Naddia brendelli, De, 2014

De, G., 2014, The genus Naddia in Borneo (Coleoptera: Staphylinidae: Staphylininae), Linzer biologische Beiträge 46 (2), pp. 1737-1765 : 1754-1755

Naddia brendelli nov.sp.

(Figs 11, 11a, 11al.)

Holotype and 5 Paratypes: 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); 1 & 1 Paratypes: ibid., but "FIT 7"; 1 Paratype: ibid., but "FIT 4". (holotype and 7 paratypes in NHML; 1 paratype in RCO).

Description: Proportions of holotype: Length: ca. 16 mm; length of head: 2.4; total length of head: 3.0; length of eye: 1.0; length of temple: 1.6; length of antenna: 4.0; length of pronotum: 3.2; breadth of pronotum: 2.8; length of elytron: 3.5; breadth of elytra: 3.5. Habitus: fig. 11.

Occipital area of head deeply excavate; eyes prominent, much shorter than temples. Antennomeres 1-7 short, decreasingly elongate; 8-10 increasingly transverse, only 9 and 10 slightly asymmetrical.

Integument black except very narrowly brownish along posterior margins of elytra; posterior ¼ of abdominal segment VII and whole of segment VIII reddish brown; antennae and legs dark brown; sparse ground sculpture of head pale, very fine and erect on disc; anterior margin with a conspicuous fringe of paler, almost brassy setae directed anteriorly; posterior 1/3rd and sides of head up to hind margin of eyes with long, fairly dense forwardly directed pale brassy setae (the body may have to be tilted slightly forward under the light to see these); pubescence of pronotum very sparse, almost invisible on disc, composed of very fine erect pale hairs, like those of head; sides with numerous long and shorter black setae; pubescence of greater part of elytra like that of pronotum, the sides and posterior margins with long and shorter black setae; each elytron with a broad crescentic area of short, outwardly directed brassy setae under which the umbilicate punctures are larger and more widely spaced than on the rest of surface; abdominal tergite III with very fine outwardly directed pale brassy hairs in the middle of tergite, and short brassy hairs on the sides and on paratergites; tergites IV-VI with long recumbent black hairs in the middle and antero-lateral patches of brassy hairs like those of tergite III of decreasing extent; paratergites with a few (many often broken off) long black setae on paratergites; posterior margins of tergites with a fringe of long fine setae; tergite VII with sparse but conspicuous outwardly directed silvery pubescence in anterior 1/3rd; posterior 2/3rd with sparse, erect long black setae on centre and fine brassy setae on sides; tergite VIII with only long erect pale setae.

Sculpture of fore-body as in most Naddia spp. , but punctures relatively finer and denser than in the similar N. oxoniensis , homogenous on pronotum which shows scarcely any trace of a mid-longitudinal line (with a short narrow shiny callus near anterior and posterior margins in N. oxoniensis ); sculpture of abdominal tergites similar to N. oxoniensis , but also finer and denser.

Male: sternite VII modified; sternite VIII not emarginate; sternite IX deeply emarginate; aedoeagus: figs 11a, 11al, in ventral view the median lobe evenly dilated distally, the apex evenly rounded; in lateral view the median lobe is slightly curved dorsad; ventral extension of basal sclerite indistinct (the deeply bifurcate structure visible in the illustration does not seem to be the outline of the sclerite); paramere very short, indiscernible in ventral view, visible in lateral view.

For other comparisons with the similar species N. oxoniensis see description of the latter, below.

Derivation of specific name: after Martin Brendell, former curator of Coleoptera at the Natural History museum in London.