Scopaeus diversilobatus Frisch 2022, spec. nov.
Creators: name: Frisch, Johannes
name: Narakusumo, Raden Pramesa
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Staphylinidae
Scopaeus
Scopaeus diversilobatus

description: Scopaeus diversilobatus Frisch, spec. nov.
(Figs 15, 39, 89–91, 133, 165, 166)
Type specimens: Holotype ♂, Indonesia, Jawa Barat, Sukabumi, N Djampang Kulon: Cikarang River (07°14’03’’S, 106°36’49’’E), 250 m, 25.9.2015, leg. Frisch (MZB). Paratypes (10 specimens): 3 ♂, 4 ♀, same data as holotype (MFNB, MZB). Indonesia, Bali: 1 ♂, Jembrana: Cekik, 20.6. 1994, 300 m, leg. Wunderle (PWCM). Malaysia, Sarawak: 1 ♂, Undong (San Uncap Undong?), 17.4.1981, leg. Rougemont (HECO); 1 ♂, Mt Mulu NP, near base camp, 50 – 10 m 5.8.1978, leg. Hammond & Marshall (NHML).
Description: Habitus and coloring as in Fig. 15. Head subquadrate. Penultimate antennal segment elongate. Mesotibia moderately thickened. Body surface with fine, dense, setose punctation, without microreticulation, shiny. Pubescence of body surface short, decumbent, without conspicuous macrosetae. Body dark brown except for slightly lighter pronotum, yellow-brown posterior fourth of elytra, medium brown abdomen with darkened disk of tergites and light brown tip, yellow brown maxillary palpi with darker penultimate segment, medium brown antennae with darker median segments, and yellow-brown legs. Total body length 3.6 – 3.9 mm; forebody length 2.1 – 2.3 mm.
Male: Abdominal sternite VII with unmodified posterior margin. Emargination in posterior fifth of abdominal sternite VIII strongly convex in median third (Fig. 133). Aedeagus (Figs 39, 89 – 91) about 1.0 mm long with distal lobes asymmetrical; dextral apical lobe strongly reduced, as long as dorsal lobe, in lateral view with undulate, convex apical and ventral margins (Fig. 39, 89), in ventral and dorsal view almost vestigial with truncate apex (Figs 90, 91); sinistral apical lobe well developed, testaceous, twice as long as dextral apical lobe, in lateral view triangular (Fig. 39, 89), in ventral and dorsal view convex laterally with somewhat retracted, acute apex (Figs 90, 91); flagellum curved ventrosinistrad with thin end projecting from apical lobes ventrally (Figs 39, 89); lateral lobes reduced, indicated by group of setae (Figs 89, 90); ventral lobe long, slender, adjacent to aedeagus (Figs 39, 89), in ventral view narrow and shifted sinistrad (Fig. 90); transverse ridge of median foramen not projecting ventrally (Fig. 89).
Female: Sperm pump with process segment and apophysis of chamber long, slender and curved at ends (Fig. 166); bursal duct about twice as long as sperm pump; bursa membranous (Fig. 165).
Phylogeny: Scopaeus diversilobatus is to be classified in the S. gracilis species group (Frisch et al. 2002: 39).
Distribution: Hitherto recorded from western Java, Bali and northern Borneo, Scopaeus diversilobatus is widespread in the Sunda Islands.
Etymology: The epithet diversilobatus [adjective, Latin, composed of the adjectives diversus (different) and lobatus (indicating a characteristic/feature of the lobe)] describes the different size and shape of the apical lobes of the aedeagus of this new species, one of which is strongly reduced unlike the other (Figs 87, 88).
description: Published as part of Frisch, Johannes & Narakusumo, Raden Pramesa, 2022, Revision of Scopaeus Erichson, 1839 (Coleoptera, Staphylinidae, Paederinae) of Indonesia, with description of 19 new species, pp. 23-73 in Soil Organisms 95 (1) on pages 42-48, DOI: 10.25674/so95iss1id311, http://zenodo.org/record/10724236