Orphnebius (Deroleptus) reticulipennis, Assing, 2017

Assing, Volker, 2017, On the Lomechusini fauna of the East Palaearctic and Oriental regions, with a focus on the genera Orphnebius and Amaurodera (Coleoptera: Staphylinidae: Aleocharinae), Beiträge Zur Entomologie = Contributions to Entomology 67 (1), pp. 63-106 : 86-87

Orphnebius (Deroleptus) reticulipennis spec. nov.

urn:lsid:zoobank.org:act:A4F9C29A-34F2-4B67-AD44-3CB3593B3D89

( Figs 5 , 34–36 ,90–94)

Type material: Holotype ♀: “ JAVA: W Java, Cibodas , 50 km E Bogor, 1400 m, 3.–6.XI.1989, Agosti, Löbl, Burckhard #2a / Holotypus ♀ Orphnebius reticulipennis sp. n., det. V. Assing 2016” ( MHNG).

Etymology: The specific epithet (Latin, adjective) alludes to the microreticulate elytra.

Description: Body length 4.2 mm; length of forebody 1.8 mm. Coloration ( Figs 5 , 34–35 ): head blackish; pronotum and elytra dark-brown; abdomen reddish-brown with segment VII slightly darker; legs yellowish-brown; antennae brown with antennomeres I–III reddishyellow; maxillary palpi dark-yellowish with the terminal palpomere yellowish.

Head ( Fig. 34 ) flattened, strongly transverse, approximately 1.4 times as broad as long, and with weakly marked posterior angles; posterior margin truncate, in the middle very weakly concave; dorsal surface with extremely fine and sparse punctation, median dorsal portion impunctate; interstices without microsculpture. Eyes extremely large and strongly bulging, occupying almost all of lateral margins of head nearly to posterior margin. Antenna ( Fig. 5 ) 1.6 mm long, not incrassate; antennomeres I–III elongate, IV weakly oblong, V approximately as long as broad, VI–X weakly transverse, X less than 1.5 times as broad as long, and XI approximately as long as the combined length of IX and X.

Pronotum ( Fig. 34 ) of trapezoid shape and strongly transverse, broadest at anterior angles, approximately 1.45 times as broad as long, and 0.9 times as broad as head, moderately convex in cross-section; lateral margins straight, distinctly converging posteriad in dorsal view; punctation extremely fine and moderately sparse; pubescence sub-erect, pale, short, and very fine, barely noticeable; anterior angles each with a moderately long, erect, dark seta.

Elytra ( Fig. 34 ) 1.25 times as long as pronotum; punctation moderately dense and moderately distinct, sparser posteriorly than anteriorly; interstices with distinct microreticulation; pubescence white, sub-erect, and moderately long, much more distinct than that of pronotum. Hind wings present. Legs moderately long and slender; metatibia approximately 1.0 mm long; metatarsomere I long, approximately as long as the combined length of the slender and long metatarsomeres II and III.

Abdomen ( Figs 35–36 ) slightly broader than elytra; sternites III and IV moderately produced postero-laterally, sternite IV more so than sternite III; sternite V weakly produced postero-laterally; paratergites IV antero-laterally with an acute process on either side; tergites III–VI with a lateral setiferous puncture on either side; tergite VII with dense non-setiferous punctation in posterior threefourths, posterior margin with palisade fringe; tergite VIII ( Figs 90–92 ) transverse, anteriorly with two clusters of gland openings, posteriorly with a median tubercle with two long setae, and postero-laterally with numerous long setae, posterior margin rather strongly concave and finely serrate (except in the middle).

♀: sternite VIII ( Fig. 93 ) transverse, middle of posterior margin truncate; spermatheca 0.29 mm long and shaped as in Fig. 94 .

Comparative notes: Orphnebius reticulipennis is distinguished from all its congeners from the Oriental region by the shape of the spermatheca and by the shape and chaetotaxy of tergite VIII. Among the species with similarly large eyes and a strongly transverse pronotum, it is additionally characterized by the morphology of the antennae, and by the modifications of the anterior segments of the abdomen. It differs from the six Orphnebius species previously recorded from Java by the coloration and the habitus alone.

Distribution and natural history: The type locality is situated in West Java, Indonesia, at an altitude of 1400 m.

Figures

Figs 1–30: Antenna (1–19), forebody (20, 23, 26), abdomen (21, 24, 27, 29), antero-lateral portion of abdomen in lateral-dorsal view (22, 25, 28), and abdominal segment VII (30) of Orphnebius triacuminatus (1, 20–22), O. gracilis (2, 23–25), O. protuberatus (3, 26–28), O. pertortus (4, 29–30), O. reticulipennis (5), Zyrastilbus almorensis (6), Pheidologitonetes bursata (7), Rabdotodrusilla vara (8), Amaurodera bicarinata (9), A. gilvicornis (10), A. latisulcata (11), A. brevipes (12), A. migritheca (13), A. longisetosa (14), A. calicitheca (15), Drusilla smetanai (16), D. nepalensis (17), D. lativentris (18), and Witteia tensa (19). Scale bars: 1–29: 1.0 mm; 30: 0.5 mm.

Figs 31–42:Orphnebius pertortus(31),O. migrus(32–33),O. reticulipennis(34–36),Zyrastilbusalmorensis(37–38),Pheidologitonetes bursata (39–40), and Rabdotodrusilla vara (41–42): forebody (31–32, 34, 37, 39, 41); elytra and abdomen (33); abdomen (35, 38, 40, 42); antero-lateral portion of abdomen in dorso-lateral view (36). Scale bars: 37–38: 1.0 mm; 31–36, 39–42: 0.5 mm.

Figs 82–100: Orphnebius migrus (82–89), O. reticulipennis (90–94), Tetrabothrus semiapterus (95–96), Zyrastilbus almorensis (97), and Pheidologitonetessetifer (98–100): maletergite VIII (82);male sternite VIII (83); medianlobeof aedeagus inlateral and inventral view (84–85, 95–96, 98–99); paramere (86); female tergite VIII (87, 90); female sternite VIII (88, 93); spermatheca (89, 94, 100); posterior portion of female tergite VIII (91); postero-lateral portion of female tergite VIII (92); median dorsal portion of head (97). Scale bars: 82–83, 87–88, 90, 93, 95–96, 98–99: 0.2 mm; 84–86, 89, 91–92, 94, 97, 100: 0.1 mm.