelma longicolli (Schmidt, 2003) | Ecuador, Peru | Species transferred from Lasiodorides to Thrixopelma | Sherwood et al., 2021c |
| 2021-07-05 | New taxonomic reference entry | Thrixopelma lagunas Schmidt & Rudloff, 2010 | Peru | | Sherwood et al., 2021c |
| 2021-07-05 | New taxonomic reference entry | Thrixopelma cyaneolum Schmidt, Friebolin & Friebolin, 2005 | Peru | | Sherwood et al., 2021c |
| 2021-07-05 | New taxonomic reference entry | Thrixopelma aymara (Chamberlin, 1916) | Peru | | Sherwood et al., 2021c |
| 2021-07-05 | New taxonomic reference entry | Thrixopelma ockerti Schmidt, 1994 | Peru | | Sherwood et al., 2021c |