Scaphobaeocera jirkai, Löbl, 2018

Löbl, Ivan, 2018, A review of Scaphisomatini from Sulawesi, with descriptions of ten new species (Coleoptera: Staphylinidae: Scaphidiinae), Acta Entomologica Musei Nationalis Pragae 58 (1), pp. 151-165 : 164

Scaphobaeocera jirkai sp. nov.

( Figs 47–49 )

Type locality. Indonesia, South Sulawesi, Gowa District, 6 km E of Malino, Gunung Bawakaraeng [Mt.] Area, near Lembanna Base camp, ca. 05°15.4 ′ S, 119°54.5 ′ E.

Type material. HOLOTYPE: ( NMPC), INDONESIA, S SULAWESI: Gowa Distr. / 6 km E of Malino, Gn. Bawakaraeng Area / border of gardens and mixed forest / (dominant Pinus) nr Lembanna Base camp / 05°15.4 ′ S, 119°54.5 ′ E, 1520 m / J.Hájek & J.Šumpich leg., 11-13.ii.2015. PARATYPES: 2 ♀♀ ( NMPC, MHNG), with the same data as the holotype.

Description. Length 1.34–1.42 mm, width 0.71–0.77 mm, dorsoventral diameter 0.76–0.78 mm. Head and most of body black; mouth-parts, antennomeres I to V or to VI, legs and abdominal ventrites III to VI reddish-brown; antennomeres VI or VII to XI brown, darker than preceding antennomeres; pronotum becoming somewhat lighter toward anterior margin; elytra with light reddish-brown to yellowish apical margins; hypomera dark, blackish-brown; basomedian parts of metaventrite and abdominal ventrite I reddish-brown. Length/width ratios of antennomeres as: III 18/5: IV 24/5: V 30/5: VI 24/5: VII 32/10: VIII 20/8: IX 33/12: X 32/16: XI 47/17. Pronotal and elytral punctation similar, very fine and sparse, distinct at 50× magnification. Pronotum not iridescent. Tip of scutellum exposed. Elytra strongly iridescent, with sutural striae starting at basal margin, laterally pronotal lobe, parasutural striae present, shallow. Hypomera smooth, lacking striae. Mesanepisterna, mesepimera and lateral parts of metaventrite with strigulate microsculpture, appearing impunctate. Middle of metaventrite flattened, without mesal stria, not impressed. Submesocoxal lines parallel, with sparse, coarse, not elongate punctures, submesocoxal areas about 0.02 mm, as long as fifth of shortest intervals between them and metacoxae. Metanepisterna flat, parallel-sided, 0.04 mm wide, with straight, deep suture. Tibiae straight. Abdomen with strigulate microsculpture, appearing impunctate (100× magnification), coarse basal punctures of ventrite I excepted.

Male characters. Protarsomeres I to III strongly enlarged; I about as wide as apices of tibiae, II and III narrower. Mesal part of metaventrite very densely punctate and bearing short pubescence. Aedeagus ( Figs 47, 48 ) 0.44 mm long, with apical process asymmetrically bent, oblique and tapering. Apical side of basal bulb strongly sclerotized and prominent. Parameres wide, enlarged apically in lateral view, overlapping and straight in dorsal view. Internal sac complex, with proximal hook and short flagellum.

Female characters. Protarsomeres not enlarged. Metaventrite densely punctate and pubescent on small apicomedian surface. Gonocoxite slightly bent, gradually narrowed, asetose ( Fig. 49 ).

Differential diagnosis. This new species shares with S. spinigera Löbl, 1979 , S. uncata Löbl, 1990, S. orousseti Löbl, 2011 and S. pubiventris Löbl, 2011 the strongly sclerotized and prominent apical side of the basal bulb, the widened parameres and the internal sac with a short, not spiral, flagellum bearing a proximal hook, in combination. However, none of them has the parameres as large and overlapping, and with the proximal hook of the internal sac as conspicuous, as in S. jirkai sp. nov. In addition, S. spinigera and S. orousseti may be easily distinguished by the microsculptured hypomera and significantly shorter antennomere XI, while S. pubiventris and S. uncata differ notably by the presence of hypomeral striae and antennomeres VI and VIII being similar in length. Scaphobaeocera uncata may be readily distinguished by its small-sized, only 1.1 mm long body.

Etymology. The species is dedicated to one of its collectors, Jiří Hájek (Praha); the species epithet is a Czech diminutive of his first name. The name is a noun in the genitive case.

Distribution. Indonesia, South Sulawesi.

Figures

Figs 35–49. 35–39 – Scaphisoma versicoloreum sp. nov.: 35, 36 – aedeagus in dorsal and lateral views; 37 – internal sac of aedeagus; 38 – male tergite 9; 39 – gonocoxite.40–46 – S. carinatum sp. nov.: 40 – male tergite 9; 41 – apical process of aedeagal median lobe in lateral view; 42 – tip of apical process in ventral view; 43, 44 – aedeagus in dorsal and lateral views; 45 – parameres in ventral view; 46 –internal sac of aedeagus. 47–49 – Scaphobaeocera jirkai sp. nov.: 47, 48 – aedeagus in dorsal and lateral views; 49 – gonocoxite. Scale bars: 0.1 mm (Figs 37, 39, 41–42, 46–49); 0.2 mm (Figs 35–36, 43–45); 0.3 mm (Figs 38, 40).