Description of holotype (Figs 1-3, 5-6). Body 12.8 mm long; head and pronotum dark brown to almost black, scutellum, elytra and pygidium lighter brown, venter and legs dark red-brown, palps and antennae yellow-brown, all surfaces dull and not iridescent. Mentum shield-shaped, narrowing towards the apex, anterior margin slightly indented in the middle with ligula just visible in indentation, surface with scattered punctures and a few long setae on lateral margins, labial palps with terminal palpomere about as long as preceding palpomere and with apex pointed, concave dorsally, convex laterally. Mandibles visible at sides of labium, maxillary palps with 3 equally long palpomeres. Antennae with 9 antennomeres, club of 3 long (1.4 mm) lamellae curved posteriorly at about half length and as long as antennomeres 1-6 combined, antennomere 1 about as long as antennomeres 2-6 combined and very swollen towards apex, antennomere 2 swollen, antennomeres 5 and 6 plate-like. Labrum not visible from above, separate from clypeus, anterior margin not reflexed but rounded back to a small tubercle on each postero-lateral point, posterior sloping back into mouth cavity, indistinct transverse declivity close to anterior margin, surface with a few indistinct punctures in the middle. Clypeus with anterior face half as short in middle as at the side, lateral thirds with long setae arising from prominent punctures, middle third with a row of shorter setae across the middle; upper surface with anterior outline broadly rounded, with no slight concavity in the middle, densely punctured, each puncture with a microseta; clypeofrontal suture distinct, concave in middle and forming a very flattened M shape. Frons with punctures each containing a microseta, less dense than on upper clypeus, 3 long setae on apex of each ocular canthus, without a ridge close to clypeofrontal suture. Pronotum with shallow punctures on disc each containing a microseta and less dense than on frons, 2-3 long setae in anterior part of lateral margin, disc with trace of median longitudinal depression on posterior half, widest at base, ratio greatest width to middle length 1.8:1, anterior margin without long setae and defined by a groove from side to side, posterior margin defined by a groove but margin overhung by posterior disc, lateral margin defined by groove that is not expanded towards anterior angles, anterior angles acute, posterior angles obtuse. Scutellum triangular with apex rounded, slightly shagreened with a few punctures each containing a microseta. Elytra with striae punctured, grouped in pairs, adjacent intervals unequal width, each puncture containing a microseta; epipleurae thin, not extending to apices of elytra, with scattered stout setae. Wings fully developed. Propygidium glabrous. Pygidium with shallow scattered punctures each containing a microseta, latero-posterior margin with fine, long setae. Prosternal-hypomeral suture on each side of prosternum not marked by ridge. Tarsomeres without pads or tufts of yellow setae beneath, with a few sparse short brown spines; tarsal claws without a tooth on the concave side and without pulvilli. Anterior tibia with 2 teeth on outer edge in addition to apical point, basal tooth small and at about half length of tibia, distal tooth large and set close to apical point. Lateral margins of posterior coxae produced into a narrow flange in posterior half. Posterior femora without a row of larger punctures parallel to posterior edge. Apical spurs of posterior tibia placed one on each side of the articulation; posterior tibiae slender, length to width at apex 4:1. Tergite and ventrite of penultimate abdominal segment separated by a suture on each side, suture glabrous. Abdominal ventrites with scattered setae in a band across each ventrite; final segment with a low transverse ridge just before indentation of posterior edge. Aedeagus with parameres symmetrical (Fig. 5), resembling a duck’s head in lateral view (Fig. 6).

Female (Fig. 4). Similar to male except: antennal club 0.9 mm long; without an indentation on posterior edge of final abdominal segment.

Variation. Body length 12.6-12.9 mm. Some specimens have the head and pronotum lighter in colour (Fig. 4), presumably reflecting their teneral condition.

Open-access, online, rapid taxonomy ISSN: 2653-4649 (Online)

Australian Journal of

Taxonomy

Open-access, online, rapid taxonomy
ISSN: 2653-4649 (Online)