Microeubria sp.

Lee, Chi-Feng & Yang, Ping-Shih, 2002, Notes On The Larva Of The Genus Microeubria Lee And Yang, With Description Of A New Species From Borneo (Coleoptera: Psephenidae: Eubriinae), The Coleopterists Bulletin 56 (2), pp. 246-252 : 247

Microeubria sp.

Material Examined. 1 female ( NTUC): ‘‘ LAOS: Phongsali 14–16.V.1996, leg. C.­F. Lee / reared from larva’ ’; 20 larvae ( NTUC, NHMW), same data as preceding .

Adult Diagnosis. Elytron with 5 visible striae ( Fig. 11 ): striae 1–4 arising from near base, stria 2 apically conjoined with stria 3, and then apically conjoined with stria 1, striae 1 and 4 apically abbreviated near apex; stria 5 arising from basal 1/4, divided into two striae at middle, and apically abbreviated at apical 4/9; granules irregularly distributed along apex. Last­instar Larval Diagnosis. Body form elongately oblong ( Fig. 1); widest at first abdominal segment, apically tapering. Thoracic terga densely and finely pubescent ( Fig. 4 ). Disposable cuticular tissue filling crevices between thoracic and abdominal pleurites, and forming two paired longitudinal ridges on dorsal surface of abdominal segments ( Figs. 2, 3, 5 ). Lateral margins of meso­ and metathoracic segments with recurved, hook­like pleurites; lateral margins of abdominal segments 1–7 with slender, parallel­sided pleurites ( Fig. 1). Outward margins of prothorax with dense marginal hair­like setae, only one pair on apical margins of pleurites of meso­ and metathoracies and abdominal segments 1–7 ( Figs. 6–8 ). Lanceolate basal setae also present on outward margin of prothorax, apical margins of pleurites of pro­, meso­ and metathoracies, and abdominal segments 1–7; setae on prothorax much smaller than others. Number of setae reduced to 3 on abdominal segment 1 ( Fig. 6 ); 2 on other segments ( Fig. 8 ). Anterior and posterior margins of meso­ and metathoracies, abdominal segments 1–8 without setae. Pleurites of abdominal segment 8 with a pair of lanceolate setae near apices ( Fig. 10 ); each process directed outward, not close to abdominal segment 9. Abdominal segment 9 shorter than its pleurites, margined with setae and long hair­like setae ( Fig. 9 ). Apical spiracles on abdominal segment 8 and spiracular brushes on segment 9 reduced ( Fig. 10 ).

Biology. All larvae were collected from a water fall, where water current was very slow. In addition to larvae of Microeubria , larvae and adults of Schinostethus (Sundodrupeus) albosulcus Lee et al. (1998) were also collected from the same habitat.

Figures

Fig. 11. Microeubria sp. (from Laos). Figs. 12, 13. Microeubria acuta sp. n. 11, 12) right elytron; 13) aedeagus. Scale bars = 0.25 mm for Figures 11 and 12; 0.1 mm for Figure 13.

Figs. 2–5. Microeubria sp., larva. 2) Thorax and abdominal segments 1–7; 3) metathorax and abdominal segments 1–9; 4) pronotum; 5) abdominal pleurites 1–3.

Figs. 6–10. Microeubria sp., larva. 6) Abdominal pleurite 1; 7) mesonotal pleurite; 8) abdominal pleurite 3; 9) abdominal pleurite 9; 10) abdominal pleurite 8. Scale bar = 0.1 mm.