endemicus Spinelli & Marino, in Spinelli et al., 2006: 304 (male, female). Type locality: Argentina, Río Negro, meseta de Somuncura, estancia El Rincón, 40°59'24.1''S, 66°40'35.7''W, 620 m. HT M (MLPA). Distr.: Chile, Argentina (San Luis: Merlo, Reserva Municipal Arroyo El Molino, 32º21'09.7''S, 64º57'11.3''W, 1240 m. Buenos Aires: Sierra de la Ventana, arroyo Napostá Grande, 38º08'44.2''S, 62º05'32.7'', 300 m; Sierra de la Ventana, Reserva Parque Provincial Ernesto Tornquist, arroyo de la clausura, 38º02'46.1''S, 61º59'10.1''W; Sierra de la Ventana, arroyo Belisario, 38º05'18.7''S, 61º55'46.9''W, 376; Sierra de la Ventana, arroyo Napostá Chico o Bajo Hondo, 38°12'00”S, 62°01'00W''. Río Negro: type locality; meseta de Somuncura, Chipauquil, vertiente arroyo Valcheta, 40°58'25''S, 66°39'14.7''W, 630 m; meseta de Somuncura, Estancia La Rinconada, vertientes arroyo Comi Có, 41°08'35.1''S, 67°27'34.6''W, 1000 m; meseta de Somuncura, vertiente y chorrillo, Estancia Jaguar Musso, Paraje Chasicó, 41°08'28''S, 67°35'43.9''W, 961 m. Chubut: meseta de Somuncura, arroyo Telsen, 42°28'35.2''S, 66°52'8''W, 276 m). Refs.: Spinelli et al., 2006: 304; Muzón et al., 2010: 113; Spinelli et al., 2010: 128; Marino et al., 2011: 201.
NEW RECORDS:
Córdoba: paraje Las Jarillas, río San Antonio, 31º32'02.8''S, 64º33'01.7''W, 820 m.


Diagnosis. The only species of Atrichopogon from Patagonia with the following combinatioil of characters: male with fifth palpal segment rounded; scutum and abdominal terga with pattern of pigmentation; aedeagal-parameral complex composed only of ventral portion, with conical posteromedial lobe, basal arch striated, extending to 1/2 of total length. Female: fifth palpal segment rounded; sculum and abdominal terga with pattern of pigmentation; wing with many macrotrichiae in apical portion of cell r3 and a few in cell m1.