Aleuromarginatus glandulis 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 : 2617-2621

Aleuromarginatus glandulis Dubey sp. nov.

( Figure 5 )– Figure 6 (f))

Puparium (n = 7, 5 female, 2 male)

Elongate-oval ( Figure 5 ), Figure 6 (a)), posterior end narrower than anterior, slightly wider at region of transverse moulting suture to abdominal segment V; sexually dimorphic, 1120–1250 µm long, 650–720 µm wide in female, 950–1010 µm long, 550–560 µm wide in male.

Margin

Smooth ( Figure 5 )); thoracic tracheal pore opening areas slightly invaginated from margin and modified into comb of 6–9 modified teeth ( Figure 5 ), Figure 6 (d)) and caudal tracheal comb of 5–6 teeth.

Dorsum

Dorsal surface nearly smooth, appears mildly coarse, without tubercles. Submargin with many fine lines, limited to narrow submarginal area ( Figure 6 )). Longitudinal moulting suture reaching near margin and transverse moulting suture reaching outer subdorsal area near bases of submarginal lines. Pro-mesothoracic suture prominent, meso-metathoracic suture faintly visible. Submedian pockets on pro-mesothoracic sutures broad and associated with cuticular folds. A pair of longitudinal wax glands present on submedian area of abdominal segments I–VIII ( Figure 6 )). The median length of the mesothorax was greater than that of the metathorax in both male and female puparia. Mesothorax length 112–127 µm in females, 100–105 µm in males, and metathorax length 70–75 µm in females, 57–70 µm in males. Median length of abdominal segments I–VIII in female: I 45–52, II 30–55, III 52–62, IV 55–65, V 55–62, VI 21–47, VII 0, VIII 67–80 µm; and in male: I 37–40, II 37–40, III 42–47, IV 45–50, V 45– 50, VI 32–47, VII 0, VIII 57 µm. The greatest median length was observed for abdominal segment VIII, and the smallest for segment VI. Abdominal segments VII completely reduced in median length. Median length for abdominal segments I–VIII observed as: VIII> IV = III> V> II> I> VI> VII. Distance between posterior margin of vasiform orifice and caudal tracheal pore opening 162–190 µm in female, 130–137 µm in male. Submargin with 28–35 pairs of pores, number of pores varies on left side (28–29 pairs) vs right side (30–35 pairs) of the puparium. One pair of geminate pores present between submedian setae on submedian area of abdominal segments I–VIII, except on segment VII, a row on submargin, two rows on submedian/subdorsal area and a few scattered on subdorsum. Caudal and thoracic tracheal furrows absent. Pockets on abdominal segment VII discontinuous. Geminate pore pairs are of equal size, spacing 2–5 times the pore diameter.

Vasiform orifice

Elongate-triangular, posteriorly narrow, conical, not notched, inner posterior and lateral margin with ridges ( Figure 5 ), Figure 6 (e)), 75–80 µm long, 57–60 µm wide in female; 70 µm long, 50 µm wide in male; operculum subcordate to subcircular, posteriorly truncate, somewhat straight, covering nearly half the length of the orifice, 30–40 µm long, 40–45 µm wide in female, 25–32 µm long, 35–37 µm wide in male. Lingula exposed, setose, not reaching beyond the posterior margin of the vasiform orifice, 12–17 µm long; a pair of setae subapically, 12 µm long.

Venter

Ventral submargin with narrow fold in some places. A pair of ventral abdominal setae 18– 32 µm long, 50–80 µm apart. Ventral eighth abdominal setae located mediolateral to vasiform orifice ( Figure 6 )), lateral to the exposed middle part of lingula. Rostral setae present cephalad of rostrum, 12–18 µm long, 7 µm apart. One minute seta present in middle of meso- and metathoracic legs, 7 µm long. Antennae extending to outside of the prothoracic legs, 92–102 µm (including keel 5–7 µm long) long, and reaching near base of prothoracic legs ( Figure 5 )).

Chaetotaxy

Anterior marginal setae absent. Posterior marginal setae 15–20 µm long, 115 µm apart. Cephalic setae and the first abdominal setae 5–7 µm long, cephalic setae apically pointed or blunt, the first abdominal setae 5 µm long, eighth abdominal setae cephalolaterad of vasiform orifice and below the baseline of operculum, fine hair-like, 5 µm long. Submarginal and submedian setae 5–7 µm long. The submedian pair of setae on abdominal segment II dislocated on submargin. Caudal tracheal fold densely stippled ( Figure 5 (c)).

Host plant

Papillionaceae: Bauhinia sp.

Material examined

Holotype ‘puparium’; West Malaysia, Pahanng Province, Tiomen Island , near Kampung Tekek, two puparia on a slide, on Bauhinia sp. , upper surface in pits, vine, 18 February 1985, J.H. Martin (4513A) ( NHM). The female puparium (larger) is selected as the holotype and is located on the left side of the male puparium (smaller).

Paratypes

Data same as the holotype. Six puparia on three slides (one male puparium with holotype on slide 1, two female puparia on slide 2, two male and one female puparia on slide 3) (NHM).

Distribution

Malaysia.

Etymology

The species is named after the abdominal wax glands. The species epithet is a Latin word, ‘ glandulis ’, referring to the glands.

Remarks

Puparia of this species form pits on the upper surface of Bauhinia leaves. The new species differs from all other Aleuromarginatus species in having oval elongate puparia with smooth margin, abdominal segment VI much reduced so that pockets are almost overlapping the segment suture VI/VII, group of wax-secreting gland patches present on the abdominal submedian area and the caudal tracheal fold is densely stippled. The new species differs from A. millettiae Cohic, 1968 in having prominent tracheal combs, wax glands on abdominal segments, posterior end narrower than anterior, and the dorsal surface with wavy lines (in A. millettiae , wax glands are absent but lateral longitudinal furrows are present on abdomen only and sometimes with two lateral arms posteriorly ( Bink-Moenen 1983, 61), posterior end as broad as anterior, and the dorsal surface with circular tubercles).

Figures

Figure 5. Aleuromarginatus glandulis Dubey sp. nov., holotype puparium, line drawings: (a) dorsal view; (b) thoracic tracheal comb; (c) vasiform orifice, stipples (ventral); (d) legs, antenna.

Figure 6. Aleuromarginatus glandulis Dubey sp. nov., holotype puparium: (a) dorsal and ventral views; (b) cephalothorax, eye spots; (c) abdominal segments, wax glands; (d) thoracic tracheal comb; (e) vasiform orifice; (f) ventral fold, setae.