Chileanthicus dentivarius Kejval 2009, comb. nov.
Creators: name: Kejval, Zbyněk
Publisher: name: Zenodo
Year: 2009
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Anthicidae
Chileanthicus
Chileanthicus dentivarius

description: <i>Chileanthicus dentivarius</i> (Lea, 1922) comb. nov. (Figs 94–101) <i>Formicomus dentivarius</i> Lea, 1922: 505. <b>Type locality.</b> Australia, Western Australia, Cue, 27°27'S 117°53'E. <b>Redescription</b> (male, syntype). Head and pronotum largely rufous brown; elytra brown black, with rufous lateral margins, suture and two paired bands/spots (Fig. 94), the anterior band larger, oblique, the posterior band rather transverse; legs, antennae and palpi rufous brown. Head 1.2 times as long as wide, widely rounded posteriorly; tempora parallel; posterior temporal angles somewhat rounded, but distinct. Eyes small, rather convex. Dorsal surface matte, densely punctured (Fig. 94); punctations simple, rather evenly developed, somewhat sparser only near base. Setation short, decumbent, pale, with numerous long, erect, darker setae. Antennae moderately enlarged in terminal third; antennomere X 1.6 times, XI 2.4 times as long as wide. Pronotum large, about as long as wide, conspicuously wider than head including eyes, widely rounded anteriorly, strongly bulging posteriorly, antebasal sulcus thus not clearly visible in dorsal view (Fig. 94); pronotal disc moderately convex, slightly impressed medially, near base, its lateral margins forming rounded but distinct edge, lateral outlines arcuately narrowing posteriad in dorsal view. Dorsal surface matte, densely punctured; punctation similar to that of head, but punctures larger and rather oval. Setation as on head, erect setae more numerous and conspicuous. Elytra 1.7 times as long as wide, evenly shaped, conjointly rounded apically. Surface slightly glossy; punctation conspicuosly double (Fig. 94); coarse basal punctures very deep, dot-like, becoming gradually smaller towards elytral apices. Setation rather heterogeneous, mostly short, subdecumbent, brownish, silvery and distinctly swirled on elytral bands/spots (Fig. 94); erect setae numerous, long and conspicuous. Metafemora tridentate (Fig. 95), all subapical processes narrow, pointed apically, one of them facing outer, another two inner side of tibia. Setation generally more raised, with some longer setae; meso- and especially metatibia with short, stiff, bluntly pointed setae forming apical fringe and scattered on outer side, metatibiae in addition with numerous conspicuously long, raised setae on inner side distally (Figs 96, 97); paired terminal spurs reduced in metatibiae. Abdominal sternum VII and tergum VII simple. Sternite VIII (Fig. 98); paired prongs simple, evenly narrowing towards rounded apex, rather sparsely setose. Tergite VIII simple, with posterior margin at most slightly emarginate medially. Segment IX (spiculum) as in Fig. 99. Aedeagus (Figs 100, 101); apical portion of tegmen shorter, 0.6 times as long as basal-piece, simple, evenly narrowing, with flattened, nearly sharply pointed apex; median lobe of aedeagus with membranous, densely spinulose distal portion, terminating in rounded apical lobe. Female. Externally identical to male. Body length. 2.8–6.2 mm. <b>Variation.</b> Rather variable in size. Some specimens have the head and pronotum nearly brown black, the elytra black, and the rufous bands/spots of elytra are usually interconnected along lateral the margins. The smaller, outer subapical process of the metafemora is sometimes less distinct. <b>Type material.</b> Syntypes: 1 &amp;male;, 3 &amp;female;&amp;female; [mounted on the same card], dentivarius Lea, TYPE Cue [h+p] // Formicomus dentivarius Lea W. Australia. TYPE I.15262 [h; “TYPE” red] // S. Aust. Museum specimen [p; orange label] (SAMA); 1 &amp;male;, 2 &amp;female;&amp;female; [mounted on two cards, pinned together], Cue, W.A. H.W.Brown [p; three identical labels] // Co-type [p] Formicomus dentivarius Lea W. Australia. Cotype 20634 [h; “ Cotype ” red] // S. Aust. Museum specimen [p; orange label] (SAMA). <b>Differential diagnosis.</b> <i>C. dentivarius</i> is a very conspicuous species, showing a robust body form, the rarely occuring tridentate metafemora, the reduced terminal spurs of the metatibiae, and the very distinct punctation and setation (dot-like punctures on the elytra, long erect setae). It shares most of these external characters and the same simple form of male sternite VIII and the aedeagus with the closely related <i>C. mastersii</i> from South Australia. It differs from <i>C. mastersii</i> by the more robust pronotum, by the arrangement of silvery setae on the elytral bands (cf. Figs 94, 160), by the heterogeneous setation of the legs (stiff and long setae of metatibiae, Fig. 96), by the narrow and apically rounded prongs of male sternite VIII (cf. Figs 98, 162), and by the pointed and less narrowed/elongated apex of tegmen in ventral view (cf. Figs 101, 165). <b>Distribution.</b> Australia (Western Australia).
description: Published as part of <i>Kejval, Zbyněk, 2009, Taxonomic revision of the genus Chileanthicus Werner (Coleoptera: Anthicidae) 2180, pp. 1-82 in Zootaxa 2180 (1)</i> on pages 40-42, DOI: 10.11646/zootaxa.2180.1.1, http://zenodo.org/record/5313537
description: {"references": ["Lea, A. M. (1922) On Australian Anthicidae (Coleoptera). Proceedings of the Linnean Society of New South Wales, 47, 471 - 512."]}