Chileanthicus acutipennis, Kejval, 2009

Kejval, Zbyněk, 2009, Taxonomic revision of the genus Chileanthicus Werner (Coleoptera: Anthicidae) 2180, Zootaxa 2180 (1), pp. 1-82 : 12-14

publication ID	https://doi.org/ 10.11646/zootaxa.2180.1.1
DOI	https://doi.org/10.5281/zenodo.5321528
persistent identifier	https://treatment.plazi.org/id/3949251E-FFA6-776A-FF63-D8F1FDAEFB6A
treatment provided by	Felipe
scientific name	Chileanthicus acutipennis
status	sp. nov.

Treatment

Chileanthicus acutipennis sp. nov.

( Figs 9–12 View FIGURES 9–16 , 220 View FIGURES 220–231 , 240 View FIGURES 232–241 )

Type locality. Chile, Atacama, Huasco Prov. , 10 km E of Domeyco.

Description (male, holotype). Body rufous brown, elytra with vaguely outlined, transverse, yellowish band close behind mid-length (similarly as in Fig. 220 View FIGURES 220–231 ), interrupted on suture, not touching lateral margins; legs, antennae and palpi rufous brown.

Head 1.3 times as long as wide, somewhat widely rounded posteriorly in dorsal view; tempora subparallel closely behind eyes, posterior temporal angles moderately indicated, rounded. Dorsal surface glossy, distinctly punctured, unwrinkled; punctation rather coarse and evenly developed. Setation short, subdecumbent, with scattered, conspicuously long, stiff, suberect to erect setae. Eyes small, moderately convex. Antennae at most slightly enlarged in terminal third; antennomere III about 2.4 times as long as wide, moderately longer than IV; antennomere X 1.7 times, XI nearly twice as long as wide.

Pronotum 1.3 times s long as wide, slightly narrower than head including eyes, nearly evenly rounded anteriorly in dorsal view; pronotal disc convex, dorso-lateral sides entirely rounded (not carinate), lateral outlines nearly straightly narrowing posteriad in dorsal view. Dorsal surface glossy, distictly punctured, unwrinkled; punctation and setation as on head.

Elytra 1.7 times as long as wide, truncate apically. Surface glossy, largely distinctly punctured; basal punctation as coarse as and moderately sparser than that on head. Setation similar to that on head, erect setae more conspicuous/numerous.

Metafemora unidentate, similarly as in Fig. 35 View FIGURES 34–44 , subapical process small, obliquely projecting, pointed, facing outer side of tibia. Setation rather uniformly short and fine.

Abdominal sternum VII modified ( Fig. 9 View FIGURES 9–16 ), its posterior margin shallowly emarginate, lateral sides of emargination moderately produced, each with 2–4 peg-like setae. Tergum VII widely rounded posteriorly. Sternite VIII ( Figs 10, 11 View FIGURES 9–16 ); paired prongs simple, sharply curved ventrad, each with about fifteen peg-like setae ventrally. Tergite VIII distinctly emarginate postero-medially.

Aedeagus ( Fig. 12 View FIGURES 9–16 ); apical portion of tegmen short, 0.4 times as long as basal-piece, simple, with bluntly pointed apex upturned in lateral view, and distinctly protruding transverse edge dorsally at about mid-length; median lobe of aedeagus with a pair of sclerotized projections apically.

Female. Externally differing from male by elytra tapering apically ( Fig. 220 View FIGURES 220–231 ), sternum VII simple, with posterior margin evenly rounded, and tergum VII subtriangular, narrowing posteriorly.

Body length (♂ ♀). 3.2–4.4 mm (holotype 3.2 mm).

Type material. Holotype: ♂, 10 km E. Domeyco Atacama, Chile 1.X.1980 L. E. Peña leg. // Chileanthicus lafertei (Solier) det. G. Uhmann 1987 ( MNNC) . Paratypes: 1 ♂, 1 ♀ [male completely dissected], same data as holotype ( ZKDC) .

Differential diagnosis. C. acutipennis sp. nov. can be recognized by the tapering elytral apices in the female ( Fig. 220 View FIGURES 220–231 ), and by the form of the apical portion of the tegmen in the male ( Fig. 12 View FIGURES 9–16 ), which is distinctly impressed dorsally in the basal half (before the transverse edge) in lateral view, with the apex rather abruptly narrowed, and bluntly pointed in ventral view and upturned in lateral view. It also displays a low number of peg-like setae on male sternum VII ( Fig. 9 View FIGURES 9–16 ). The specimens examined share rather distinct and evenly developed punctation of the head, pronotum, and basal half of elytra, however variation of this character is not excluded.

Etymology. From Latin acutus (sharp, pointed) and penna (wing); refering to the form of elytral apices in female.

Distribution. Chile (Atacama).