Pseudovelia hypodonta ( LUNDBLAD , 1933)

Hecher, Ch. & Zettel, H., 2006, Review of the genus Pseudovelia HOBERLANDT 1950 (Heteroptera: Veliidae) on the Malay Peninsula, Linzer biologische Beiträge 38 (1), pp. 701-710 : 703-705

Pseudovelia hypodonta ( LUNDBLAD, 1933) ( Figs. 1-4 )

Microvelia hypodonta LUNDBLAD 1933: 329-331 .

Pseudovelia (s.str.) hypodonta: ANDERSEN 1983: 264-265 .

M a t e r i a l e x a m i n e d: Indonesia: Holotype (apt.), Sumatra, Wai Negri, Ranau, 22 Jan. 1929 ( NRMS); 1 (apt.), Kundur Islands , Riau Island, Parit Gantung Sei Ungar, 13 Oct. 1998, leg. H.K. Lua & D. Wowor, # LHK 399 ( ZRCS); 3 (apt.), 3 (apt.), Bintan Island , 47 km to Tanjong Pinang, 28 June 1995, leg. H.K. Lua & C.Y. Tuang, # LHK 268 ( ZRCS, 1, 1 NHMW). Singapore: 1 (apt.), 2 (apt.), stream off Selatar Reservoir, 20 Feb. 1992, leg. C.M. Yang & K.L. Yeo, # YKL 779 ( ZRCS); 3 (apt.), 9 (apt.), 1 (macr.), Lorong Banir, 16 June 1994, leg. K. Lim & al., # NS 160B ( ZRCS, 1, 2 NHMW); 2 (macr.), Lorong Banir, 10 June 1994, leg. K. Lim & al., # NS 157B ( ZRCS); 3 (apt.), 5 (apt.), Lorong Banir, 15 June 1995, leg. H.K. Lua & al., # NS 189A + 189B ( ZRCS); 1 (macr.) Lorong Banir, 3 June 1994, leg. K. Lim & al., # NS 149A ( ZRCS); 3 (apt.), 2 (apt.), Lorong Banir, 23 June 1994, leg. K.L. Yeo & al., # NS 167 ( ZRCS, 1, 1 NHMW); 1 (apt.), Nee Soon swamp, permanent forest stream, 18 May 1993, leg. C.M. Yang & al., # NS 86 ( ZRCS); 1 (apt.), Nee Soon swamp forest, 30 April 1992, leg. K.L. Yeo & B.K. Kung, # NS 001F ( ZRCS).

R e d e s c r i p t i o n o f t h e a p t e r o u s m o r p h a n d d e s c r i p - t i o n o f t h e m a c r o p t e r o u s m o r p h: S i z e: Length 2.10-2.27 mm (apt.), 2.33-2.35 mm (macr.), 2.25-2.50 mm (apt.), 2.46-2.50 mm (macr.

), length of tergites 1-7(8) to width of tergite 4 as 0.26-0.30: 1 (apt.), 0.22-0.25: 1 (apt.), width across suture between metanotum and laterotergite 1: 0.72-0.80 mm (apt.), 0.78-0.87 mm (apt.), width of pronotum 0.67-0.77 mm (apt.,), 0.97 mm (macr.), 0.97-1.00 mm (macr.), width of head 0.50-0.63 mm (), 0.52-0.60 ().

A p t e r o u s m a l e: Colour. Head light brown and dark brown or black; antenna brown. Pronotum light brown, with transverse stripe near anterior margin medially yellow and laterally light brown, median line of pronotum yellow; black, irregularly distributed pores or punctures on pronotum except on transverse stripe, and on tergite 1. Metanotum light brown. Legs light brown, with basal part of femora whitish and basal part of metatibia darker brown. Tergites and laterotergites light brown or dark reddishbrown, in some dark specimens lateral parts of laterotergites 2-7 slightly lighter; sutures between tergites and laterotergites broadly dark brown to black. Ventral surface of thorax and abdomen light brown to reddish-brown, sutures between sternites black.

Pilosity. Entire body surface covered with short, decumbent to suberect, silvery hairs. Erect hairs on head, antenna, and legs short, on anterior and lateral portions of pronotum, on metanotum, tergites, and laterotergites long and scattered, only on caudal margin of tergite 7 and of sternite 7 more dense; sternites 1-6 without erect hairs. Stout, silvery hairs forming stripes on vertex along margin of eyes, one small patch on base of vertex (in some specimens very indistinct), patches on lateral part of tergite 1, medio-caudal part of tergites 2, 3, 6, and 7, and covering caudal margin of laterotergite 1 and mediocaudal parts of laterotergites 3-5, some silvery hairs also on transverse stripe of pronotum. Metatarsal segment 1 with row of bristle-like hairs over entire length. Eyes naked except for two ocular setae.

