Arthrobrachus rufitarsis Philippi & Philippi, 1864

(Figure 8)

Arthrobrachus germaini Pic, 1919: 10; Estrada & Solervicens 1999: 52

Arthrobrachus minutus Pic, 1919: 10; Estrada & Solervicens 1999: 52

Arthrobrachus obscuripes Pic, 1927: 43 (Type locality: Fives Lille, Santa Fé), n. syn.

The examination of the genitalia and external morphology of the lectotype of Arthrobrachus obscuripes Pic, 1927 (MACN) allowed to establish its synonymy with Arthrobrachus rufitarsis Philippi & Philippi, 1864, a species originally described from Chile. Lectotype designated and described by Estrada & Solervicens (1999).

Diagnosis. Body dark-testaceous; antennae with five dilated preapical antennomeres (Fig. 8 g); pronotum with an additional carina subparallel to the lateral carina; male ventrite number 6 divided in two separated plates; tegmen without dorsal flange at the base of the parameres and with a great oblongous aperture, tegminal arms thick, first subparalell and after curved towards the apodeme, from a lateral view strongly bent downward near the apodeme (Fig. 8 a–c); median lobe almost straight, with narrow basal flection area (Fig. 8 d–f).

Distribution. ARGENTINA: provinces of Santa Fé, Neuquén and Río Negro. CHILE: between provinces of Valparaíso and Valdivia (Fig. 10).