| 2021-07-05 | Species distribution update | Habronattus paratus (Peckham & Peckham, 1896) | Central America, Paraguay | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Wedoquella macrothecata Galiano, 1984 | Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Tullgrenella yungae Galiano, 1970 | Bolivia, Brazil, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Tullgrenella yungae Galiano, 1970 | Bolivia, Brazil, Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Phiale roburifoliata Holmberg, 1875 | Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Chira lucina Simon, 1902 | Guyana, Brazil, Paraguay | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Chira lucina Simon, 1902 | Guyana, Brazil, Paraguay | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Frigga quintensis (Tullgren, 1905) | Brazil, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Frigga quintensis (Tullgren, 1905) | Brazil, Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Aphirape riojana (Mello-Leitão, 1941) | Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Aphirape riojana (Mello-Leitão, 1941) | Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Marma nigritarsis (Simon, 1900) | Colombia, Venezuela, Guyana, French Guiana, Brazil, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Marma nigritarsis (Simon, 1900) | Colombia, Venezuela, Guyana, French Guiana, Brazil, Paraguay, Argentina | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Saitis variegatus Mello-Leitão, 1941 | Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 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 (Peckham & Peckham, 1901) | Brazil, Paraguay | (Old value) | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Metaphidippus smithi (Peckham & 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 (Peckham & 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 (Peckham & Peckham, 1894) | Brazil, Paraguay | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Psecas chapoda (Peckham & Peckham, 1894) | Brazil, Paraguay | (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 to Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | New taxonomic reference entry | Sarinda nigra Peckham & Peckham, 1892 | Nicaragua, Guyana, Brazil, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Sarinda nigra Peckham & 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) | Brazil, Paraguay, Argentina | | Pett, Rubio & Stolar, 2021 |
| 2021-07-05 | Species distribution update | Colonus germaini (Simon, 1900) | 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 |