Scopaeus tortuosiflagellatus 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 : 33-35

Scopaeus tortuosiflagellatus Frisch , spec. nov.

( Figs 8 , 33 , 68 –70 , 125 , 153, 154 )

Type specimens: Indonesia, Jawa Barat: Holotype ♂, Sukabumi, Cisalimas ( Cisalimas River ), (06°45’21’’S, 106°33’38’’E), 870 m, 19.9.2015, leg. Frisch ( MZB) . Paratypes (6 specimens): 1 ♀, same data as holotype ( MFNB) ; 1 ♂, Bogor, SW Pamijahan (06°42’41’’S, 106°41’03’’E), 990 m, 3.10.2015, leg. Frisch ( MZB) ; 1 ♂, 1 ♀, Sukabumi, NNW Cidahu: Javana Spa (06°44’43’’S, 106°42’51’’E), 1150 m, 30.9.2015, leg. Frisch ( MFNB, MZB) ; 2 ♀, Sukabumi: Cikaniki ( Cikaniki River ), (06°44’46’’S, 106°32’25’’E), 1020 m, 5.10.2015 ( MFNB, MZB) .

Description: Habitus and coloring as in Fig. 8 . Head subquadrate. Antennae with elongate penultimate segment. Mesotibia slender. Forebody surface with fine, setose punctation, shiny; abdomen matter than forebody. Pubescence of body surface short, decumbent, without conspicuous macrosetae. Body black-brown except for narrow, yellow-brown, posterior margin of elytra, light brown tip of abdomen, medium brown maxillary palpi with darker penultimate segment, and yellow-brown legs; antennae with scapus medium brown, from blackish pedicellus gradually lighter towards terminal segments. Total body length 2.4 – 2.9 mm; forebody length 1.5 – 1.6 mm.

Male: Abdominal sternite VII with unmodified posterior margin. Abdominal sternite VIII with bisinuate emargination with strongly convex median third in about posterior fifth of sternite length ( Fig. 125 ). Aedeagus ( Figs 33 , 68 – 70 ) about 1.1 mm long, with asymmetrical distal lobes; dextral apical lobe longer than acute sinistral apical lobe, enlarged apicad and with conspicuous, very slender, proximodorsad curved spine of ventral margin ( Figs 68, 69 : arrows I, II); dorsal lobe curved ventrad with short, acute end ( Fig. 68 ), in dorsal view evenly tapered towards acute apex ( Fig. 70 ); flagellum monstrous, strongly projecting ventrally, with strong, convex enlargement ( Figs 68, 69 : arrows III) at large, thick proximal winding, thinner and meandering towards end; lateral lobes small, narrow, projecting, each bearing apical group of long setae and proximal group of shorter setae ( Figs 68, 69 ); ventral lobe asymmetrical, divided in distodextral portion not much projecting ventrally and proximosinistral, transverse portion strongly triangularly projecting ventrally and laterally projecting from base of sinistral apical lobe ( Figs 33 , 68 – 70 ); transverse ridge of median foramen strongly, triangularly projecting ventrad ( Fig. 33 ).

Female: Chamber of sperm pump subrectangular, truncate towards process segment, with long, distad widened apophysis ( Fig. 154 ); bursal duct short, about twice as long as sperm pump, weakly sclerotized; bursa membranous ( Fig. 153 ).

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

Distribution: Scopaeus tortuosiflagellatus is distributed in Jawa Barat and was collected within and at the edge of the Mount Halimun – Salak National Park.

Etymology: The epithet tortuosiflagellatus [adjective, Latin, composed of the adjectives tortuosus (tortuous, winding) and flagellatus (indicating a characteristic/ feature of the flagellum)] refers to the huge, remarkably tortuous flagellum of the aedeagus of this new species ( Figs 33 , 68 – 70 ).

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 27–34. Aedeagus in lateral view of Scopaeus javanus, lectotype, Jawa Barat, N Bandung: Mt Tangkuban Perahu (27); S. batukaruensis, holotype, Bali, Tabanan: Bedugul (28); S. riedeli, holotype, Sumatra, South Lampung: Rajabasa Mts (29); S. jacobsoni, holotype, Sumatra: Padang (30); S. mixtus, holotype, Malaysia, Sabah: Sandakan (31); S. halimunsalakensis, holotype, Jawa Barat, Sukabumi:Sirnarasa (32); S. tortuosiflagellatus, holotype, Jawa Barat, Sukabumi:Cisalimas (33); S. posoanus, holotype, Sulawesi Tengah: Lake Poso (34).

Figures 68–73. Apex of aedeagus in lateral (68, 71), ventral (69, 72), dorsal view (70, 72) of Scopaeus tortuosiflagellatus, holotype, Jawa Barat, Sukabumi: Cisalimas (68–70); S. posoanus, holotype, Sulawesi Tengah: Lake Poso (71–73). Abbreviations: al – apical lobes, dl – dorsal lobe, f – flagellum, ll – lateral lobes, mf – median foramen, s – groups of setae, tr– transverse ridge, vl – ventral lobe, vld – dextral portion of ventral lobe, vls – sinistral portion of ventral lobe.Arrows: ventral spine of apical lobe (I, II), proximal enlargement of flagellum (III), ventral tooth of apical lobe (IV), tip of dorsal lobe (V, VI).

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 146–154. Sperm pump (146–154) and bursa (148, 149) of ♀ of Scopaeus javanus, Jawa Barat, Sukabumi: Kiara Dua (146); S. batukaruensis, paratype, Bali, Tabanan:Batukaru (147); S. jacobsoni, Jawa Barat, Sukabumi:Cidahu (148, with lateral gonocoxal plates IX; 150); S. mixtus, Malaysia, Sabah: Lokan (149, with lateral gonocoxal plates IX; 151); S. halimunsalakensis, paratype, Jawa Barat, Sukabumi: Sirnaresmi (152); S. tortuosiflagellatus, paratype, Jawa Barat, Sukabumi: Cisalimas (153, with bursal duct and bursa; 154). Long scale bar: 146, 147, 150–152, 154; short scale bar: 148, 149, 153.