Scopaeus cuspilobatus Frisch, 2022

Frisch, Johannes & Narakusumo, Raden Pramesa, 2022, Revision of Scopaeus Erichson, 1839 (Coleoptera, Staphylinidae, Paederinae) of Indonesia, with description of 19 new species, Soil Organisms 95 (1), pp. 23-73 : 48

Scopaeus cuspilobatus Frisch , spec. nov.

( Figs 16 , 38 , 92 – 94 , 134, 167, 168)

Type specimens: Indonesia: Holotype ♂, Jawa Barat, Sukabumi: Sirnarasa ( Cimaja River ), (06°51’32’’S, 106°31’06’’E), 670 m, 21.9.2015, leg. Frisch ( MZB) . Paratype: 1 ♀, same data as holotype ( MFNB) .

Description: Habitus and coloring as in Fig. 16 . Head subquadrate. Penultimate antennal segment quadrate. Mesotibia moderately thickened. Setose punctation of body surface fine, dense on subnitid head, rugulose on matt elytra, more spacious on shiny pronotum; microreticulation absent. Pubescence of body surface short, decumbent, without conspicuous macrosetae. Body dark brown except for narrow, light brown posterior margin of elytra and tip of abdomen; antennae medium brown with darker segments 2 – 6; maxillary palpi light brown with darker penultimate segment; legs light brown with medium brown femora. Total body length 3.6 mm; forebody length 2.0 – 2.1 mm.

Male: Abdominal sternite VII with unmodified posterior margin. Abdominal sternite VIII with posterior margin with two very short, lateral emarginations and barely recognizably concave middle (Fig. 134). Aedeagus ( Figs 38 , 92 – 94 ) about 0.8 mm long with asymmetrical distal lobes; apical lobes curved ventrad with round ends ( Figs 38 , 92 ), in ventral and dorsal view stout with broad, subtruncate apices ( Figs 93, 94 ); dextral apical lobe with little, ventroproximal tooth ( Fig. 92 : arrow I), convexly widened dextrad distally ( Figs 93, 94 ); sinistral apical lobe evenly convex distolaterally, somewhat overlapping dextral apical lobe ventrally ( Fig. 93 ); dorsal lobe broad with convex apex ( Fig. 94 ); flagellum winding dextrad ( Fig. 93 ), strongly projecting from apical lobes ventrally ( Figs 38 , 92 ); lateral lobes reduced, marked by unequal groups of setae ( Figs 93, 94 ); ventral lobe broad, subquadrate, with truncate apex ( Figs 38 , 92 ), in ventral view narrow, strongly shifted sinistrad ( Fig. 93 ); transverse ridge of median foramen concave ( Fig. 93 ), strongly projecting ventrally ( Figs 38 , 92 ).

Female: Sperm pump with chamber abruptly narrowed at transition point towards bursal duct ( Fig. 168 ); bursal duct about three times as long as sperm pump; bursa membranous ( Fig. 167 ).

Phylogeny: Scopaeus cuspilobatus is a member of the S. gracilis species group ( Frisch et al. 2002: 39).

Distribution: Scopaeus cuspilobatus is hitherto known only from the type locality in Jawa Barat.

Etymology: The epithet cuspilobatus [adjective, Latin, composed of the noun cuspis (sting, thorn, spine) and lobatus (indicating a characteristic/feature of the lobe)] refers to the distinct, ventral spine of the dextral apical lobe of the aedeagus of this new species ( Figs 38 , 83 ).

Figures

Figures 14–16. Habitus of Scopaeus heronifer, paratype, Jawa Barat: Mt Salak (14); S. diversilobatus, paratype, Jawa Barat, Sukabumi: Djampang Kulon (15); S. cuspilobatus, paratype, Jawa Barat, Sukabumi: Sirnarasa (16).

Figures 35–41. Aedeagus in lateral view of Scopaeus spiraliflagellatus, holotype, Sulawesi Tengah: Lake Poso (35); S. anuliflagellatus, holotype, Jawa Barat, Sukabumi: Cidahu (36); S. grandis, holotype, Jawa Barat, Sukabumi: Cidahu (37); S. cuspilobatus, holotype, Jawa Barat, Sukabumi: Sirnarasa (38); S. diversilobatus, holotype, Jawa Barat, Sukabumi: Djampang Kulon (39); S. pulcher, holotype, Jawa Barat, Sukabumi: Cikaniki (40); S. heronifer, holotype, Banten, Lebak: Majasari (41).

Figures 92–97. Apex of aedeagus in lateral (92, 95), ventral (93, 96), dorsal view (94, 97) of Scopaeus cuspilobatus, holotype, Jawa Barat, Sukabumi: Sirnarasa (92–94); S. elegantulus, Jawa Barat, Sukabumi, Sirnarasa: Cisarua (95– 97). Abbreviations: al(d) – dextral apical lobe, al(s) – sinistral apical lobe, dl – dorsal lobe, f – flagellum, mf – median foramen, tr – transverse ridge of median foramen, vl – ventral lobe. Arrows: ventral tooth of dextral apical lobe (I), lateral ridges of median foramen (II, III).

Figures 163–172. Sperm pump (163–172) and bursa (165, 167, 170, 172) of ♀ of Scopaeus grandis, paratype, Jawa Barat, Sukabumi: Cidahu (163); S.heronifer, paratype, Jawa Barat, Sukabumi:Sirnarasa (164); S. diversilobatus, paratype, Jawa Barat, Sukabumi, Djampang Kulon (165, with lateral gonocoxal plates IX folded laterally; 166); S. cuspilobatus, paratype, Jawa Barat, Sukabumi: Sirnarasa (167, with lateral gonocoxal plates IX, 168); S. velifer, paratype, Banten, Lebak: Citorek Kidul (169); S. elegantulus, Jawa Barat, Sukabumi: Djampang Kulon (170, with lateral gonocoxal plates IX, 171), S. uncinatus, paratype, Banten, Lebak: Citorek Kidul (172). Long scale bar: 163, 164, 166, 168, 169, 171, 172; short scale bar: 165, 167, 170.

Figures 80–85. Apex of aedeagus in lateral (80, 83), ventral (81, 84), dorsal view (82, 85) of Scopaeus grandis, holotype, Java Barat, Sukabumi: Cidahu (80–82); S. pulcher, holotype, Jawa Barat, Sukabumi: Cikaniki (83–85). Abbreviations: al(d) – dextral apical lobe, al(s) – sinistral apical lobe, dl – dorsal lobe, f – flagellum, ll – lateral lobes, mf – median foramen, tr – transverse ridge of median lobe, vl – ventral lobe.