Eucalymnatus tessellatus ( Signoret, 1873 )

Choi, Jinyeong, Soysouvanh, Pheophanh, Lee, Seunghwan & Hong, Ki-Jeong, 2018, Review of the family Coccidae (Hemiptera: Coccomorpha) in Laos, Zootaxa 4460 (1), pp. 1-62 : 35

Eucalymnatus tessellatus ( Signoret, 1873)

( Figs 30 , 31 )

Lecanium tessellatum Signoret, 1873: 401 .

Diagnosis. Dorsum with setae bluntly spinose ( Fig. 31B ); duct tubercles present ( Fig. 31A ). Marginal setae spinose, with pointed or fimbriate apices ( Fig. 31I ). Venter with multilocular disc-pores each usually with 7 loculi, present around vulvar area and few on anterior area of abdomen ( Fig. 31E ); pregenital setae numbering 1 pair ( Fig. 30D ); antenna 7 or 8 segmented ( Fig. 31J ) (partially adopted from Hodgson 1994).

Material examined. 1 ♀, LAOS, Saythany Dist. , Vientiane Capital, 25.ii.2017, coll. P.P. Soysouvanh, on Gardenia sp. ( Rubiaceae ).

Hosts. Polyphagous. According to García Morales et al. (2016), E. tessellatus has been recorded from plants belonging to 109 genera in 54 families.

Distribution. All zoogeographical regions; Oriental Region ( India, Indonesia, Malaysia, Taiwan, Thailand, and Vietnam) ( García Morales et al. 2016); Laos (new country record).

Economic importance. Eucalymnatus tessellatus has been reported as a minor pest on ornamental plants in California ( Gill 1988) and Florida ( Hamon & Williams 1984).

Remarks. Gill et al. (1977) noted that the teneral adult female of Eucalymnatus tessellatus , without the sclerotisation of the polygonal plates, is similar to C. longulus (Douglas) but differs from it by lacking subdiscal setae on the anal plates.

Figures

FIGURE 30. Eucalymnatus tessellatus (Signoret, 1873). A, female in life; B, slide-mounted adult female; C, polygonal plates; D, pregenital setae. Scale lines for B = 0.5 mm; C = 200 µm; D = 100 µm.

FIGURE 31. Eucalymnatus tessellatus (Signoret, 1873), adult female, from Williams & Watson (1990). A, dorsal tubercle; B, dorsal seta; C, dorsal microduct; D, anal plates; E, multilocular disc-pore; F, ventral microduct; G, leg; H, spiracular disc-pore; I, stigmatic spines and marginal setae; J, antenna.