Epimetopus bifidus, Perkins, 2012

Perkins, Philip D., 2012, 3531, Zootaxa 3531, pp. 1-95 : 35-36

Epimetopus bifidus , new species

Figs. 59 (habitus), 63 (aedeagus), 135 (map)

Type Material. Holotype (male): Mexico: Oaxaca, Tapanatepec , 8 mi. W Oaxaca, elev. 122 m, 16° 22' N, 94° 12' W, 10 vii 1953, Univ. Kans. Mex. Expedition ( SEMC) . Paratypes: Same data as holotype (10 SEMC) .

Differential Diagnosis. The habitus of this species ( Fig. 59) is very similar to that of other members of the Costatus group; reliable determinations will be based on examination of the aedeagus. The aedeagus is similar in general proportions to that of E. mucronatus ( Figs. 56, 63). However, the median lobe in E. bifidus is apically divided into two lobes; also, the internal sac is different in the two species, as illustrated.

Description. Size: holotype (length/width, mm): body (length from anterior margin of pronotum to elytral apices) 1.40/0.73; head (width) 0.42; pronotum 0.55/0.58; elytra 0.92/0.73. Habitus and sculpture as illustrated ( Fig. 59). Head black, frons red, clypeus black, dorsum red, venter rufous. Eye with ca. 3–4 facets between canthus and posterior margin. Elytra with elongate granules linking punctures. Metaventral depression small.

Etymology. Named in reference to the bifid apex of the median lobe of the aedeagus.

Distribution. Currently known only from the type locality in Mexico ( Fig. 135).