Scopaeus spiraliflagellatus 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 : 35-36

Scopaeus spiraliflagellatus Frisch , spec. nov.

( Figs 10 , 35 , 74 –76 , 128 , 157, 158 )

Type specimens: Indonesia: Holotype ♂, Sulawesi Tengah, Poso: Tentena – Peura ( Lake Poso ), (01°47’59’’S, 120°38’08’’E), 550 m, 9.5.2017, leg. Frisch ( MZB) . Paratypes (16 specimens): 1 ♀, same data as holotype ( MFNB) . Sulawesi Tengah: 1 ♀, Poso: S Peura ( Lake Poso ), (01°51’48’’S, 120°38’59’’E), 520 m, 9.5.2017, leg. Frisch ( MFNB) ; 1 ♀, Morowali: Betelene – Tinompo (02°06’06’’S, 121°08’26’’E), 430 m, 12.5.2017, leg. Frisch ( MFNB) ; 1 ♂, 5 ♀, Poso: Tentena – Taripa (01°48’40’’S, 120°46’30’’E), 880 m, 10.5.2017, leg. Frisch ( MFNB, MZB) ; 1 ♀, Poso: Tentena – Peura ( Lake Poso ), (01°47’59’’S, 120°38’08’’E), 550 m, 9.5.2017, leg. Frisch ( MFNB) ; 1 ♂, 3 ♀, Poso: Palolo – Sedoa: NW Sedoa (01°18’02’’S, 120°16’22’’E), 1250 m, 6.5.2017, leg. Frisch ( MFNB) . Sulawesi Selatan: 1 ♂, Makale , 17.07.1982, leg. Rougemont ( HECO) . 1 ♂, labeled ‘ Célebès, Kandari 7’ (handwritten; Kendari in Sulawesi Tenggara?), ‘ apicipennis Fvl’ (handwritten; in litteris name) ( ISNB) .

Description: Habitus and coloring as in Fig. 10 . Total body length 3.1 – 4.0 mm; forebody length 1.9 – 2.2 mm. Head subcircular. Antennae with penultimate segment elongate. Mesotibia strongly thickened. Forebody surface with extremely spacious, fine, shallow, setose punctation, strongly shiny; abdomen also very finely, but more densely punctate than forebody, thus somewhat matter; body surface without microreticulation. Forebody setation comparatively long and strongly raised, including numerous, long macrosetae. Body black-brown except for yellow-brown posterior fifth of elytra, tip of abdomen, and legs with dark brown basal half of profemora becoming evenly lighter towards yellow-brown distal half; maxillary palpi darkened; antennae with scapus medium brown, pedicellus slightly darkened, segment 3 darkest, then evenly lighter towards light yellow-brown terminal segments.

Male:Abdominal sternite VII with unmodified posterior margin. Abdominal sternite VIII widely emarginate in posterior fifth with median third of emargination almost semicircularly projecting posteriad ( Fig. 128 ); macrosetae of sternite VIII long, conspicuous. Aedeagus ( Figs 35 , 74 – 76 ) about 1.2 mm long with distal lobes strongly asymmetrical; apical lobes remarkably enlarged apically with short, right-angled dorsad curved apices; dextral apical lobe ventroproximad extended, ending in dorsad pointing hook ( Figs 35 , 74 ); ends of apical lobes, in ventral and dorsal view, curved towards each other, together forming triangular end ( Figs 75, 76 ); dorsal lobe subrectangular in lateral view ( Fig. 74 ), with transverse, slightly oblique, truncate end in dorsal view ( Fig. 76 ); flagellum extremely lengthened, whip-like, thin proximally, spiral with two windings at dextral side of aedeagus ( Figs 35 , 74 – 76 ); ventral lobe elongate, about four times as long as wide, pointing ventrodistad ( Figs 35 , 74 ); setose lateral lobes short, little projecting, strongly shifted distad to different extents ( Figs 35 , 74 – 76 ); median foramen large, asymmetrically extended distad with concave, distolateral enlargement at either side, without transverse ridge ( Figs 74, 75 ).

