Chileanthicus pubifasciatus ( Lea, 1922 ) Kejval, 2009

Kejval, Zbyněk, 2009, Taxonomic revision of the genus Chileanthicus Werner (Coleoptera: Anthicidae) 2180, Zootaxa 2180 (1), pp. 1-82 : 66-67

Chileanthicus pubifasciatus ( Lea, 1922) comb. nov.

( Figs 183, 184 )

Formicomus pubifasciatus Lea, 1922: 504 .

Type locality. Australia, Western Australia, Cue , 27°27'S 117°53'E .

Redescription (female, holotype). Head and pronotum dark red rufous, head darkened on frons and clypeus; elytra brown black with slight bronze reflection, nearly unicoloured, with very slight indication of small paler transverse band/spot in apical half; legs, antennae and palpi unicoloured rufous.

Head 1.1 times as long as wide; widely rounded posteriorly; tempora subparallel, posterior temporal angles rather distinct. Eyes small to medium-sized, moderately convex. Dorsal surface rather matte, largely densely punctured ( Fig. 183 ); punctation simple, with indication of sparsely punctured, glossy median line, especially anteriorly on frons. Setation pale to whitish, very short, subdecumbent; erect setae indistinct. Antennae moderately enlarged in terminal third; antennomere X 1.7 times, XI 2.2 times as long as wide.

Pronotum slightly longer than wide, as wide as head including eyes, widely rounded anteriorly; pronotal disc moderately convex, its lateral margins forming rounded, but distinct edge, lateral outlines nearly straightly narrowing towards base; with indication of slight median impression dorsally before base. Dorsal surface matte; punctation similar to that on head, rather evenly dense. Setation as on head

Elytra 1.8 times as long as wide, conjointly rounded apically. Surface slightly glossy, densely punctured; basal punctation simple, much finer than on head, punctures (especially along suture) often contiguous and serial, arranged in transverse to oblique rows and these seem to be separated by fine wrinkles ( Fig. 183 ). Setation pale to whitish (see Remarks), somewhat longer than on head, subdecumbent, setae rather evenly directing posteriad, moderately swirled at place of paler spot/band; erect setae indistinct.

Metafemora unidentate ( Fig. 184 ), subapical process small, pointed, facing inner side of tibia; all tibiae simple.

Both sternum and tergum VII simple.

Body length (♀). 4.1 mm.

Type material. Holotype: ♀, pubifasciatus Lea , TYPE Cue [p+h] // Formicomus pubifasciatus Lea W. Australia TYPE.15265 [h; “TYPE” red] // S. Aust. Museum specimen [p; orange label] ( SAMA).

Differential diagnosis. C. pubifasciatus differs from most Australian species by the combination of unidentate metafemora, rather rounded (not sharp) lateral margins of the pronotal disc, and the dark unicolourous, simply and finely punctured elytra. Within the group of species showing these characters (or similar conditions), it can be recognized by the form of the pronotum (nearly trapezoidal in dorsal view), the rather distinct and simple punctation of the head and pronotum, and by the serial arrangement of punctures in the basal half of the elytra (surface appears to be transversely wrinkled).

Distribution. Australia (Western Australia).

Remarks. Lea (1922) described the elytra of C. pubifasciatus as unicolourous and having “two interrupted fasciae of white pubescence: one at the basal third, the other at the apical third”. In the holotype examined, these setose bands are now almost completely abraded and indistinct, except for small patches of moderately swirled whitish setae in the apical third.

Figures

FIGURES 183–191: Chileanthicus pubifasciatus (Lea), female, holotype: 183, body form and punctation of head (top) and elytra (bottom); 184, distal part of metafemur; C. pulcher sp. nov. (female, holotype): 185, body form and punctation of head (top) and elytra (bottom); 186, metafemur; C. pumilio sp. nov., male, holotype: 187, body form and punctation of head (top) and elytra (bottom); 188, antenna; 189, metafemur; C. mastersii (King), South Australia (SAMA, ANIC): 190, metafemur; 191, apex of tegmen and median lobe of aedeagus in ventral view. Scale (1.0 mm): A, 183, 185; B, 187; (0.5 mm): B, 186, 187; C, 190; D, 184; E, 189.