Chaco is a genus of spider in the family Pycnothelidae.
Species , the World Spider Catalog accepted the following species:
Chaco ansilta Ferretti, 2014 – Argentina Chaco aoni Allegue, Pompozzi & Ferretti, 2024 — Argentina Chaco castanea Montes de Oca & Pérez-Miles, 2013 – Uruguay Chaco costai Montes de Oca & Pérez-Miles, 2013 – Uruguay Chaco melloleitaoi (Bücherl, Timotheo & Lucas, 1971) – Brazil Chaco obscura Tullgren, 1905 (type species) – Argentina Chaco patagonica Goloboff, 1995 – Argentina Chaco sanjuanina Goloboff, 1995 – Argentina Chaco socos Goloboff, 1995 – Chile Chaco tecka Goloboff, 1995 – Argentina Chaco tigre Goloboff, 1995 – Chile Chaco tingua Indicatti et al., 2015 – Brazil Chaco tucumana Goloboff, 1995 – Argentina
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