Euathlus Ausserer, 1875

Allegue, Maite, Peralta-Seen, Nicolás & Ferretti, Nelson, 2025, Integrative systematics of the tarantulas Euathlus Ausserer, 1875 from Argentina: cladistics, molecular phylogeny and new species (Araneae: Theraphosidae), Arthropod Systematics & Phylogeny 83, pp. 713-736 : 713-736

3.3. 1. Genus Euathlus Ausserer, 1875

Amended diagnosis.

Modified from Allegue and Ferretti 2025). Differs from all Theraphosinae genera by the presence of type IV urticating setae in combination with males having a palpal organ morphology with two prolateral keels ( PI and PS) and the tip directed retrolaterally. Most species have an apical keel. The tibial apophyses of leg I vary by one branch or two branches, both branches equal size, subequal or different sizes. All representatives of the genus have two long and thin spines retrolaterally to the tibial apophyses. Females differ by the presence of two spermathecal receptacles with a lateral spheroid chamber and only one patch of urticating setae.

Species included.

Euathlus affinis (Nicolet, 1849) , Euathlus ameghinoi , Euathlus antai , Euathlus atacama , Euathlus condorito , Euathlus diamante , Euathlus grismadoi , Euathlus manicatus , Euathlus mauryi , Euathlus pampa , Euathlus parvulus , Euathlus sagei , Euathlus tenebrarum , Euathlus truculentus , Euathlus vanessae , Euathlus ventus , Euathlus walteri , Euathlus basalticus sp. nov., Euathlus kupal sp. nov., Euathlus susanae sp. nov.