Chileanthicus hirsutus Kejval 2009, sp. nov.

Chileanthicus hirsutus sp. nov.

(Figs 27–32)

Type locality. Chile, Atacama, Huasco Prov., E of Vallenar, ca 12 km NW of El Transito, Pinte.

Description (male, holotype). Head and pronotum rufous brown; elytra brown with rufous tinge, with rather wide, vaguely outlined, transverse, yellowish band close behind mid-length, interrupted on suture, not touching lateral margins; legs, antennae and palpi rufous brown.

Head 1.2 times as long as wide, nearly evenly rounded posteriorly in dorsal view; tempora slightly narrowing posteriad, posterior temporal angles rounded, nearly indistinct. Dorsal surface rather moderately glossy, distinctly corrugated posteriorly; punctures at places obscured by corrugation, heterogeneous, fine to coarse. Setation conspicuous, subdecumbent to decumbent, with numerous very long, stiff, erect setae. Eyes medium-sized, only moderately convex. Antennae long and slender (Fig. 32), slightly enlarged in terminal third; antennomere III 3.2 times as long as wide, moderately longer than IV; antennomere X 1.9 times, XI 2.3 times as long as wide.

Pronotum 1.3 times as long as wide, as wide as head including eyes, evenly rounded anteriorly in dorsal view; pronotal disc convex, dorso-lateral sides rounded, lateral outlines nearly straightly narrowing posteriad in dorsal view. Dorsal surface moderately glossy, coarsely, longitudinally corrugated medially; punctation and setation similar to that on head.

Elytra 1.6 times as long as wide, convex, narrowed and conjointly rounded to subtruncate apically. Surface glossy; basal half punctation rather distinct/coarse. Setation conspicuous, similar to that on head, somewhat more raised.

Metafemora unidentate (similarly as in Fig. 35), subapical process small, pointed, obliquely projecting, facing outer side of tibia. Setation rather uniformly short and fine.

Abdominal sternum VII modified (Fig. 27), its posterior margin deeply emarginate, lateral sides of emargination moderately produced, each with 8–10 peg-like setae. Tergum VII widely rounded posteriorly. Sternite VIII (Figs 28, 29); paired prongs sharply curved ventrad, each with about 6 peg-like setae, arranged in row ventrally. Tergite VIII with posterior margin rather sharply and deeply emarginate medially (Fig. 30).

Aedeagus (Fig. 31); apical portion of tegmen short, 0.4 times as long as basal-piece, rather wide in basal half and then abruptly narrowed and moderately arcuate in lateral view, with small denticle in apical half dorsally, apex of tegmen rather strongly narrowed, rounded in ventral view; median lobe of aedeagus with a pair of slender, pointed, sclerotized projections apically.

Female. Externally differing from male by sternum VII simple, evenly rounded posteriorly, and tergum VII subtriangular, narrowed and simply rounded apically, with moderate, median longitudinal impression subapically.

Body length (♂ ♀). 4.2–4.8 mm (holotype 4.5 mm).

Variation. Rather variable in the prominence of punctation and corrugation of the head and pronotum, which may be quite indistinct, as in the male paratype.

Type material. Holotype: ♂, PINTE W. Vallenar Atac. 25.X.80 Coll:L.E.PENA // FMNH, 1986 L.E. Pena Coll Acc. # 17-422 // Chileanthicus lafertei (Solier) ♂ det. D.S. Chandler (FMNH). Paratypes: 1 ♂, 3 ♀♀, same data as holotype, but lacking the 3rd label (FMNH).

Differential diagnosis. Chileanthicus hirsutus sp. nov. seems to be close to C. elmorado sp. nov. in having a similar body form and slender antennae. It differs from the latter species by the lower number of peglike setae of sternite VIII, arranged rather in row, and mainly in the form of the apical portion of the tegmen (cf. Figs 20, 31), which is strongly narrowed and somewhat arcuate in lateral view, with a narrower, nearly bluntly pointed apex in ventral view.

Etymology. From Latin hirsutus (hairy, hirsute); named in reference to conspicuous setation of body surface.

Distribution. Chile (Atacama).