Female: Sperm pump with apophysis adjacent to bursal duct; bursal duct strongly sclerotized in distal half, proximal half membranous ( Figs 157, 158 ); bursa membranous.

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

Distribution: Scopaeus spiraliflagellatus , probably widespread in Sulawesi, is recorded in the surroundings of Lake Poso, Sulawesi Tengah, and in Kendari, Sulawesi Tenggara.

Etymology: The epithet spiraliflagellatus [adjective, Latin, composed of the noun spiralis (spiral) and the adjective flagellatus (indicating a characteristic/feature of the flagellum)] refers to the spiral flagellum of the aedeagus of this new species ( Figs 35 , 74 – 76 ).

Figures

Figures 8–10. Habitus of Scopaeus tortuosiflagellatus, paratype, Jawa Barat, Sukabumi: Cisalimas (8); S. posoanus, paratype, Sulawesi Tengah: Lake Poso (9); S. spiraliflagellatus, paratype, Sulawesi Tengah: Lake Poso (10).

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 74–79. Apex of aedeagus in lateral (74, 77), ventral (75, 78), dorsal view (76, 79) of Scopaeus spiraliflagellatus, holotype, Sulawesi Tengah: Lake Poso (74–76); S. anuliflagellatus, holotype, Jawa Barat, Sukabumi: Cidahu (77–79). Abbreviations: al – apical lobes, al(d) – dextral apical lobe, al(s) – sinistral apical lobe, dl – dorsal lobe, dl(d) – dextral end of dorsal lobe, dl(s) – sinistral end of dorsal lobe, f – flagellum, ll – lateral lobes, mf – median foramen, tr – transverse ridge of median foramen, vld – dextral portion of ventral lobe, vls – sinistral portion of ventral lobe.

Figures 119–133. Abdominal sternite VII (126) and abdominal sternite VIII (119–125, 127– 133) of ♂ of Scopaeus javanus, lectotype, Jawa Barat, N Bandung: Mt Tangkuban Perahu (119); S. batukaruensis, holotype, Bali, Tabanan: Bedugul (120); S. riedeli, holotype, Sumatra, South Lampung: Rajabasa Mts (121); S. jacobsoni, Jawa Barat: Mt Salak (122); S. mixtus, Malaysia, Sabah: Lokan (123); S. halimunsalakensis, holotype, Jawa Barat, Sukabumi: Sirnarasa (124); S. tortuosiflagellatus, holotype, Jawa Barat, Sukabumi: Cisalimas (125); S. posoanus, holotype, Sulawesi Tengah: Lake Poso (126, 127); S. spiraliflagellatus, holotype, Sulawesi Tengah: Lake Poso (128); S. anuliflagellatus, holotype, Jawa Barat, Sukabumi:Cidahu (129); S. pulcher, holotype, Jawa Barat, Sukabumi:Cikaniki (130); S. grandis, holotype, Jawa Barat, Sukabumi: Cidahu (131); S. heronifer, holotype, Banten, Lebak: Majasari (132); S. diversilobatus, holotype, Jawa Barat, Sukabumi: Djampang Kulon (133).

Figures 155–162. Sperm pump (155–162) and bursa (155, 159, 161) of ♀ of Scopaeus posoanus, paratype, Sulawesi Tengah: Lake Poso (155, with lateral gonocoxal plates IX; 156); S. spiraliflagellatus, paratype, Sulawesi Tengah: Lake Poso (157, with bursal duct; 158); S. anuliflagellatus, paratype, Jawa Barat, Sukabumi: Cikaniki (159, with lateral gonocoxal plates folded laterally; 160); S. pulcher, paratype, Jawa Barat, Sukabumi: Cikaniki (161, 162). Long scale bar: 156, 158, 160, 162; short scale bar: 155, 157, 159, 161. Abbreviations: ap – apophysis of chamber segment, b – (sclerotized end of) bursa, bd – bursal duct, cs – chamber segment, dp – distal process of chamber segment, lt – lateral gonocoxal plate IX, sd – spermathecal duct.