Paralecanium expansum (Green, 1896)

(Figs 32, 33)

Lecanium expansum Green, 1896: 9 .

Diagnosis. Dorsum with setae bluntly spinose or slightly capitate (Fig. 33D); preopercular pores present anterolaterally to anal plates, in 2 groups on each side (Figs 32E, 33G). Stigmatic clefts each containing 3–9 stigmatic spines (Fig. 33A). Legs represented by leg stubs (Figs 32D, 33J) (partially adopted from Green 1904b; Morrison 1920; Tao et al. 1983; Hodgson & Williams, 2018).

Material examined. 30 ♀♀, LAOS, Phou Khao Khuay National Bio-Diversity Conservation Area, Thaphabath Dist., Bolikhamsai Prov., 4.v.2015, coll. J.Y. Choi, on Mangifera indica L. ( Anacardiaceae).

Hosts. Polyphagous. According to García Morales et al. (2016), P. expansum has been recorded from plants belonging to 10 genera in 9 families.

Distribution. Mainly known from Australian and Oriental Regions (Hong Kong, India, Indonesia, Malaysia, Singapore, Sri Lanka and Taiwan) (García Morales et al. 2016); Laos (new country record).

Economic importance. Paralecanium expansum has not been recorded as an economically important pest.

Remarks. Paralecanium expansum closely resembles P. quadratum (Green, 1904b), but has 2 groups of preopercular pores on each side and leg stubs, whereas P. quadratum has 3 groups of preopercular pores on each side and entirely lacks legs (Tao et al. 1983).