Chileanthicus decipiens, Kejval, 2009

Kejval, Zbyněk, 2009, Taxonomic revision of the genus Chileanthicus Werner (Coleoptera: Anthicidae) 2180, Zootaxa 2180 (1), pp. 1-82 : 38-40

Chileanthicus decipiens sp. nov.

( Figs 86–89 )

Type locality. Australia, New South Wales .

Description (male, holotype). head brown; pronotum brown, slightly paler than head, with rufous tinge; elytra dark brown, with two, narrow, rather vaquely outlined, transverse bands ( Fig. 86 ); antennae and palpi brown, legs rufous brown.

Head 1.2 times as long as wide, unevenly to nearly widely rounded posteriorly; tempora moderately narrowing posteriad; posterior temporal angles somewhat rounded and less prominent. Eyes small, convex. Dorsal surface moderately glossy, rather densely punctured ( Fig. 86 ); punctation conspicuous, double, rather evenly dense, including median line. Setation short, subdecumbent, with scattered, longer and rather distinct, erect setae. Antennae moderately enlarged in terminal third; antennomere III twice as long as wide, about as long as IV; antennomere X 1.3 times, antennomere XI twice as long as wide.

Pronotum 1.1 times as long as wide, as wide as head including eyes, widely rounded anteriorly in dorsal view. Pronotal disc less distinct, convex, dorso-lateral sides rather rounded, lateral outlines nearly straightly narrowing towards base in dorsal view. Dorsal surface moderately glossy, densely punctured; punctation similar to that of head. Setation as on head.

Elytra 1.9 times as long as wide, conjointly rounded apically. Surface moderately glossy, distinctly punctured ( Fig. 86 ); basal half punctation clearly double, distinctly sparser than on head, coarse punctures nearly as large and prominent as those on head. Setation more distinct, longer than on head, subdecumbent, mostly brownish, with silvery setae forming two, paired, narrow, transverse bands, obliquely directed and distinctly swirled; erect setae longer, rather numerous and conspicuous.

Metafemora unidentate ( Fig. 87 ); subapical process rather wide basally, narrowed and pointed apically, facing inner side of tibia. Setation rather uniformly short, appressed to subdecumbent.

Abdominal sternum VII and tergum VII simple. Sternite VII ( Fig. 88 ); paired prongs moderately arcuate, widened apically, with short and rather orderly setation. Tergite VIII simple, widely rounded posteriorly.

Aedeagus ( Fig. 89 ); apical portion of tegmen about 1.5 as long as basal-piece, widened at about midlength and than strongly narrowing towards simple, pointed apex, moderately sinuous in lateral view; lateral margins of tegmen (rolled ventrally) in terminal third with narrow lobule. Median lobe of aedeagus narrow, somewhat more sclerotized (pigmented) in apical third ventrally, with a pair of membranous, finely serulate apical lobes.

Female. Externally identical to male.

Body length. 3.8–4.4 mm (holotype 3.8 mm).

Variation. Moderately variable in colouration; a paratype is distinctly paler coloured, with the elytra largely brown, darkened only laterally, between setose bands, and in the apical third, except suture paler.

Type material. Holotype: ♂, E. SMITH N. S. W 7/49 // quadrimaculatus King. // J. G. Brooks Bequest 1976” ( ANIC) . Paratypes: 2 ♀♀ [originally mounted on the same label], same data as holotype ( ANIC) .

Differential diagnosis. C. decipiens sp. nov. is externally nearly identical to C. interruptus . They can be barely distinguished by external characters, but differ clearly in the morphology of male sternite VII and the aedeagus (cf. Figs 88, 89 and 143, 145 ).

Etymology. From Latin decipiens (deceptive, false); named in reference to its overall external similarity with C. interruptus .

Distribution. Australia (New South Wales).

Figures

FIGURES 81–89: Chileanthicus communis sp. nov., male, holotype: 81, body form and punctation of head (top) and elytra (bottom); 82, metafemur; 83, sternite VIII; 84, segment IX (spiculum); 85, apical portion of aedeagus in ventral (left) and lateral (right) view; C. decipiens sp. nov., male, holotype: 86, body form and punctation of head (top) and elytra (bottom); 87, metafemur; 88, sternite VIII; 89, aedeagus in ventral (right) and lateral (left) view. Scale (1.0 mm): A, 81, 86; B, 82, 84, 87; (0.2 mm) C, 83, 89; D, 88; E, 85.

FIGURES 135–145: Chileanthicus insignis sp. nov., male, holotype: 135, body form and punctation of head (top) and elytra (bottom); 136, metafemur; 137, sternite VIII; 138, tergite VIII; 139, segment IX (spiculum); 140, apex of aedeagus in ventral (left) and lateral (right) view; C. interruptus (Lea), male, Townsville (SAMA): 141, body form and punctation of head (top) and elytra (bottom); 142, metafemur; 143, sternite VIII; 144, segment IX (spiculum); 145, apex of aedeagus in ventral (right) and lateral (left) view. Scale (1.0 mm): A, 135, 141; B, 136, 142; (0.5 mm): C, 136; D, 139, 143, 144; (0.2 mm): E, 137; F, 140, 145.