Naddia argentifer, De, 2014

De, G., 2014, The genus Naddia in Borneo (Coleoptera: Staphylinidae: Staphylininae), Linzer biologische Beiträge 46 (2), pp. 1737-1765 : 1756-1757

Naddia argentifer nov.sp.

(Figs 14, 14a, 14al)

Holotype & 1 Paratype: INDONESIA, Borneo, Kalimantan Tengah, Busang/Rekut confl. 0˚03’S 113˚59’E, Flight Intercept FIT 6, Brendell / Mendel, August 2001, Barito Ulu 2001, BMNH(E) 2001-191 (holotype in NHML; paratype in RCO).

Description: Proportions of holotype: length: 17.5 mm; length of head: 2.3; total length of head: 3.0; breadth of head: 3.1; length of eye: 0.9; length of temple: 1.5; length of antenna: 3.7; length of pronotum: 2.8; breadth of pronotum: 2.9; length of elytron: 3.6; breadth of elytra: 3.6. Habitus: fig. 14.

Eyes small, slightly smaller than those of N. calcicola . Antennae similar to those of the latter: antennomeres 1-3 slightly elongate, 4 subquadrate, 5 globose, 6-10 increasingly transverse, only 9 and 10 very slightly asymmetrical.

Integument entirely black, including apices of tergites VII and VIII. Antennae and legs black.

Disc of head and frons with only a very few long, very fine pale hairs; post-ocular area with short stouter silvery hairs in addition to a few black setae; pronotum similarly pubescent, with only a few silvery hairs on sides and with numerous long dark setae on lateral margins. Elytra without lateral patch of coloured pubescence, but only sparse, scattered shor silvery hairs, especially near sides and some long black setae on lateral margins. Pubescence of abdominal tergites similar to that of the two preceding species, but the antero-lateral patches of coloured pubescence is silvery, not brassy.

Puncturation of fore-body coarser than in N. brendelli and N. oxoniensis , that of elytra homogeneous, without a lateral area (corresponding to the patches of brassy pubescence in N. brendelli and N. oxoniensis ) of larger and sparser umbilicate punctures. Puncturation of abdominal tergites sparser, composed of punctures of unequal sizes, the surface therefore more shiny than in those species.

Male: sternite VII unmodified; sternite VIII with a very small shallow emargination; aedoeagus: figs 14a, 14al, the apex if median lobe deeply excavate dorsally; ventral extension of basal sclerite broad, much wider than long, the anterior margin irregularly excavate; paramere of greater than average length but still very transverse, about 3 times broader than long, the anterior margin broadly and shallowly concave.

For comparisons with N. calcicola see descriptions above. The most conspicuous difference is that all coloured pubescence in N. argentifer is silvery, with no brassy hairs or setae.