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

Chileanthicus acutipennis sp. nov.

( Figs 9–12 , 220 , 240 )

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 ), 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 , subapical process small, obliquely projecting, pointed, facing outer side of tibia. Setation rather uniformly short and fine.

Abdominal sternum VII modified ( Fig. 9 ), 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 ); paired prongs simple, sharply curved ventrad, each with about fifteen peg-like setae ventrally. Tergite VIII distinctly emarginate postero-medially.

Aedeagus ( Fig. 12 ); 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 ), 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 ), and by the form of the apical portion of the tegmen in the male ( Fig. 12 ), 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 ). 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).

Figures

FIGURES 9–16: Chileanthicus acutipennis sp. nov., male, holotype: 9, sternum VII; 10, sternite VIII (half), dorsal view; 11, sternite VIII, lateral view; 12, aedeagus, ventral (left) and lateral (right) view; C. baculentus sp. nov., male, holotype: 13, sternum VII; 14, sternite VIII (half), dorsal view; 15, sternite VIII, lateral view; 16, aedeagus, ventral (right) and lateral (left) view. Scale (0.5 mm): A, 9, 12; B, 10, 11, 13–15; C, 16.

FIGURES 220–231: Habitus of Chileanthicus species: 220, C. acutipennis sp. nov. (female); 221, C. maritimus sp. nov.; 222, C. dentatus (Dajoz); 223, C. angulicollis sp. nov.; 224, C. inflatus sp. nov.; 225, C. uhmanni sp. nov.; 226, C. discus sp. nov.; 227, C. mastersii (King); 228, C. pulcher sp. nov.; 229, C. pumilio sp. nov.; 230, C. quadrimaculatus (King); 231, C. speciosus (King).

FIGURES 232–241: Elytra of Chileanthicus species: 232, C. audax sp. nov.; 233, C. communis sp. nov.; 234, C. improvidus sp. nov.; 235, C. kinchega sp. nov.; 236, C. mastersii (King); 237, C. pulcher sp. nov.; 238, C. pumilio sp. nov.; 239, C. speciosus (King); 240, C. acutipennis sp. nov., apices of elytra in female; 241, C. discus sp. nov., head and pronotum in lateral view.

FIGURES 34–44: Chilenathicus lafertei (Solier), female, syntype (MNHN): 34, body form; 35, metafemur, lateral view; 36, sternum VII; 37, tergum VII; C. maritimus sp. nov., male, holotype: 38, sternum VII; 39, sternite VIII (half), dorsal view; 40, sternite VIII, lateral view; 41, aedeagus, ventral (right) and lateral (left) view; 42, apex of aedeagus, ventral view; Metafemur, lateral view: 43, C. elmorado sp. nov.; 44, C. femineus sp. nov. Scale (0.5 mm): A, 39, 40; B, 38; C, 41, 42; D, 35, 36, 38, 43, 44; (1 mm): E, 34.