Lichniini Burmeister, 1844

Hawkins, Shauna Joy, 2006, A revision of the Chilean tribe Lichniini Burmeister, 1844 (Coleoptera: Scarabaeidae: Melolonthinae), Zootaxa 1266 (1), pp. 1-63 : 15

Tribe Lichniini Burmeister, 1844

Lichniadae Burmeister 1844: 8 (original spelling).

Type genus. Lichnia Erichson, 1835 .

Diagnosis

Length 4.0–8.0 mm. Color of body surface variable (red, brown, black). Body surface setose; setae often dense, color variable (black, brown, gray, tan, yellow, white). Head strongly deflexed. Labrum clearly visible in dorsal view, on the same plane as clypeus, fused to clypeus; clypeolabral suture distinct. Mandibles expanded, reflexed, produced beyond apex of labrum. Maxillae with greatly elongate, setose galea. Maxillary palpi 4­ segmented. Labium deeply grooved longitudinally. Labial palpi 3­segmented. Eye completely divided into dorsal and ventral sections by a complete canthus. Antennae 9­ segmented with 3­segmented club. Antennal club shape elongate; never cupuliform; never with smaller, apical segments fitting into larger, basal segments. Elytra short, exposing pygidium. Pygidium flat, apex perpendicular to body, not elongate or protruding from body. Abdomen with 7 exposed, fused sternites. Pleural membrane either with 8 pairs of spiracles ( Lichnia ) or pleural membrane with 6 pairs of spiracles and tergite with 1 pair of spiracles ( Arctodium ). Legs with metatibia with apical projection variable (see Fig. 8 ). Mesotarsome 1 and metatarsomere 1 longer than mesotarsomere 2–4 combined and metatarsomere 2–4 combined respectively. Metatarsal articulation set so movement passes between tibial spurs, tibial spurs set widely apart with lower spur set on the rim of tibial apex and the other set within the cone of the tibial apex (in the internal apical notch). Claws simple, with weak basal lobe, capable of lateral movement. Male genitalia with robust, paired parameres; parameres approximately equal in length to phallobase; genitalia without scleritized capsule or scleritized whip­like structure.

Figures

FIGURES 8a–d. Metatibial apex showing apical spine (arrow) and adjacent spur. a) Arctodium planum male; b) A. mahdii male; c) A. vulpinum male; d) A. vulpinum female.