Necrobiopsis shangrila, Arias, Elizabeth T., Slipinski, Adam, Lawrence, John F. & Elgueta, Mario, 2009

Arias, Elizabeth T., Slipinski, Adam, Lawrence, John F. & Elgueta, Mario, 2009, A review of the Chilean Egoliini (Coleoptera: Trogossitidae) with description of a new species of Necrobiopsis Crowson, Zootaxa 2170, pp. 37-45 : 42-44

Necrobiopsis shangrila n. sp.

( Figs. 4–5, 7 –10)

Diagnosis: This species is easily distinguished from the Australian N. tasmanica in having prominent tibial spines and lacking the weak but more or less continuous carinae formed in alternate elytral intervals. Also, the aedeagus in N. tasmanicus has longer and narrower paramere.

Description: Length 3.5–4.1 mm. Colour brown to almost black, legs and antennae lighter; vestiture complex and consists of golden or whitish decumbent or semi-decumbent relatively dense hairs covering surfaces of head, pronotum and elytra, and long, erect, darker pointed setae situated mostly along lateral parts of head, pronotum and elytral intervals.

Head, including eyes, narrower than the width of pronotum at anterior angles; anterior clypeal margin arcuate; eyes not emarginate, rather coarsely facetted with very short and sparse interfacetal setae. Upper surfaces of head coarsely punctate, punctures contiguous and several times larger than an eye facet, interspaces densely reticulate and dull; surfaces covered by moderately dense decumbent pubescence. Antenna eight-segmented; antennal club 1.2–1.3 times as long as broad, one-segmented, bearing two external constrictions and whorls of setae but without internal division ( Fig. 5 ).

Pronotum 0.7–0.8 times as long as wide, widest at anterior third and distinctly arcuate, narrowing anteriorly and posteriorly; lateral margin complete, regularly denticulate and with fringe of long setae, without distinct bead; anterior angles rectangular, posterior ones somewhat pointed. Disc weakly convex, with shallow elongate median impression and less defined impressions laterally; surfaces entirely covered by coarse and dense tubercles bearing silvery or golden decumbent setae of somewhat variable length and thickness. Scutellum pentagonal, transverse and covered by dense silvery decumbent setae.

Elytra about 1.6–1.7 times as long as wide and 2.3–2.4 times as long as pronotum; sides parallel for most of the length with both elytra jointly rounded apically; disc somewhat flattened. Each elytron with 10 complete rows of deep, elongate and partially indistinct punctures obscured by irregular impressions (especially near apices), adpressed setae and tufts of white, semi raised setae laterally and apically adjacent to shallow impressions; elytral intervals distinctly wider that punctures, flat.

Outer edges of all tibiae with socketed spine at apical third and several socketed spines at apex ( Fig. 7 ); protibial spurs unequal, one being longer and curved. Aedeagus as in Figs. 8–9 .

Type specimens: Holotype: CHILE: VIII Region, Chillán Cordillera, Shangrila Way, 36°54.065’S / 71°30.096’W, 1190.6 m, 12.iii.2005, canopy fogging, Nothofagus dombeyi, Arias & Andrews UC Berkeley ( MNNC). Paratypes: same data as the holotype (25); VIII Region, N Las Trancas Puente Aserradero, 36°54.947’S / 071°27.417’W, 1247 m, 30.xi.2001, canopy fogging GT, Nothofagus dombeyi, Arias et al. UC Berkeley (14); Termas de Chilan Road, Refugio Andino nr. Puente el Aserradero, 36°54.947’S / 071°27.417’W, 1247 m, 30.xi.2001, canopy fogging, Nothofagus, Arias et al. UC Berkeley (11); IX Region, PN Nahuelbuta, Cañete Exit, 37°48.030’S / 73°02.009’W, 1219m, 08.i.2003, canopy fogging, Araucaria araucana, Arias et al. UC Berkeley (14); IX Region, Curacautin Icalma Mapuche site, 38º45.269’S 71º13.683’W 1129 m, 17.xii.2001 canopy fogging GT, Araucaria araucana Female & Male, Arias et al. UC Berkeley (1). Paratypes deposited in ANIC, BMNH, CAS, EMEC, MNNC, USNM. VIII Region, N Las Trancas Puente Aserradero 36º55.028’S / 071º27.069’W, 1312 m, 3.xiii.2001. Canopy Fogging GT, Nothofagus dombeyi Coigüe, Arias et al UC Berkeley (7, CSCA); VIII Region, N Las Trancas, Puente Aserradero, 36º55.028’S 071º27.069’W, 1312 m, 3.xii.2001. Canopy Fogging GT Nothofagus dombeyi Coigüe, Arias et al. UC Berkeley (12, CSCA); IX Region, Parque Nationales Villarrica, 12.xii.2003, 39°21.428'S 71°58.157'W, Fred G. Andrews, 2765 (5, CSCA). Talca Pr.: R.N. Altos del Lircay, Sendero, Laguna del Alto, 1330m, 35° 36.9'S, 17°03.7'W, 26.xii.2002. Nothofagus spp., open to dense understory, pyr.- fogging Cyttaria (Ascomycetes) fungi on large Nothofagus, Solodovnikov, Newton 1072 (7, FMNH).

Other specimens examined: CHILE: Region VIII, Termas de Chillan Road Los, Arenales 36º55.041’S / 071º26.442’W, 1.xii.2001, 4350’ (1326m), Arias et al. UC Berkeley (10, MNNC).

Etymology: the species epithet is derived from its type locality Shangrila .

Figures

FIGURES 1 – 4. Adult habitus, dorsal. 1. Acalanthis semimetallica (Fairmaire & Germain); 2. A. mirabilis Reitter; 3. A. quadrisignata Erichson; 4. Necrobiopsis shangrila sp. nov.

FIGURES 5 – 9. 5. Necrobiopsis shangrila sp. nov., antenna; 6. Acalanthis mirabilis Reitter, antenna; 7. Necrobiopsis shangrila, front tibia; 8. N. shangrila, aedeagus dorsal; 9. Same, apex of aedeagus, showing parameres.