We deal with the only three Neotropical tailed species once placed at the genera EuctaSimon, 1881 and PrionolaemaSimon, 1894, both now considered as junior synonyms of TetragnathaLatreille, 1804. Tetragnatha caudataEmerton, 1884 is redescribed and recorded from South America for the first time. Tetragnatha paraguayensis (Mello-Leitão, 1939) is redescribed and has its distribution expanded. Also, we consider Tetragnatha australis (Mello-Leitão, 1945) as its new junior synonym. Tetragnatha aetherea (Simon, 1894) is still considered valid but is not redescribed. Additionally, a fourth species, Tetragnatha caudicula (Karsch, 1879), is recorded for Mexico.
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Vol. 18 • No. 7