Dirphia riograndensis C. Mielke & Moser, 2007

Figs 7a–b, 8; 12 (map)

Diagnosis. Male (Fig. 8), see also Mielke & Moser (2007: Figs 1–2): as stated in the original description, males of D. riograndensis are similar to D. sombrero (Le Cerf), but can be easily recognized by their smaller size and attributes in the genitalia (Mielke & Moser 2007: 321). Female (Figs 7a–b): wingspan 89 mm, forewing length 47 mm. The unique known female of D. riograndensis differs from the female of D. sombrero by its smaller wingspan (96 mm in D. sombrero (Miranda et al. 2015)) and for the FW postmedial line being slightly concave (bent inward in D. sombrero at CuA 1). These two species are allopatric.

Examined material (in total 7 ♁, 1 ♀). All Brazil. Santa Catarina. Bom Jardim da Serra: 1 ♁, PT (CGCM; Mielke & Moser 2007). Rio Grande do Sul. Arroio do Sal: 1 ♀, 31.VII.2022, Parque Municipal de Eventos, CTG Rincão da Estância, -29.539905, -49.900122, M. L. da Rosa leg. (DZUP). São Francisco de Paula, Rio Santa Cruz: 6 ♁, HT, PT (CGCM, CLAM, DZUP (Mielke & Moser 2007)). Photographic records: 1 ♁, Esmeralda, 28.VI.2019 by E. Gasperin (https://www.inaturalist.org/observations/27817266); 1 ♁, Osório, 28.VII.2022 by H. Andrades (https://www.inaturalist.org/observations/129087877); 1 ♁, São Francisco de Paula, 11.VII.2021 by R. Brugnera (Projeto Insetos do Brasil) (https://www.inaturalist.org/observations/86941043).

Remarks. In the original description, Mielke & Moser (2007) mentioned seven male specimens in the type series, but the female had not been described. In addition, they stated that D. riograndensis was endemic to the Serra Geral in Santa Catarina and Rio Grande do Sul (southern Brazil) at higher elevations. The record of the female reported here as well as the photographic records reveal its presence at sea level during the winter in at least Rio Grande do Sul.