Naddia limbifer, De, 2014

De, G., 2014, The genus Naddia in Borneo (Coleoptera: Staphylinidae: Staphylininae), Linzer biologische Beiträge 46 (2), pp. 1737-1765 : 1747-1748

Naddia limbifer nov.sp.

(Figs 5, 5a, 5al)

Holotype, 1 & 2 paratypes: MALAYSIA, Sabah, Lahad Datu, Ulu Segama For. Res. Danum Valley Forest Centre , 04˚57.9’N 117˚48.1’E, 200 m alt. xi.2005, 1˚ Forest, FIT, coll. Mann, Slade & Villanueva, OUMNH-2006-051 (in OUMNH; 1 paratype in LL); 1 paratype: MALAYSIA, Sabah, Lahad Datu, Ulu Segama For. Res. Danum Valley F.C., 04˚57.9’N 117˚48.1’E, 200 m alt. 03-13.xi.2005, 1˚ Forest, coll. Mann, Slade & Villanueva, Flight Interception Trap, Lowland, mixed Dipterocarp Frst West trail N5, OUMNH-2005-051 (in OUMNH); 2 & 1 paratypes: SABAH: Danum Valley , B.R.L, f.i.t., 14-16.II.2007, G. de Rougemont (in RCO).

Additional material 1: MALAYSIA, Sabah, Maliau Basin Conservation Area , Nature Trail, N 4˚44.609’ E116˚58.416’, 23-24.iii. 2011, 220m amsl, coll. Mann, Flight Interception Trap, DJM Ref: B04 FIT, Old growth forest, OUMNH 2011-043 ; 1: Malaysia, Sabah, ca. 25 km S Sapulut, Batu Punggul env. Primary forest , intersept (sic.) trap, 23.5.2001, J. F. Kočiam (sic.) lgt. (in NHMW) ; 1: MALAYSIA, Sabah, Tawau, 16-24.ii.2012, 4.76N 117.54E, 399 m Alt. , Coll. C.L. Gray, SAFE project area, F.I.T Riparian forest strip in oil palm, OUMNH-2013-056 ; 1: INDONESIA, Borneo, Kalimantan Tengah, Busang / Rekut confl. 0˚03’S 113˚59’E, Flight Intercept FIT 9, Brendell / Mendel , August 2001, ‘ Barito Ulu 2001’, BMNH(E) 2001-191 (in NHML)

Description: Proportions of holotype: length: 21 mm; length of head: 2.6; total length of head: 3.1; length of eye: 1.1; length of temple: 1.5; length of antenna: 4.6; length of pronotum: 3.3; breadth of pronotum: 2.9; length of elytron: 4.0; breadth of elytra: 4.2. Habitus: fig. 5.

Antennomeres 1-5 elongate, 6 and 7 about as long as broad, 8-10 transverse, asymmetrical; 11 apex of segment 11 broadly rounded, not acuminate; terminal segments with conspicuous silvery pubescence.

Integument black, except apical margin of abdominal segment VII and entire segments VIII and IX reddish brown; mouthparts, antennae and legs entirely black. Pubescence of head and pronotum dark; pubescence of elytra likewise dark except on lateral margins and postero-lateral angles which bear very short pale reddish hairs, and most noticeably an entire fringe of long yellowish hairs on the apical margins. Pubescence of abdominal tergites mostly dark, except on apical 1/3rd of tergites VI and VII and entire tergites VIII and IX, where it is longer and reddish; sides of fore-body and postero-lateral angles of tergites bearing long dark setae; legs, especially inner faces of mesotibiae, with dense reddish pubescence; tarsomeres, especially of protarsi, fringed with reddish pubescence.

Sculpture of head, fairly close and fine, as in most Naddia with discrete umbilicate punctures along base and on temples, the interstices elsewhere coalescing to form elongate rugae, but less regular and less parallel than in other species; sculpture of pronotum homogeneous, composed of very close and not very large umbilicate punctures without or with scarcely any trace of an impunctate mid-longitudinal band; sculpture of elytra characteristic, very dense, rugose near anterior margins, on either side of suture and near posterior margins, the disc of each elytron each with a large area of widely spaced umbilicate punctures, the interstices equal to or broader than diameter of punctures and deeply wrinkled and furnished with very short silvery pubescence directed outwardly, the whole areas appearing silvery, in sharp contrast to the surrounding sculpture; puncturation of abdominal tergite III fine and dense, sparser and coarser on segments IV and V, very sparse on segments VI and VII, the very broad interstices of these last two with dense micro-sculpture making the surface dull.

Male: sternite VII unmodified; sternite 8 with a very small shallow emargination; sternite 9 with rounded apical emargination and blunt, broadly rounded apico-lateral angles; aedoeagus: figs 5 a, 5al, the median lobe long and slender, greatly expanded into dorsally deeply excavated sub-circular apex; ventral extension of basal sclerite broad, subtruncate; paramere very short, its anterior margin evenly rounded (the pair of whitish triangular shapes overlaying it are membranous structures, not the outline of the paramere).

Variability: the single male from Kalimantan differs from the types in its marginally greater size (ca. 22 mm: 19-21 mm), slightly broader head and pronotum, and more pronounced apparent indentation of the antero-lateral margin of the pronotum; the apparently more gradually spatulate apex of the median lobe of some specimens is attributed to deformation due to contraction of the tubular median part of the median lobe in dry mounted material of the exx. from Danum valley.

This species is easily distinguished from all other Bornean species by the fringe of pale setae on the apical margins of the elytra, but at least one other continental species ( N. westermanni ER. ) has a similar fringe.