Lanurgus xylographus Schedl, 1962

Jordal, Bjarte H., 2021, The mainly South African genus Lanurgus revised (Coleoptera, Scolytinae), Zootaxa 5027 (1), pp. 87-106 : 92

Lanurgus xylographus Schedl, 1962

( Figs 4, 7, 11, 12 , 66, 67 )

Lanurgus oleaeformis Schedl, 1970 (syn. by Beaver 2011)

Type material. Holotype, female: South Africa, Cape Prov., Alexandria [ PPRI] (not examined) . Holotype, female of L. olaeiformis : South Africa, Grootvadersbos, J.H. Grobler, 17.2.1958, Ac. X. 862 [ NHMW] .

Diagnosis, female. Length 2.5–3.2 mm, 2.0–2.2 × as long as wide, colour black; scapus triangularly extended dorsally with a long tuft of golden setae; frons concave, densely covered by fine setae which increase in length towards margins; eyes separated above by 3.4–3.6 × their width; scutellum shiny, with few hair-like setae; interstriae 1–3 and 9 with two irregular rows of erect setae; protibiae with 4 or 5 apical denticles. Male similar to female except frons narrowly impressed just above epistoma, more deeply so near lateral margins forming two shallow cavities with short setae; fewer setae on scapus.

Distribution: South Africa.

New records. South Africa, Western Cape: 8 km N Hoekwil, Woodville [GIS: -33.933, 22.639], B. Jordal, leg., 1.xi.2006 #2, ex Olea capensis ; Knysna, Diepwalle [GIS: -33.957, 23.152], B. Jordal, leg., 3.xi.2006 #1, ex Olea capensis ; Knysna, Goudveld, Krisjan-se-Nek [GIS: -33.913, 22.948], B. Jordal, leg., 5.xi.2006 #5, ex Olea capensis . Eastern Cape: Hogsback [GIS: -32.587, 26.936], B. Jordal, leg., 16.xi.2006 #3, ex Olea capensis ; Kologha Forest, W. Stutterheim [GIS: -32.535, 27.371], B. Jordal, leg., 18.xi.2006 #5, ex Olea capensis ; Tsitsikamma, Goesa walk [GIS: -33.983, 23.887], B. Jordal, leg., 12.xi.2006 #3, ex Olea capensis .

Biology. Breeds under very thick bark of black ironwood, Olea capensis (Oleaceae) . Recently fallen trees and branches with diameters between 2–40 cm were colonized. Tunnels are initiated by a male and thereafter the male is joined by one or two females in a flexible bigamous mating system. Females cut longitudinal tunnels, lay their eggs in deep pits, and the hatched larvae cut their feeding tunnels across the grain of the phloem. Broods ranged from 20–40 (n=25) in a branch 8 cm thick, and 25–50 (n=13) in a trunk 40 cm in diameter. Males stayed at least until pupation of larvae.

Figures

FIGURES 2–12. Dorsal, lateral and frontal view of Lanurgus oleae female lectotype (2, 5, 8), Lanurgus podocarpi female (3, 6, 9) and male (10), Lanurgus xylographus male (4, 7, 12) and female (11).

FIGURES 66–71. Proventriculus and male aedeagus of Lanurgus xylographus (66, 67), Lanurgus podocarpi (68, 69), Lanurgus longipilis (70, 71).