Structural characters. Ventral lobe of head not produced caudad. Antenna 0.64-0.68 times as long as body, relative lengths of segments 1-4 as 1.4-1.6: 1: 1.1-1.2: 1.3-1.5, segment 1> segment 4. Pronotum 0.55-0.64 times as long as wide. Grasping comb on protibia 0.45-0.54 times as long as tibia; metatarsus ( Fig. 3 ) 0.54-0.61 times as long as metatibia, first segment 1.00-1.16 times as long as segment 2 (except two males from Bintan Island: 0.89: 1). Second tergite 0.87-0.96 times as wide as head. Laterotergites differently raised, causing variation of maximum width of body: across suture between metanotum and laterotergite 1 if strongly raised or across tergite 4 if laterotergites slightly raised.

Genital segments. Ventral depression of segment 8 with triangular table-like elevation on medial part, caudo-laterally with two tufts of bristles; caudal margin of depression with three tubercles: one laterally flattened and with comb of short bristles, two with tuft of longer bristles ( Figs. 1, 2 ). Proctiger and pygophore covered with dense, short, erect hairs.

M a c r o p t e r o u s m a l e: Colour as in apterous male; head in some specimens darker brown with only basal part of vertex light brown. Wings brown, with two elongate white stripes at base.

Pilosity as in apterous male except for body parts covered by wings; long, erect hairs on media + cubitus and on first anal vein; additionally long, decumbent to suberect, silvery hairs on caudal part of pronotum and on sternites.

Structural characters and genital segments as in apterous male, but antenna 0.60-0.63 times as long as body; pronotum 0.97 times as long as wide; laterotergites strongly raised; wings slightly surpassing genital segments.

A p t e r o u s f e m a l e: Colour and pilosity as in apterous male; long, erect hairs obviously dense on laterotergites 6 and 7.

Structural characters as in apterous male; antenna 0.56-0.63 times as long as body; protibia without grasping comb; metatarsus 0.48-0.56 times as long as metatibia, first segment 0.65-0.78 times as long as segment 2; second tergite 0.81-0.94 times as wide as head; laterotergites very strongly raised.

Genital segments. Proctiger covered with dense, short, erect hairs; gonocoxa 1 with scattered, suberect, short hairs. Structure of genital segments as shown in Figure 4.

M a c r o p t e r o u s f e m a l e: Colour and pilosity as in macropterous male; additionally whitish patches on posterior part of cell beween media + cubitus and first anal vein, and on discal cell.

Structural characters and genital segments as in apterous female; antenna 0.56-0.57 times as long as body; pronotum 0.87-0.91 times as long as wide.

D i a g n o s i s: Bodylength 2.1-2.3mm (apt.), 2.3-2.4 mm (macr.), 2.2-2.5 mm (apt.), 2.5 mm (macr.); length of tergites 1-7(8) to width of tergite 4 as 1: 0.2-0.3 (apt.,); pronotum length to pronotum width as 0.5-0.6: 1 (apt.,), 1.0: 1 (macr.

), 0.9: 1 (macr.); length of antenna to body length as 0.6-0.7: 1, relation of antennal segments 1-4 as 1.4-1.6: 1: 1.1-1.2: 1.3-1.5, segment 1> segment 4; width of second tergite to width of head as 0.9-1.0: 1 (apt.), 0.8-0.9: 1 (apt.); length of metatarsus to metatibia as 0.5-0.6: 1 (,), length of first metatarsal segment to second as 1.0-1.2: 1 (except 2 males from Riau with 0.9: 1), 0.6-0.8: 1 () ; length of grasping comb on male protibia to length of protibia as 0.5: 1; vertex with patch of silvery hairs; eye not pilose; ventral lobe of head not produced caudad; first metatarsal segment of male ( Fig. 3 ) with row of bristle-like hairs over entire length; structure of male and female genital segments as shown in Figs. 1-2 and 4 , respectively.

G e n e r a l d i s t r i b u t i o n: Singapore, Riau Isl., Bintan Isl., Sumatra, Java (?).

Figures

Figs 1-14: (1-4) Pseudovelia hypodonta. (5-8) Pseudovelia lundbladi. (9-14) Pseudovelia yangae sp.n. (1, 5, 9) segment 8 of male, ventral. (2, 6, 10) segment 8 of male, lateral. (3, 7, 11) metatarsus of male. (4, 8, 12) end of abdomen of female, lateral. (13) forewing. (14) antenna of male. Fine, not diagnostic pilosity partly omitted. Homologous structures with identical scale as given for P. hypodonta.