Paramarginatus sarawakensis Dubey

Dubey, Anil Kumar & Brown, Paul A., 2022, Six new species of Aleuromarginatus Corbett, 1935 and Paramarginatus sarawakensis Dubey gen. and sp. nov. (Hemiptera: Aleyrodidae) from Southeast Asia, Journal of Natural History 55 (41 - 42), pp. 2605-2649 : 2643-2644

Paramarginatus sarawakensis Dubey sp. nov.

( Figure 19 )– Figure 20 (g))

Puparium (n = 3, 2 female, 1 male)

Elliptical ( Figure 19 )); sexually dimorphic, female 1310–1320 µm long, 950–960 µm wide, male 940 µm long, 680 µm wide, female puparia larger than the male puparia.

Margin

Marginal teeth triangular, sharply pointed ( Figure 19 ), Figure 20 (a,c)), 4 crenulations in 0.1 mm. Caudal and thoracic tracheal combs not indicated in the margin, but caudal tracheal pore area slightly indented.

Dorsum

Dorsal surface smooth, without tubercles. Submargin not differentiated from the dorsal disc and submedian longitudinal row of tubercles absent. Submarginal setae minute, barely discernable, about 10 pairs, 7 µm long. Longitudinal moulting suture reaching margin and transverse moulting suture reaching submedian area ( Figure 20 )). Meso-metathoracic suture reaching submedian area. A pair of cuticular folds present on submedian area of metathorax in a single puparium. Abdominal segment sutures prominent, reaching subdorsal area. Abdominal segments I–VII with wax glands made up of hexagonal cells ( Figure 19 ), Figure 20 (d,e)). Distance from posterior margin of vasiform orifice to caudal tracheal comb opening area 102 µm in females and 85 µm in males. Median length of cephalothorax (450 µm in female puparia, 375 µm in male) smaller than that of abdomen (860–870 µm in females, 565 µm in male). Median length of mesothorax (102–122 µm in females, 112 µm in males) longer (22–67 µm) than that of metathorax (22–35 µm in females, 37 µm in males)( Figure 20 )). Abdominal segment VII not reduced in middle length, half the length of segment VII, but segment VIII nearly half the length of segment VII. The median length of abdominal segment IV is the highest and that of segment VIII is the smallest. Median lengths of abdominal segments I–VIII: I 87, II 12–34, III 92, IV 97–100, V 95–97, VI 90–95, VII 82–90, VIII 42–47 µm in females, and I 67, II 57, III 57, IV 60, V 52, VI 50, VII 50, VIII 30 µm in males. Abdominal segments I–VII with wax glands on submedian area, width of wax glands on segments I–VII: I 260–262, II 277–282, III 267–272, IV 237, V 225–232, VI 215–225, VII 190–205 µm in females, and I 85, II 95, III 96, IV, V 100, VI 95, VII 85 µm in males.Geminate pores present on abdominal segments I–VII, laterad of each wax gland on submedian area. Pockets continuous.

Vasiform orifice

Triangular, lateral margin emarginated posterior to operculum ( Figure 19 ), Figure 20 (f)), in females 80–82 µm long, 67 µm wide; in males 55 µm long, 50 µm wide; operculum subcircular, slightly emarginated posteriorly in middle, filling nearly half the length of the orifice, in females 37–42 µm long, 52–55 µm wide; in males 32 µm long, 37 µm wide, little wider than long; lingula exposed, apex reaching beyond posterior margin of the vasiform orifice, or overlapping the orifice wall, 18–50 µm long. A pair of setae present at the tip of lingula, 30–32 µm long in females, 20 µm long in males.

Venter

A pair of ventral eighth abdominal setae present ( Figure 20 )), bases visible, located ventrally beneath cephalolateral margin of vasiform orifice, 40 µm apart. Legs curved, with apical pads. Antennae extending inside and reaching beyond middle of the prothoracic legs, 175 µm long in females, 187 µm long in males, keel 5 µm long.

Chaetotaxy

Anterior marginal setae 27 µm long, posterior marginal setae not discernable. Cephalic and first abdominal setae absent. Eighth abdominal setae cephalolaterad and parallel to base of vasiform orifice, caudal setae minute, 7 µm long, 45–47 µm apart.

Host plant

Unidentified.

Material examined

Holotype ‘puparium’; Holotype. Malaysia: Sarawak, Gunung Mulu National Park , 1 male and 2 female puparia under one cover slip, on unidentified plant, September–October 1977, D. Hollis (50/82). The female puparium located alone in the second row is the holotype.

Paratypes

Two puparia (1 male, 1 female) from the first row are paratypes. Data same as for the holotype.

Distribution

Malaysia.

Etymology

The species is named after the state of the type locality: Sarawak, Malaysia.

Remarks

Puparia of the new species are dimorphic; the female puparia are larger than the male puparium.

Figures

Figure 19. Paramarginatus sarawakensis Dubey gen. and sp. nov., holotype puparium, line drawings: (a) dorsal view; (b) margin; (c) abdominal segments, wax glands; (d) vasiform orifice, lingula.

Figure 20. Paramarginatus sarawakensis Dubey sp. nov., holotype puparium: (a) dorsal view; (b) cephalothorax; (c) margin; (d) abdominal wax glands; (e) abdominal segment sutures, glands; (f) vasiform orifice, lingula; (g) ventral setae.