similis Spinelli & Marino, in Spinelli et al., 2006: 316 (male, female). Type locality: Argentina, Chubut, PN Los Alerces, southern shore lago Futalufquen, 42°53'13.85"S, 71°36'10.62"W. HT M (MLPA). Distr.: Chile, Argentina (Neuquén: laguna Epulaufquen, 36°50'9.49"S, 71°1'1.08"W; 30 km W Chos Malal, 37°16'56.68", 70°34'33.42"W (as obfuscatus); 20 km W lago Aluminé, 38°59'15.93"S, 71°17'7.08"W; Buenos Aires: Sierra de la Ventana, arroyo Rivera, 38º13'53.4''S, 61º48'01.3''W, 228 m. Chubut: type locality). Refs.: Spinelli et al., 2006: 316; Marino et al., 2011a: 201.

Diagnosis. The only species of Atrichopogon from Patagonia with the following combination of characters: male with fifth palpal segment rounded, abdominal terga with pattern of pigmentation; gonostylus clearly shorter than gonocoxite; aedeagal-parameral complex broad, posterodorsal proyection tapering to cap-like tip; striated posteroventrally; with V-shaped, sclerotized, dorsal sclerite reaching cap-like tip. Female: flagellomeres 1-8 slightly broader than long, subspherical; fifth palpal segment rounded, abdominal terga with pattern of pigmentation; wing macrotrichiae in cells r3, m1, m2 and 2-3 in cell cua1.