Habronattus aestus sp. n. 1 Left male palp, ventral view (holotype) 2 Same, retrolateral view of palp tibia 3 Epigynum, ventral view (paratype described) 4 Epigynum, cleared, dorsal view, same female 5–7 Male AZS13-7854 (paratype) 8 Female AZS13-7889 9–10 Female AZS13-7885 11 Female AZS13-7874 12 Juvenile AZS13-8283. All specimens are from Estero Cerro Prieto (WPM#13-086) except holotype, from Estero Morúa (WPM#03-001). Figures 5–12 are copyright © 2015 W. P. Maddison, released under a Creative Commons Attribution (CC-BY) 3.0 license.