Chileanthicus inflatus, Kejval, 2009

Kejval, Zbyněk, 2009, Taxonomic revision of the genus Chileanthicus Werner (Coleoptera: Anthicidae) 2180, Zootaxa 2180 (1), pp. 1-82 : 50-51

publication ID	https://doi.org/ 10.11646/zootaxa.2180.1.1
DOI	https://doi.org/10.5281/zenodo.5321612
persistent identifier	https://treatment.plazi.org/id/3949251E-FF9C-7755-FF63-DE05FD54FD2E
treatment provided by	Felipe
scientific name	Chileanthicus inflatus
status	sp. nov.

Treatment

Chileanthicus inflatus sp. nov.

( Figs 129–134 View FIGURES 123–134 , 224 View FIGURES 220–231 )

Type locality. Australia, Western Australia, Lake Auld , 21°44'S 123°40'E GoogleMaps .

Description (male, holotype). Head and pronotum dark rufous brown; elytra pale rufous, with slight indication of two, paired, brownish spots at about mid-length and subapically ( Figs 129 View FIGURES 123–134 , 224 View FIGURES 220–231 ); legs antennae and palpi rufous.

Head 1.3 times as long as wide, angulate posteriorly in dorsal view; tempora narrowing posteriad; posterior temporal angles less protruding but distinct, pointed, and surface posteriorly to these angles flattened to slightly impressed ( Fig. 129 View FIGURES 123–134 ). Eyes medium-sized, moderately convex. Dorsal surface matte, very densely punctured ( Fig. 129 View FIGURES 123–134 ); punctation double to somewhat heterogeneous, rather evenly developed; punctures shallow, at places nearly contiguous. Setation very short, appressed, with a few, inconspicuous erect setae. Antennae only slightly enlarged in terminal third ( Fig. 130 View FIGURES 123–134 ); antennomere III twice as long as wide, shorter than IV; antennomere X 1.6 times, XI 1.9 times as long as wide.

Pronotum about as wide as long, distinctly wider than head, widely rounded anteriorly in dorsal view. Pronotal disc moderately convex, conspicuous, ist lateral margins forming rather sharp edge, lateral outlines with slightly angular at the widest point and nearly straightly narrowing towards base in dorsal view. Dorsal surface matte, very densely punctured; punctation similar to that on head, puntures slightly larger and rather oval shaped. Setation as on head.

Elytra large, 1.7 times as long as wide, conjointly rounded apically. Surface rather glossy, distinctly but rather sparsely punctured ( Fig. 129 View FIGURES 123–134 ); basal punctation double, coarse basal punctures about as large as those on head but much deeper. Setation longer than on head, subdecumbent setae uniformly pale and evenly directed posteriad; erect setae sparsely scattered, short and inconspicuous.

Metafemora unidentate ( Fig. 131 View FIGURES 123–134 ), subapical process rather strong, pointed apically, facing inner side of tibia. Setation uniformly short, fine, appressed.

Abdominal sternum VII nearly evenly rounded posteriorly, simple. Tergum VII simple. Sternite VIII ( Fig. 132 View FIGURES 123–134 ); paired prongs flattly dilated and bilobed, with some longer setae scattered ventrally and on/near median margin. Tergite VIII simple, with posterior margin very slightly emarginate medially.

Aedeagus ( Figs 133, 134 View FIGURES 123–134 ); apical portion of tegmen 1.9 times as long as basal-piece, simple, narrow, moderately bent in lateral view, with rounded apex; median lobe terminating in a pair of slender, finely membranous lobes.

Female. Unknown.

Body length (♂). 4 mm.

Type material. Holotype: ♂, LAKE AULD 21.44 S, 123.40 E WESTERN AUSTRALIA 11–17 JUNE 1986 L. CHARLTON // Ex pitfall trap PF 3 // Western Australian Museum Entomology Reg no. 70572 ( WAM). GoogleMaps

Differential diagnosis. C. inflatus sp. nov. can be easily recognized by the combination of the following external characters: head angulate posteriorly in dorsal view; pronotal disc with rather sharply defined lateral margins; elytra large, inflated, pale coloured, without distinct markings (vague brownish spots), with double punctation (distinct coarse punctures), and simply setose (lacking setose bands); metafemora unidentate. Moreover, it differs from all Australian species by the detailed morphology of male sternite VIII and the aedeagus ( Figs 132–134 View FIGURES 123–134 ).

Etymology. From Latin inflatus (inflated, abdominous); named in reference to body proportions (larger relative size of elytra).

Distribution. Australia (Western Australia).