Chileanthicus communis, Kejval, 2009

Kejval, Zbyněk, 2009, Taxonomic revision of the genus Chileanthicus Werner (Coleoptera: Anthicidae) 2180, Zootaxa 2180 (1), pp. 1-82 : 37-38

publication ID	https://doi.org/ 10.11646/zootaxa.2180.1.1
DOI	https://doi.org/10.5281/zenodo.5321588
persistent identifier	https://treatment.plazi.org/id/3949251E-FF89-7742-FF63-DC75FD54FCEF
treatment provided by	Felipe
scientific name	Chileanthicus communis
status	sp. nov.

Treatment

Chileanthicus communis sp. nov.

( Figs 81–85 View FIGURES 81–89 , 233 View FIGURES 232–241 )

Type locality. Australia, Western Australia, 13.7 km SE of Burranbar Pool, on Savory Creek , 23°53'17"S 120°31'10"E GoogleMaps .

Description (male, holotype). Head largely dark brown with slight vinous tinge, rufous brown anteriorly on frons; pronotum rufous brown; elytra dark brown, with narrowly paler suture and lateral margins, and with two rufous bands/spots, touching neither suture nor lateral margins ( Fig. 81 View FIGURES 81–89 ); the anterior band very vaguely indicated, narrow, discontinuous, the posterior band/spot wider and more prominent; legs rufous, antennae and palpi dark rufous.

Head 1.1 times as long as wide, widely rounded posteriorly in dorsal view; posterior temporal angles indicated. Eyes small, moderately convex. Dorsal surface matte, very densely punctured; punctation simple, punctures rather large, shallow, nearly contiguous, evenly spaced, including median line ( Fig. 81 View FIGURES 81–89 ). Setation short, appressed to subdecumbent, with a few slightly longer, inconspicuous, erect setae. Antennae moderately enlarged in terminal third; antennomere III 1.8 times as long as wide, as long as IV; antennomere X 1.1 times, XI 1.7 times as long as wide.

Pronotum nearly as long as wide, moderately wider than head including eyes, widely rounded anteriorly in dorsal view. Pronotal disc moderately convex, ist lateral margins forming rounded edge, lateral outlines nearly straightly narrowing towards base in dorsal view. Dorsal surface matte, densely punctured; punctation as on head. Setation as on head.

Elytra 1.7 times as long as wide, conjointly rounded apically. Surface nearly matte, densely punctured and somewhat uneven/rugose ( Fig. 81 View FIGURES 81–89 ); basal punctation simple, punctures much smaller than those on head. Setation slightly longer than on head, appressed to subdecumbent, brownish, with silvery setae both scattered on dark surface and covering pale elytral bands/spots ( Fig. 233 View FIGURES 232–241 ); silvery setae forming two setose bands, the anterior band only vaguely indicated, the posterior one conspicuous and distinctly swirled medially; erect setae short, sparsely scattered, mainly in apical third.

Metafemora unidentate ( Fig. 82 View FIGURES 81–89 ), subapical process pointed, facing inner side of tibia. Meso- and metatibiae with minute denticle on inner side apically (more prominent in metatibiae). Setation rather uniformly short, fine, appressed.

Abdominal sternum III with small protuberance medially at about mid-length. Sternum VII simple, with posterior margin slightly produced medially. Tergum VII simple. Sternite VIII ( Fig. 83 View FIGURES 81–89 ); paired prongs strongly arcuate, their apical side dilated into rounded lobe and sparsely setose. Tergite VIII simple, with posterior margin evenly rounded. Segment IX (spiculum) as in Fig. 84 View FIGURES 81–89 .

Aedeagus ( Fig. 85 View FIGURES 81–89 ); apical portion of tegmen 2.1 times as long as basal-piece, moderately sinuous in lateral view, nearly evenly narrowing towards trilobed apex in dorsal view; median lobe with a pair of long, narrow, finely membranous projections subapically.

Female. In most external characters identical to male, but differs by simple meso- and metatibiae (lacking apical denticle). In addition, female specimens display less distinct paler marking and setose bands of elytra (see Variability).

Body length. 3.0– 3.5 mm (holotype 3.4 mm).

Variation. Rather variable in the prominence of the colour/setose marking of the elytra; even the posterior band may be narrow, vaguely indicated, with paler marking entirely reduced and silvery setae at most moderately oblique, not swirled ( Fig. 233 View FIGURES 232–241 ). This condition occurs in all female and rather exceptionally in male specimens. Numerous specimens have the head with a short, sparsely punctured, glossy line/facet antero-medially on the frons.

Type material. Holotype: ♂, WA: Little Sandy Desert 23°53'17"S, 120°31'10"E 13.7 km SE Burranbar Pool on Savory Creek Oct 1997 S. van Leeuwen, B. Bromilow // bucket pitfall trap, ethylene glycol & formaldehyde open low Eucalyptus chippendale woodland dune area LSD-S4-F2 // EX. SPIRIT COLLECTION // Western Australian Museum Entomology Reg no. 70583 ( WAM) GoogleMaps . Paratypes: 24 ♂♂, 33 ♀♀, same data as holotype, but different registration numbers: 70579 to 70582, 70584 to 70636 ( WAT, 5 specimens ZKDC) GoogleMaps .

Differential diagnosis. C. communis sp. nov. seems to be related to C. eyrensis sp. nov. in having a similar body form and characters of the body setation (silvery setae both forming setose bands and scattered, including dorsal side). They also share rather short, and in the terminal third moderately but distinctly enlarged antennae ( Fig. 113 View FIGURES 112–122 ). C. communis sp. nov. differs from the latter species by the nearly matte, densely punctured and somewhat rugose surface of the elytra, the antero-laterally rounded pronotum in dorsal view (slightly angulate in C. eyrensis sp. nov.; cf. Figs 81 View FIGURES 81–89 , 112 View FIGURES 112–122 ), and by all the male characters (cf. Figs 83, 85 View FIGURES 81–89 and 116, 117 View FIGURES 112–122 ).