Chileanthicus paganus, Kejval, 2009

Kejval, Zbyněk, 2009, Taxonomic revision of the genus Chileanthicus Werner (Coleoptera: Anthicidae) 2180, Zootaxa 2180 (1), pp. 1-82 : 65-66

Chileanthicus paganus sp. nov.

( Figs 177–182 )

Type locality. Australia, South Australia, 28 km SW of Mabel Creek Homestead.

Description (male, holotype). Head dark brown to nearly brown black, somewhat paler anteriorly; pronotum rufous brown to brown, darkened antero-laterally; elytra brown, with two, paired, transverse yellowish bands, widely interrupted on suture ( Fig. 177 ); the anterior band moderately widened laterally, the posterior one rather evenly narrow; legs rufous, antennae and palpi dark rufous brown.

Head 1.2 times as long as wide, nearly widely rounded posteriorly; tempora subparallel, slightly narrowing posteriad; posterior temporal angles rounded, less distinct. Eyes small, convex. Dorsal surface at most slightly glossy, densely punctured ( Fig. 177 ); punctation double, but difference between punctures less distinct; punctures rather evenly spaced, slightly sparser medially, glossy median longitudinal line indistinct. Setation short and fine, subdecument; erect setae sparsely scattered and inconspicuous. Antennae only slightly enlarged in apical third; antennomere III 2.1 times as long as wide, as long as IV; antennomere X 1.6 times, XI 2.3 times as long as wide.

Pronotum 1.1 times as long as wide, moderately wider than head including eyes, rounded anteriorly in dorsal view. Pronotal disc distinct, somewhat flattened mesally, its lateral margins forming rounded edge (rather distinct close behind the widest point of pronotum), lateral outlines slightly sinuously narrowing towards base in dorsal view. Dorsal surface nearly matte, densely and evenly punctured; punctation similar to that on head. Setation as on head.

Elytra 1.9 times as long as wide, conjointly rounded apically. Surface only moderately glossy, rather densely punctured ( Fig. 177 ); basal punctation simple, sparser and finer than on head. Setation moderately longer and sparser than on head, subdecumbent, mostly brownish, rather evenly directed posteriad; setae on paler markings pale to whitish, moderately obliquely directed; erect setae short and sparsely scattered, inconspicuous.

Metafemora unidentate ( Fig. 178 ); subapical process comparatively small, narrowed and pointed apically, obliquely projecting, facing inner side of tibia. Mesotibiae with apical inner margin produced into minute denticle. Setation uniformly short and fine; metatibiae in addition with a tuft of several long, bristle-like setae on inner side apically ( Fig. 179 ).

Both sternite and tergite VII simple. Sternite VIII ( Fig. 180 ); paired prongs arcuately curved mediad, widened and only sparsely setose distally. Tergite VIII simple, with posterior margin evenly rounded apically. Segment IX (spiculum) as in Fig. 181 .

Aedeagus ( Fig. 182 ); apical portion of tegmen 2.1 times as long as basal-piece, narrow, simple, pointed apically; median lobe of aedeagus with simple, membranous apex.

Female. Unknown.

Body length (♂ ♀). 3.6–4.4 mm (holotype 4.4 mm).

Type material. Holotype: ♂ [originally pinned], SA 28 km SW Mabel Ck H.S. Oct. 1984 P.G. // ANTHICIDAE // S.Aust. Museum specimen ( SAMA) . Paratype: ♂ [pinned], same data as holotype, but “ Anthicidae ” handwritten on the 1st label ( SAMA) .

Differential diagnosis. C. paganus sp. nov. seems to be close to C. insignis sp. nov. and C. melasomus as is suggested by the similar form of male sternite VIII (cf. Figs 180, 174 and 137 ). It differs from both species by the somewhat more robust appearance (wider head and especially the pronotum), simple punctation of the elytra (see variability in the latter two species), smaller subapical process of the metafemora (cf. Figs 178, 172 and 136 ), simple apex of the metatibiae with a tuft of longer stiff setae (apex with small process in C. melasomus , simply shaped and lacking tufted setae in C. insignis sp. nov.), and by the detailed morphology of the tegmen apex and median lobe of the aedeagus (cf. Figs 182, 176 and 140 ).

Etymology. From Latin paganus (homesteader), named in reference to the location of the type locality (near Mabela Creek Homestead).

Distribution. Australia (South Australia).

Figures

FIGURES 171–182: Chileanthicus melasomus (Lea), male, South Australia (ANIC): 171, body form and punctation of head (top) and elytra (bottom); 172, metafemur; 173, apex of metatibia; 174, sternite VIII; 175, aedeagus in ventral view; 176, apex of aedeagus in ventral (right) and lateral (left) view; C. paganus sp. nov., male, holotype: 177, body form and punctation of head (top) and elytra (bottom); 178, metafemur; 179, apex of metatibia; 180, sternite VIII; 181, segment IX (spiculum); 182, apex of aedeagus in ventral (right) and lateral (left) view. Scale (1.0 mm): A, 171, 177; B, 172, 175, 178; (0.5 mm): B, 173, 174, 179; C, 181; D, 176, 182.

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.