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The spider family Filistatidae is represented in Argentina by at least twelve species. The synanthropic and apparently introduced Kukulcania hibernalis (Hentz) is the only representative of the Filistatinae. The remaining species all belong to Prithinae. Two new prithine genera are described: Lihuelistata is erected for Filistata metamerica Mello-Leitão, and Misionella is erected for Filistata mendensis Mello-Leitão. Pikelinia Mello-Leitão is represented by P. tambilloi (Mello-Leitão), P. patagonica (Mello-Leitão), newly transferred from Malalistata, and seven new species: P. colloncura, P. mahuell, P. roigi, P. kolla, P. ticucho, P. toba and P. puna. The genus Malalistata Mello-Leitão is newly synonymized with Pikelinia. Filistata fasciata Banks, is transferred to Pikelinia. A cladistic analysis of filistatid genera is made, based on a data matrix of 13 terminals scored for 29 characters. Pikelinia, Lihuelistata …