Melzerus difficilis (Melzer, 1934)

Fig. 4

Idiomerus difficilis Melzer, 1934: 98, pl. 2, fig. 13; Zikán & Wygodzinsky, 1948: 54 (type). Melzerus difficilis; Monné, 2005: 179.

Acanthoderes (Psapharochrus) minuta Fuchs, 1958: 57; Viana, 1972: 375 (distr.). syn. nov. Psapharochrus minutus; Monné, 2005: 209.

The comparison between specimens of the MNRJ with the holotype male of Idiomerus difficilis Melzer, 1934 (MZSP) and the male holotype photo of Acanthoderes (Psapharochrus) minuta Fuchs, 1958, allowed the proposed synonymy.

Specimens examined. PERU, Junin: Satipo, male, VIII.1940 (MNRJ). BRAZIL, Rondônia: Ouro Preto do Oeste, female, X.1986 (O. Roppa, P. Magno & J. Becker) (MNRJ). Mato Grosso, Rosário Oeste, male, XI.1959 (A. Maller). (MNRJ). Goiás: Jataí, male, female, X.1972 (F. M. Oliveira) (MNRJ). Perolândia, female, XII. 1972 (F. M. Oliveira) (MNRJ). Minas Gerais: Belo Horizonte, female, X.1950 (A. Machado) (MNRJ). Sete Lagoas, male, 30.X.1970 (S. Fragoso & F. Lane) (MNRJ). São Paulo: Tatuí, female, 17.X.1969 (F. A. Matthiesen) (MNRJ). Paraná: Santa Mariana, female, 7.XI.1949 (Zellibor) (MNRJ). PARAGUAY, 2 males, 3 females, 1895 (Drake) (MNRJ). Itapuá: Hohenau, male, XII.1943 (MNRJ). ARGENTINA, Formosa: female (Mallo) (MNRJ). Tucumán: Estancias Burruyacu, female, II. 1935 (J. M. Bosq) (MNRJ).

Geographical distribution. Peru, Bolivia, Brazil (Rondônia, Mato Grosso, Goiás, Minas Gerais to Paraná), Paraguay, Argentina (Formosa, Tucumán).