Frischianus serratispinatus Frisch, sp. nov.

(Figs 130–132, 213)

Type specimen: Holotype ♂, Malaysia, Sabah, Lahad Datu: Ulu Segama (Danum Valley Forest Reserve), (04°57'N, 117°48'E), 200 m, 3.–5.XI.2005, leg. Mann, Slade & Villanueva (HECO).

Description: Habitus cf. Fig. 51. Macrophthalmous, macropterous with palisade fringe of abdominal tergite VII. Body color reddish medium brown with head and posterior half of elytra slightly darker brown; tip of abdomen, antennae, palps, andlegsyellowbrown.Labraldenticulation type 1 (Fig. 10). Forebody surface microsculpture type 2 (Fig. 2), but pronotal and elytral punctation somewhat coarser than in Figs 2b, 2c. Sutural elytral row of punctures impressed anteriorly, extending over anterior 0.7 of elytral sutural length; medial and lateral elytral row of punctures reduced to few, widely spaced punctures. Total body length 3.1 mm; forebody length 1.6 mm.

Male: Abdominal sternite VII without diagnostic characters. Abdominal sternite VIII with narrow triangular, medioposterior incision with slightly concave lateral margins, occupying roughly 0.3 of sternite length (Fig. 213).

Aedeagus (Figs 130–132) with apical lobe strongly narrowed basally to about sinistral fourth of distal aedeagal width (Fig. 131); apical lobe long and slender, occupying almost half of aedeagal length, in lateral view evenly curved ventrad and gradually tapered toward distad curved tip (Fig. 130); in ventral view, apical lobe narrow, projecting sinistrally over distal process of endophallic sclerite, in distal half somewhat dextracurved and gradually tapered toward thin apical end with tiny, subapical, dextrolateral tooth (Fig. 131). Endophallus in ventral and dorsal view with base inserted medially in aedeagus (Figs 131, 132); endophallic sclerite and dorsal endophallic spine strongly lengthened and considerably projecting from ostium (Figs 130–132). Endophallic sclerite with distal process slightly curved ventrad (Fig. 130); distal process of endophallic sclerite, in dorsal view, long subrectangular, in proximal portion somewhat dextracurved, then narrowed toward sinistracurved distal portion bearing distolaterad pointing sinistroapical tooth, distad pointing dextroapical tooth, and ventrad pointing subdextroapical tooth (Figs 130–132). Dorsal endophallic spine long, evenly curved ventrad, with strongly serrate ventral margin and more finely serrate dorsal margin gradually tapered toward very slender, acute, more strongly ventrad curved apical end (Fig. 130), in dorsal view evenly, moderately curved sinistrad (Fig. 132). Dorsal, midlongitudinal split of phallobase type A (cf. Figs 36–38). Aedeagus with ventral margin between postforamen and apical lobe straight (Fig. 130), in dorsal view long oval with straight lateral margins (Fig. 132). Length of aedeagus 0.53 mm.

Female unknown.

Distribution: Frischianus serratispinatus is native to northeastern Borneo and was collected in the Danum Valley in eastern Sabah, Malaysia.

Etymology: The epithet serratispinatus [adjective, Latin, composed of the adjectives serratus (serrate) and spinatus (indicating a feature of the species related to the spine)] refers to the serrate dorsal endophallic spine of the aedeagus (Fig. 130).

Remark: A ♂ and a ♀ of Frischianus from the Tawau Hills [Malaysia, Sabah, Tawau (4°24.009'N, 117°53.412'E), 5.IX.2009, leg. Floren (NHMW)], which is situated only about 60 km south of the type locality of S. serratispinatus, might be conspecific according to the basically comparable structure of the aedeagus (Figs 133–135). Nevertheless, the aedeagus of the ♂ from Tawau differs by the straight, not dextracurved distal portion of the apical lobe, the almost edentate dorsal endophallic spine, which is only weakly dentate basally, and the distolaterad pointing dextroapical tooth of the endophallic sclerite. More material is necessary to answer the question of whether the specimens from the Tawau Hills and the Danum Valley Forest Research represent different species or just intraspecific variations.