Epimetopus vianai Balfour-Browne, 1949

Perkins, Philip D., 2012, 3531, Zootaxa 3531, pp. 1-95 : 65

Epimetopus vianai Balfour-Browne, 1949

Figs. 100 (habitus), 104 (aedeagus), 126 (map)

Epimetopus vianai Balfour-Browne, 1949: 14 .

Epimetopus vianai: Oliva, 1986: 12 .

Type material: Holotype (male; examined): "CORDOBA— ARGENTINA Dep. de Calamuchita " El Sauce " XII - 1938, Manuel J. Viana; 17- [green label]; Type [red disc]; Brit. Mus. 1966-473; Epimetopus vianai Type J. Balfour- Browne det." ( BMNH).

Differential diagnosis. The dorsal habitus of E. vianai ( Fig. 100) is very similar to that of other members of the Plaumanni group. It differs from the others in having a slightly more elongate pronotum. Males have the clypeus upturned, as do E. vulpinus and E. multiportus . Examination of the male genitalia will be essential for reliable determinations. The aedeagus is similar in size and general proportions to that of E. plaumanni ( Figs. 103, 104); it differs therefrom in the following: 1) the dorsal processes are shaped differently, being larger and having the apices turning outward and sharply pointed at the tip, a character not seen in the other species; 2) the length of the median lobe above the dorsal processes is less; 3) the apex of the median lobe is shaped differently, being more deeply bifurcate in E. vianai ; and 4) the apices of the parameres are shaped differently, in E. vianai being more truncate, and in E. plaumanni being produced in a point on the medial side. There are also differences in the internal structure of the median lobe in the two species, E. vianai having the internal sac wider and much less densely spiculate.

Description. Size: holotype (length/width, mm): body (length from anterior margin of pronotum to elytral apices) 2.44/1.20; head (width) 0.62; pronotum 0.88/0.90; elytra 1.60/1.20. Habitus as illustrated ( Fig. 100). Head piceous, maxillary palpi light brown; pronotum dark brown to piceous; elytra dark brown except yellowish, large V-shaped fascia near midlength, and faintly yellowish at apical 1/3 of elytra; venter and coxae piceous, remainder of legs reddish brown; legs rufous. Pronotum with hood carinae very slightly arcuate, almost straight, converging and confluent anteriorly, grooved throughout; secondary lateral very small, almost absent. Elytron with four strong granulate carinae, third interrupted anteriorly for distance of ca. 3 punctures; punctures round or oval, large, each with small granule at anterior margin, non-carinate intervals without granules. Protibiae straight on inner margin, outer margin weakly arcuate. Metaventral depression moderately large, ca. 9 granules along base.

Distribution. Currently known from Argentina ( Fig. 126). Oliva (1986) reported specimens from several Provinces in Argentina; these specimens were not seen during this revision, and therefore could not be confirmed as E. vianai .