Epimetopus coleuncus, Perkins, 2012

Perkins, Philip D., 2012, 3531, Zootaxa 3531, pp. 1-95 : 49-51

Epimetopus coleuncus , new species

Figs. 84 (habitus), 85 (aedeagus), 127 (map)

Type Material. Holotype (male): Argentina: Tucuman, Rio Salas , departamento de Burruyacu, 26° 30' S, 64° 45' W, 12 ii 1982, Golbach ( MACN) . Paratypes (7): Same data as holotype (6 MACN) ; Bolivia: Tarija, Ing. Bermejo, 21° 32' S, 64° 44' W, 14–28 ii 1969, R. Golbach (1 MACN) .

Differential Diagnosis. Differing externally from other members of the Mendeli group by the pit-like depression at the base of the fused pronotal carinae ( Fig. 84). The aedeagus differs from that of E. angulatus ( Figs. 79, 80, 85) in several respects, including the following: 1) it is not as wide, the lateral processes of the median lobe being notably smaller; 2) the median lobe apical part is wider, arcuate laterally, whereas in E. angulatus the apical part is emarginate laterally; 3) the hooks each rest in a groove on the dorsal surface of the median lobe, whereas in E. angulatus the hooks rest in a slot on each side; 4) the parameres are shaped differently; and 5) the basal piece is longer in E. coleuncus . It differs from E. mendeli in 1) the shape and length of the parameres, 2) the shape of the apical part of the median lobe (more rounded at the tips), and 3) in having wider lateral processes of the median lobe.

Description. Size: holotype (length/width, mm): body (length from anterior margin of pronotum to elytral apices) 2.74/1.45; head (width) 0.69; pronotum 0.95/1.05; elytra 1.90/1.45. Habitus as illustrated ( Fig. 84). Head and pronotum piceous, maxillary palpi brown; elytra dark brown without hint of fascia; venter black, coxae and basal ½ of femora piceus, remainder of legs dark brown. Eye canthus incomplete, ca. 3 facets between canthus and posterior margin. Pronotum with hood carinae arcuate, completely confluent in anterior ½, grooved throughout; primary lateral lobe with anterior angle produced and acute; secondary lateral lobe very small. Elytron with four carinae, third interrupted anteriorly for distance of ca. 3–4 punctures; first three carinae (from suture) very low and very weakly granulate; 4th carina higher and more strongly granulate; punctures round, large, each with minute granule at anterior margin, non-carinate intervals with unilinear row of minute, well separated granules. Protibiae straight or very slightly emarginate on inner margin, outer margin weakly arcuate. Metaventral depression shallow, ca. six granules along base.

Etymology. Named in reference to the sheathed hooks of the median lobe of the aedeagus.

Distribution. Currently known from Argentina and Bolivia ( Fig. 127).