Scopaeus elegantulus Cameron, 1930

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 : 48-51

Scopaeus elegantulus Cameron, 1930

( Figs 18 , 43 , 95 – 97 , 136, 170, 171)

Scopaeus elegantulu s Cameron, 1930: 346, 347.

Type specimens examined: Holotype ♂, Malaysia, Pahang: Raub; labeled ‘Type’ (red edged, round, printed label), ‘Raub / Pahang F.M.S. / Dr. Cameron’ (printed), ‘S. / elegantulus Cam. / TYPE’ (handwritten), ‘M. Cameron / Bequest / B.M.1955-147.’ (printed), ‘NHMUK014663052’ (printed with QR-code), ‘ Holotype / Scopaeus elegantulus / Cameron 1930 / label by J. Frisch, 2022 ’ (red, printed) ( NHML). Paratypes: 4 ♂, labeled ‘Raub / Pahang F.M.S. / Dr. Cameron’ (printed), ‘M. Cameron / Bequest / B.M.1955-147.’ (printed), ‘ Paratype / Scopaeus elegantulus / Cameron 1930 / label by J. Frisch, 2022 ’ (subsequent paratype label, red, printed) ( NHML).

Comment: In the original description of Scopaeus elegantulus , the number of underlying specimens is missing, but Cameron (1930: 347) wrote the type was from Raub and labeled it as the ‘type’. Thus, the specimen is a holotype by original designation ( ICZN 1999: Article 73.1.1.). In the same paper, Cameron (1930) several times termed holotypes by monotypy ( ICZN 1999: Article 73.1.2.) as ‘unique’, but not for S. elegantulus , which is why I conclude that the species was described after more than one specimen. Thus, I consider the four remaining specimens as paratypes, because they originate from the type locality and the Cameron collection at NHML.

New Indonesian records: Bali: Jembrana: env. Cekik , 20.6. 1994, 300 m, leg. Wunderle ( PWCM) . Jawa Barat: Sukabumi, Sirnarasa, Cisarua : Ciawitali River (06°51’39’’S, 106°30’48’’E), 680 m, 20.9.2015, leg. Frisch ( MFNB, MZB) ; Sukabumi, Cikaniki: Cikaniki River ( Mt Halimun , Halimun-Salak NP), 950 m, 26.4.1999, leg. MZB ( MZB) ; Sukabumi, Cikaniki: Cikaniki River ( Mt Halimun , Halimun-Salak NP), (06°44’46’’S, 106°32’25’’E), 1020 m, 17.9.2015, leg. Frisch ( MZB) ; Sukabumi, Sirnarasa: Cimaja River (S-slope Mt Halimun ), (06°51’32’’S, 106°31’06’’E), 670 m, 21.9.2015, leg. Frisch ( MFNB, MZB) ; Sukabumi: Simaresmi ( Halimun-Salak NP), (06°49’44’’S, 106°30’02’’E), 1190 m, 22.9.2015, leg. Frisch ( MFNB, MZB) ; Sukabumi, Kiara Dua: Ciletuh River (07°08’27’’S, 106°37’46’’E), 710 m, 24.9.2015, leg. Frisch ( MFNB) ; Sukabumi , N Djampang Kulon: Cikarang River (07°14’03’’S, 106°36’49’’E), 250 m, 25.9.2015, leg. Frisch ( MFNB, MZB) ; Bogor [Buitenzorg], leg. Lea & wife ( SAMA) . Jawa Timur: Situbondo : 15 km N Wonorejo (Baluran NP), 50 m, 24. – 28.6.2001, leg. Bolm ( SMNS) ; Tulungagung [Toeloengagoeng], 84 m, leg. Louwerens ( NHML) . Riau: Bukit Tigapuluh NP (0°50’S, 102°26’E), 18. – 25.1.2000, leg. Bezdĕk ( PKCC) . Sumatera Barat : Bukittingii: Fort de Kock , 920 m, 1926, leg. Jacobson ( NHML) .

Redescription: Habitus and coloring as in Fig. 18 . Head subcircular. Penultimate antennal segment quadrate or slightly elongate. Mesotibia strongly thickened. Body surface shiny with fine, spacious, setose punctation; microreticulation absent. Pubescence of body surface short, erect. Body orange-brown to black-brown with reddish tinge, usually reddish dark brown with pronotum and abdomen somewhat lighter than head and elytra; tip of abdomen and posterior sixth of elytra yellow-brown; maxillary palpi light medium brown; antennae with scapus medium brown and pedicellus and subsequent segments more or less blackened, gradually lighter towards light brown terminal segments. Total body length 3.1 – 3.7 mm; forebody length 1.9 – 2.1 mm.

Male: Abdominal sternite VII with unmodified posterior margin. Abdominal sternite VIII in about posterior fifth with wide, triangular emargination straight in median fourth (Fig. 136). Aedeagus ( Figs 43 , 95 – 97 ) about 0.7 mm long, with short, asymmetrical distal lobes; apical lobes rectangular with wide, truncate apex and small, acute, apicoventral tooth ( Figs 43 , 95 ), in ventral strongly curved distomediad and slightly overlapping distomedially ( Figs 96 ); dorsal lobe stout, transverse, with apex emarginate ( Figs 96, 97 ); flagellum short, thin, projecting from apical lobes ventrally as well as small, proximad curved tooth proximal of flagellum ( Figs 43 , 95 ); setose lateral lobes absent ( Figs 96, 97 ); ventral lobe about twice as long as wide with apex acute in lateral view ( Figs 43 , 95 ), but deeply emarginate in ventral view ( Fig. 96 ); median foramen oblong with acute proximal end, occupying more than half of phallobase length ( Fig. 96 ), with transverse ridge weakly sclerotized and lateral ridges of median foramen bent up ventrad ( Figs 95, 96 : arrows II, III).

Female: Chamber of sperm pump elongate, with apophysis adjacent to bursal duct ( Fig. 171 ); bursal duct about twice as long as sperm pump; bursa membranous ( Figs 170 ).

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

Distribution: Described from Pahang in the Malay Peninsula, Scopaeus elegantulus is widely distributed across Indonesia and recorded for Java, Sumatra and Bali.

Figures

Figures 17–22. Habitus of Scopaeusvelifer, paratype,Banten, Lebak:Citorek Kidul (17); S. elegantulus, Jawa Barat, Sukabumi:Djampang Kulon (18); S. uncinatus, paratype, Jawa Barat, Sukabumi: Cidahu (19); S. bipenicillatus, paratype, Sulawesi Tengah, Sigi: Pagana (20); S. bipectenatus, paratype, Sulawesi Tengah: Lake Poso (21); S. crassipunctatus, paratype, Jawa Barat, Sukabumi: Sirnarasa (22).

Figures 42–49. Aedeagus in lateral view of Scopaeus velifer, holotype, Banten, Lebak: Citorek Kidul (42); S. elegantulus, Jawa Barat, Sukabumi, Sirnarasa:Cisarua (43); S. uncinatus, holotype,Banten, Lebak:Citorek Kidul (44); S. bipenicillatus, holotype,Sulawesi Tengah, Sigi: Pagana (45); S. bipectenatus, holotype, Sulawesi Tengah, Poso: Lake Poso (46); S. cuspidatus, holotype, Bali, Jembrana: Cekik (47); S. crassipunctatus, holotype, Jawa Barat, Sukabumi, Sirnarasa:Cisarua (48); S. sulawesianus, holotype, Sulawesi Selatan: Engrekang (49).

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.