Chileanthicus mitis, Kejval, 2009

Kejval, Zbyněk, 2009, Taxonomic revision of the genus Chileanthicus Werner (Coleoptera: Anthicidae) 2180, Zootaxa 2180 (1), pp. 1-82 : 23-25

Chileanthicus mitis sp. nov.

( Figs 45–48 )

Type locality. Chile, Coquimbo, Elqui Prov. , ca 40 km N of La Serena, 29°30'S 71°13'E, beside Panamericana highway .

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

Head about 1.3 times as long as wide, nearly widely rounded posteriorly in dorsal view; tempora parallel close behind eyes, posterior temporal angles moderately indicated, rounded. Dorsal surface smooth and glossy; punctation fine but distinct, rather evenly developed. Setation mostly short, subdecumbent, with a few distinctly longer, more raised setae. Eyes small, moderately convex. Antennae at most slightly enlarged in terminal third; antennomere III 2.4 times as long as wide, slightly longer than IV; antennomere X 1.4 times, XI 1.9 as long as wide.

Pronotum 1.3 times as long as wide, slightly narrower than head including eyes, nearly evenly rounded anteriorly in dorsal view; pronotal disc convex, dorso-lateral sides entirely rounded, lateral outlines nearly straightly narrowing posteriad in dorsal view. Dorsal surface smooth, glossy, finely but distinctly punctured; punctation and setation as on head.

Elytra 1.7 times as long as wide, truncate apically. Surface glossy, finely punctured; basal punctation finer and somewhat sparser than that on head. Setation generally as 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. 45 ), at most moderately emarginate postero-medially, lateral sides of emargination barely produced, each with 6–7 peg-like setae. Tergum VII widely rounded posteriorly. Sternite VIII ( Figs 46, 47 ); paired prongs simple, sharply curved ventrad, their distal portion narrow, each with about 8 peg-like setae arranged in single row along ventro-lateral margin. Tergite VIII somewhat unevenly rounded posteriorly.

Aedeagus ( Fig. 48 ); apical portion of tegmen short, about 0.5 times as long as basal-piece, simple, narrowed, with wide, somewhat triangular apex in ventral view, its dorsal outline moderately and rather smoothly sinuous in lateral view; median lobe of aedeagus with a pair of slender, sclerotized projections apically.

Female. Externally differing from male mainly by sternum VII simple, with posterior margin evenly rounded; tergum VII subtriangular, narrowing posteriorly.

Body length (♂ ♀). 2.9–3.5 mm (holotype 3.2 mm).

Variation. The female paratype from the type locality is somewhat aberrant in having a wider head, 1.2 times as wide as pronotum (1.04 times in the holotype), and more distinct/coarser punctation of the head and pronotum. The specimens from Choros Bajos are generally darker coloured (the transverse band of the elytra is rather vaguely indicated), differing in the prominence/density of body punctation. One of the specimens has traces of fine corrugation on the head dorsally.

Type material. Holotype: ♂, 40 km N La Serena Panam. Norte IV Reg. 380 m 18 – SEP – 2000 Leg. F. Ramírez ( MNNC) . Paratypes: 1 ♂, 1 ♀, the same data as holotype, but lacking the 2nd label ( MNNC, ZKDC) ; 2 ♂♂, 1 ♀ [a male in poor stand, lacking head and pronotum], Choros Bajos prov. Elqui CHILE 8-XI-1991 leg. J. E. Barriga // Collection J. E. Barriga CHILE 19364 ( JEBC, ZKDC) .

Differential diagnosis. Chileanthicus mitis sp. nov. can be recognized by the following characters: male sternum VII only moderately emarginate medially, lateral sides of emargination not produced and bearing a lower number of peg-like setae (6–7 on each side); prongs of sternite VIII evenly narrowed distally, with peglike setae arranged in a single row; in lateral view apical portion of tegmen smoothly sinuous dorsally (lacking a tooth-like protrusion/edge), apex of tegmen wide, nearly subtriangular in ventral view.

Etymology. From Latin mitis (silent, serene); named after the town La Serena.

Distribution. Chile (Coquimbo).

Figures

FIGURES 45–53: Chileanthicus mitis sp. nov., male, holotype: 45, sternum VII; 46, sternite VIII (half), dorsal view; 47, sternite VIII, lateral view; 48, aedeagus, ventral (left) and lateral (right) view; C. penai (Werner), male, paratype (UAIC): 49, sternum VII; 50, sternite VIII (half), dorsal view; 51, abdominal segment IX; 52, aedeagus in ventral (right) and its apical portion in lateral (left) view; 53, apex of abdomen in female, lateral view. Scale (0.5 mm): A, 45, 49, 51; B, 48; C, 53; (0.2 mm): D, 50; E, 46, 47; F, 52.

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.