Frischianus echinatospinatus Frisch, sp. nov. (Figs 124–126, 210) Type specimen: Holotype ♂, Malaysia, Sabah, Sandakan: Sepilok, X.1996, leg. Chung (NHML). Description: Habitus (Fig. 50). Macrophthalmous, macropterous with palisade fringe of abdominal tergite VII. Body color unicolored light reddish brown; tip of abdomen, antennae, palps, and legs yellow brown. Labral denticulation type 4 (cf. Fig. 15), but in comparison with closely related species probably non-species-specific, individual variation. Forebody surface microsculpture type 1 (Fig. 1). Elytral rows of punctures long and distinct, extending over anterior 0.7 of elytral sutural length; sutural row of punctures not much impressed. Total body length 3.1 mm; forebody length 1.9 mm. Male: Abdominal sternite VII without diagnostic characters. Abdominal sternite VIII with narrow triangular, medioposterior incision with slightly concave lateral margins, occupying about 0.3 of sternite length (Fig. 210). Aedeagus (Figs 124–126) with apical lobe situated in sinistral six-seventh of distal aedeagal width (Figs 125, 126); apical lobe long, occupying half of aedeagal length, in lateral view slender, somewhat curved ventrad, in about apical fourth evenly tapered toward distad curved, acute end (Fig. 124), in dorsal view broad, evenly curved dextrad, and gradually tapered toward abruptly narrowed, slim, acute apical end (Fig. 126). Endophallus in dorsal view with base inserted subsinistrally in aedeagus, with endophallic sclerite and dorsal endophallic spine considerably projecting from ostium (Fig. 126). Endophallic sclerite extended in long, narrow spine almost reaching apical end of dorsal endophallic spine, in lateral view straight and gradually narrowed toward acute apical end (Fig. 124); endophallic sclerite in dorsal view from sinistral, weakly sclerotized base aligned dextrodistad, running dextrally of dorsal endophallic spine, and with tip somewhat curved sinistrad (Fig. 126). Dorsal endophallic spine with ventrad curved, furcate base (Figs 124, 126), in distal half densely studded with laterodistad directed spinules/denticles (echinate, spinulate) except for short, acute, inechinate apical end, in lateral view thin and straight (Fig. 124), in dorsal view feebly inverted Sshaped with echinate portion somewhat widened (Fig. 125). Dorsal, midlongitudinal split of phallobase type A (cf. Figs 36–38). Aedeagus with ventral margin between postforamen and apical lobe straight (Fig. 124), in dorsal view long oval, subparallel with lateral margins weakly, equally curved (Fig. 126). Length of aedeagus 0.43 mm. Female unknown. Distribution: Frischianus echinatospinatus is known only from northern Borneo, where it was discovered near Sandakan in the northeast of Sabah, Malaysia. Etymology: The epithet echinatospinatus [adjective, Latin, composed of the adjectives echinatus (spiny, thorny, prickly, spinulate) and spinatus (indicating a feature of the species related to the spine)] refers to the echinate dorsal endophallic spine of the aedeagus (Figs 124–126).

Published as part of Frisch, Johannes & Herman, Lee, 2025, Frischianus gen. nov., a new genus of the Scopaeina Mulsant & Rey, 1878 from the Oriental Region (Coleoptera: Staphylinidae: Paederinae: Lathrobiini), pp. 217-290 in Megataxa 17 (2) on page 253, DOI: 10.11646/megataxa.17.2.1, http://zenodo.org/record/18484125