Chileanthicus exul, Kejval, 2009

Kejval, Zbyněk, 2009, Taxonomic revision of the genus Chileanthicus Werner (Coleoptera: Anthicidae) 2180, Zootaxa 2180 (1), pp. 1-82 : 44-45

Chileanthicus exul sp. nov.

( Figs 108–111 )

Type locality. Australia, Western Australia, Barrow Island , W of Latitude Point, 20°46'32"S 115°26'30"E .

Description (male, holotype). Head and pronotum rufous; elytra yellowish brown, with darker brownish apical fourth and transverse band at about mid-length (dark marking very vaguely outlined, band somewhat paler medially); legs, antennae and palpi yellowish, with rufous tinge, antennae paler distally.

Head 1.2 times as long as wide, widely rounded to angulate posteriorly in dorsal view, somewhat flattened, with rather sharply angled margins posteriorly; tempora moderately divergent; posterior temporal angles conspicuous. Eyes medium-sized, convex, situated rather dorso-laterally above angled margins. Dorsal surface nearly matte, densely punctured ( Fig. 108 ); punctation simple, punctures rather large, shallow, nearly contiguous, evenly spaced, including median line. Setation very short, appressed, rather inconspicuous, with a few slightly longer, erect setae. Antennae only moderately enlarged in terminal third; antennomere III 1.9 times as long as wide, about as long as IV; antennomere X 1.2 times, XI twice as long as wide.

Pronotum about as long as wide, slightly wider than head, widely rounded anteriorly in dorsal view. Pronotal disc conspicuous, moderately convex, its lateral margins forming sharp edge, lateral outlines sinuously narrowing towards base in dorsal view. Dorsal surface nearly matte, densely punctured and somewhat longitudinally corrugated; punctation simple, rather evenly developed; punctures similar to those on head, only rather oval shaped. Setation as on head.

Elytra 1.7 times as long as wide, conjointly rounded apically. Surface moderately glossy, distinctly punctured; basal punctation simple, distinctly finer and sparser than that of head. Setation slightly longer than on head, appressed to subdecumbent, pale to brownish (depending on colour of surface) and evenly directing posteriad; erect setae moderately longer, sparsely scattered, somewhat more conspicuous than on head.

Metafemora unidentate ( Fig. 109 ), subapical process large, pointed, facing inner side of tibia; mesotibiae with minute denticle on inner side apically; metatibiae with apical inner margin produced into conspicuous, pointed process (similarly as in Fig. 104 ). Setation rather uniformly short, fine, appressed.

Abdominal sternum VII and tergum VII simple. Sternite VIII ( Fig. 110 ); paired prongs simply bilobed distally, sparsely setose. Tergite VIII simple, with posterior margin evenly rounded.

Aedeagus ( Fig. 111 ); apical portion of tegmen 1.3 times as long as basal-piece, strongly lobe-like dilated latero-apically, with apex moderately produced, upturned in lateral view; median lobe terminating in a pair of conspicuously long, well-sclerotized, hook-like curved projections.

Female. Externally identical to male.

Body length (♂ ♀). 2.5–2.7 mm (holotype 2.7 mm).

Type material. Holotype: ♂, WA: Barrow Island W of Latitude Point @ 20°46'32"S, 115°26'30"E ( GPS) 11 August 2002 S. M. Slack-Smith (SBI # 35) // limestone outcrop, rocks rubble, little soil // ex. spirit coll. // Western Australian Museum Entomology Reg no. 70577 ( WAM) . Paratypes: 1 ♀, same data as holotype, except: Reg no. 70576 ( WAM) ; 1 ♂, WA: Barrow Island WSW of Latitude Point @ 20°46'51"S, 115°26'28"E ( GPS) 11 August 2002 S. M. Slack-Smith (SBI # 25) // mostly limestone and rocks, little soil // ex. spirit coll. // Western Australian Museum Entomology Reg no. 70578 ( WAM) .

Differential diagnosis. C. exul sp. nov. is undoubtedly the sister species of C. discus sp. nov., differing by the dense punctation of the head ( Fig. 108 , similar to that on pronotum), and by the form of the tegmen apex, which is dilated, widely rounded and only slightly produced medially (cf. Figs 11 , 107 ).

Etymology. From Latin exul (exile, deportee); named in reference to its isolated island occurrence. Distribution. Australia (Western Australia).

Figures

FIGURES 102–111: Chileanthicus discus sp. nov., male, holotype: 102, body form and punctation of head (top) and pronotum (bottom); 103, metafemur; 104, apex of metatibia; 105, sternite VIII; 106, segment IX (spiculum); 107, aedeagus in ventral (right) and lateral (left) view; C. exul sp. nov., male, holotype: 108, punctation of head; 109, metafemur; 110, sternite VIII; 111, aedeagus in ventral (left) and lateral (right) view. Scale (1.0 mm): A, 102; B, 103, 109; (0.5 mm): B, 104, 107, 111; C, 106; D, 105, 110.

FIGURES 9–16: Chileanthicus acutipennis sp. nov., male, holotype: 9, sternum VII; 10, sternite VIII (half), dorsal view; 11, sternite VIII, lateral view; 12, aedeagus, ventral (left) and lateral (right) view; C. baculentus sp. nov., male, holotype: 13, sternum VII; 14, sternite VIII (half), dorsal view; 15, sternite VIII, lateral view; 16, aedeagus, ventral (right) and lateral (left) view. Scale (0.5 mm): A, 9, 12; B, 10, 11, 13–15; C, 16.