Chileanthicus baculentus, Kejval, 2009

Kejval, Zbyněk, 2009, Taxonomic revision of the genus Chileanthicus Werner (Coleoptera: Anthicidae) 2180, Zootaxa 2180 (1), pp. 1-82 : 14-15

Chileanthicus baculentus sp. nov.

( Figs 13–16 )

Type locality. Chile, Coquimbo, Limarí Prov., 8 km SW of Ovalle, Corral de Julio.

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

Head 1.3 times as long as wide, unevely rounded posteriorly in dorsal view; tempora subparallel, posterior temporal angles slightly indicated, rounded. Dorsal surface rather glossy, finely but distinctly punctured, unwrinkled; punctation somewhat uneven, with some coarser punctures. Setation decumbent, with scattered, moderately longer, suberect to erect setae. Eyes small, moderately convex. Antennae strong, moderately enlarged in terminal third; antennomere III 2.1 times as long as wide, moderately longer than IV; antennomere X 1.3 times, XI 1.8 times as long as wide.

Pronotum 1.4 times s long as wide, slightly narrower than head including eyes, rounded anteriorly in dorsal view; pronotal disc moderately convex, dorso-lateral sides forming short, rounded edge near the widest point, their lateral outlines nearly straightly narrowing posteriad in dorsal view. Dorsal surface rather glossy, punctured, unwrinkled; punctation and setation as on head.

Elytra 1.5 times as long as wide, truncate apically. Surface glossy; basal punctation generally finer and sparser that on head. Setation similar, only somewhat longer than on head.

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. 13 ), its posterior margin shallowly emarginate, lateral sides of emargination each with 20–23 peg-like setae. Tergum VII moderately widely rounded posteriorly. Sternite VIII ( Figs 14, 15 ); paired prongs simple, sharply curved ventrad, each with about 11 peg-like setae ventrally. Tergite VIII evenly rounded posteriorly.

Aedeagus ( Fig. 16 ); apical portion of tegmen short, 0.4 times as long as basal-piece, simple, straightly narrowing towards wide, rounded apex in ventral view, sinuous, rather strongly convex dorsally subapically in lateral view (hollowed ventrally at this place), with long, laterally slightly lobed, transverse edge dorsally in basal half; median lobe of aedeagus apically with a pair of sclerotized, comparatively short projections.

Female. Externally differing from male mainly by sternum VII simple, evenly rounded posteriorly; tergum VII subtriangular, more narrowed posteriorly than in male, flattened to slightly impressed subapically, with rounded apical margin.

Body length (♂ ♀). 2.9–3.1 mm (holotype 3.1 mm).

Variation (see Remarks).

Type material. Holotype: ♂, CHILE LIMARÍ Corral de Julio 10 Octubre 1972 J. Solervicens leg. ( MNNC) . Paratype: ♀, same data as holotype ( MNNC) .

Additional material. 2 ♂♂, 1 ♀, Chile, Coquimbo ( MNNC) .

Etymology. From Latin baculus (peg) and opulentus (rich, opulent); refering to high number of peg-like setae of male sternum VII.

Differential diagnosis. C. baculentus sp. nov. can be recognized by the comparatively strong antennae, with less elongate proximal antennomeres, by male sternum VII being rather shallowly emarginate posteromedially and bearing a large number (about 40) of peg-like setae ( Fig. 13 ), by male tergite VIII being evenly rounded posteriorly (lacking a postero-median emargination), and by the apical portion of tegmen ( Fig. 16 ), which is evenly narrowed and rounded to subtruncate apically in ventral view, with a beak-like shaped apex in lateral view, and with a conspicuously long, transverse edge on the dorsal side, shortly before mid-length.

Distribution. Chile (Coquimbo).

Remarks. The additional specimens examined are insufficiently labelled, and their identification is tentative. They resemble C. baculentus sp. nov. in many respects, but differ by male sternum VII somewhat more distinctly emarginate, with about 30 peg-like setae, male tergite VIII moderately emarginate posteromedially, apical portion of tegmen less sinuous, less convex/hollowed subapically, and by more convex tergum VII in female. They may represent a different species, however more extensive material from different localities is necessary for evaluation of the mentioned differences.

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 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.