Rudisculptus Dubey, 2021

Dubey, Anil Kumar, 2021, New whitefly genus and species (Hemiptera, Aleyrodidae) breeding on Orophea katschallica Kurz in India, European Journal of Taxonomy 787, pp. 1-16 : 3-4

Genus Rudisculptus Dubey gen. nov.

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Type species

Rudisculptus caudalis gen. et sp. nov.; by present designation and monotypy. Gender: masculine.

Diagnosis ( Figs 2–6 )

In life, puparia black; without secretion of wax over dorsum, wax secretions are seen around caudal tracheal pore; elevated by lateral submargin; submargin merging with subdorsum by a ridge at dorsolateral angle; submargin hidden in dorsal aspect ( Figs 2 , 5B ). Dorsal surface ornamented with reticulated network of tubercles. Submarginal bands of microtubercles present. Laterally elevated submargin expands and folds in mounted puparia and thus, placing the true margin ventrally. Thoracic tracheal pores indicated as small openings at true margin, and marked as deep loops on dorsal submargin, filled with fine microtubercles. Longitudinal moulting suture reaching margin and transverse moulting sutures reaching subdorsal-submarginal demarcation, cephalothorax separated from the submargin in mounted specimens ( Fig. 4G ); cephalothoracic and abdominal segment sutures reaching submedian area. Anterior marginal setae absent and posterior marginal setae located ventrally on true margin. Cephalic, first, eighth abdominal and caudal setae present, caudal setae located at ventrolateral margin. Vasiform orifice subcordate; operculum covering little more than half the length of the orifice; lingula exposed, tonguelike, tip may reach beyond the margin of the orifice. Caudal furrow prominent. Geminate pores present. Ventral submargin marked with a narrow groove except caudal fold area.

Etymology

The genus epithet is a summative of two Latin words ‘ rudis ʼ and ‘ sculptus ʼ meaning ‘rough’ and ‘sculpted’ attributing to the dorsal surface of puparium seen in the SEM images ( Fig. 5B ).

Remarks

Puparia of the new genus differ from those of Aleuropleurocelus and Tetralicia Harrison, 1917 in having a smooth true margin and the presence of first abdominal setae, with thoracic tracheal pores indicated at the margin, prominent caudal furrow, a differentiated cephalothorax in some slide mounts, the submargin is demarcated from the dorsal disc at the anterolateral angle by a shallow ridge, the subventral area is demarcated from the narrow submarginal area by a shallow groove, and the thoracic and caudal tracheal folds are not marked with spinules. In the new genus, the inner wall of the vasiform orifice has digitiform projections, the thoracic tracheal pores are clearly indicated at the margin with an extended loop on the submargin, filled with microtubercles and lacking submarginal wax secreting glands, but in Aleuropleurocelus , the inner wall of the vasiform orifice is smooth, the tracheal pore areas are not modified at the margin and the marginal teeth have wax glands at the base. The new genus also differs from Regiominutus Dubey, 2020 in the puparial shape, size, vasiform orifice structure, and in lacking submarginal papillae and a ventral submarginal groove. A comparison of pupal morphological characters with related genera are presented in Table 1 .

Figures

Fig. 2. Rudisculptus caudalis gen. et sp. nov., puparium, paratype (ANRC-ZSI), habitus on leaf.

Fig. 3. Rudisculptus caudalis gen. et sp. nov., ♀, holotype (ANRC-ZSI), line drawings. A. Dorsal and ventral views. B. Diagrammatic presentation of puparium on leaf in lateral view. C. Thoracic tracheal pore. D. Vasiform orifice.

Fig. 4. Rudisculptus caudalis gen. et sp. nov., slide mounts. A. Puparium, ♀, holotype (ANRC-ZSI). B. Puparium, paratypes (ANRC-ZSI). C. Thoracic tracheal pore (PT). D. True margin. Pore (PT). E. Abdominal segments (HT). F. Moulting suture; seta (HT). G. Cephalothoracic demarcation (PT). H. Posterior abdominal area (HT). Abbreviations: ABS VII = abdominal segment VII; ANT = antenna; FAS = first abdominal setae; GP = geminate pore; HT = holotype; LMS = longitudinal moulting suture; PT = paratype; TMS = transverse moulting suture; TTP = thoracic tracheal pore; 1st ABS = first abdominal setae.

Fig. 5. Rudisculptus caudalis gen. et sp. nov., puparium, not preserved, SEM images. A. Ventrolateral view. B. Dorsal view. C. Cephalothorax. D. Posterior abdominal area. E. Abdominal segment. F. Vasiform orifice.

Fig. 6. Rudisculptus caudalis gen. et sp. nov., puparium, not preserved, SEM images, dorsal and ventral surfaces. A. Microtubercles, dorsal surface. B. Same, enlarged view. C. Geminate pore. D. Cephalic seta. E. Puparium, ventral surface. F. Thoracic tracheal fold. G. Caudal tracheal fold.