Icerya seychellarum (Westwood)

Unruh, Corinne M. & Gullan, Penny J., 2008, Identification guide to species in the scale insect tribe Iceryini (Coccoidea: Monophlebidae), Zootaxa 1803 (1), pp. 1-106 : 96-97

Icerya seychellarum (Westwood)

Dorthesia seychellarum Westwood, 1855: 836 .

Coccus sacchari Guérin-Méneville, 1867: 451 . Synonymy by Fernald (1903: 27).

Orthezia seychellarum (Westwood) ; Targioni Tozzetti (1868: 30).

Icerya sacchari (Guérin-Méneville) ; Signoret (1876: 352).

Icerya seychellarum (Westwood) ; Maskell (1879: 329).

Icerya candida Cockerell, 1905: 128 . Synonymy by Morrison (1928: 208).

Icerya okadae Kuwana, 1907: 178 . Synonymy by Green (1922: 440).

Icerya seychellarum cristata Newstead, 1908a: 9 .

Icerya seychellarum seychellarum Ben-Dov (2005: 219) .

Unmounted material. Adult female with dorsal transverse rows of white to yellowish waxy secretion and marginal tufts; glassy filaments projecting from margins and medial dorsum; ovisac projecting from posterior end of body, covered dorsally by a series of long, cylindrical waxy tassels (adapted from Rao, 1951b, Williams & Watson, 1990).

Slide-mounted material. Adult female elliptical, 4.3–6.7 mm long, 3.0– 4.4 mm wide. Antenna 11 segmented. Eyes, mouthparts and legs as for tribe. Thoracic spiracles as for genus, derm at atrial opening with cluster of 7–9 simple multilocular pores, each pore with bilocular centre and 4–6 outer loculi. Robust hair-like setae densest on dorsal head and thorax; regular hair-like setae distributed as for genus, longest between antennae and in marginal clusters. Flagellate setae distributed as for genus, forming transverse rows on ventromedial abdomen. Open-centre pores, each 18–26 µm in diameter, with 14–16 outer loculi and small cleft, in medial clusters on head and thorax and marginal clusters on all body segments; pores in clusters with long, hair-like setae. Simple multilocular pores, each 11–13 µm in diameter, with bilocular centre and 4–6 outer loculi, scattered on head and thorax; similar pores, each 9–10 µm in diameter, scattered on dorsal abdomen. Ovisac band with simple multilocular pores of two sizes: (i) larger pores forming inner ovisac band, each pore 9–10 µm in diameter with bilocular centre and 6–10 outer loculi, and (ii) smaller pores forming outer ovisac band, each pore 7–9 µm in diameter with bilocular centre and 4–6 outer loculi. Simple multilocular pores, similar to smaller pores in ovisac band, each 8–9 µm in diameter with bilocular centre and 4 outer loculi, scattered on ventromedial head and thorax and in transverse rows on ventromedial abdomen. Vulvar opening as for genus, surrounded by long hair-like setae and multilocular pores, each pore with bilocular to trilocular centre and 12–16 outer loculi. Cicatrices round, numbering 3, central cicatrix largest. Abdominal spiracles in 3 pairs. Anal ring and anal opening as for genus.

First-instar nymph as for genus, except anal tube with 8 multilocular pores at opening.

Type data. Dorthesia seychellarum : ENGLAND: imported from the Seychelles Islands , ex palm. Coccus sacchari : MAURITIUS: ex sugar cane. Icerya candida : PHILIPPINES: Manila, ex cultivated tree with large oblong-ovate rought leaves, 4.vi. Icerya okadae : JAPAN: ex orange. I. seychellarum cristata : MADAGAS- CAR: Fenerive ( East Coast Madagascar ), vii.1904 .

Type material. Syntypes of Dorthesia seychellarum : ad ♀♀, material lost ( Unruh & Gullan, 2008: 43).

Syntypes of Coccus sacchari : ad ♀♀, material lost ( Ben-Dov, 2005: 219).

Lectotype of I. candida designated by Unruh & Gullan (2008: 43): ad ♀ ( USNM) . Paralectotypes of I. candida : 2 ad ♀♀ ( USNM, same slide as lectotype); body parts of 1 st -instar nymphs, uncleared 2 nd -instar nymph (1 slide, BME) .

Syntypes of I. okadae : ad ♀♀ ( ITLJ) .

Syntype of I. seychellarum cristata : dried ad ♀ ( ZMB) .

Other material examined. UNION OF THE COMOROS: 2 ad ♀♀ (one slide), “Lot-/H./ Ex coll./Coll./ Mus./Berlin”// “ Icerya /seychellarum/ var cristatum /Mayotte. let/ Comoro Isl. /VoelkRow S./BM 1945, 121” ( BMNH) ; 2 ad ♀♀ (one slide), “Lot-/H/ Ex coll/Zool./Mus./Berlin”//“ Icerya /seychellarum/ var. cristatum / n.var./Mayotte Comoro/ Is. VoelkRow S. /BM 1945, 121” ( BMNH) ; 1 vial with 4 specimens, [3 labels] “Manuscript-No H/ Icerya seychellarum Westw. /ob nene Variet’at?/ Newstead det.”// “ Icerya seychellarum /? var cristatum , nov.var /(Newstead).”//“Coruoveu/Mayotte/VoelkRow S.” ( ZMB) .

Taxonomic notes. Refer to I. seychellarum group for discussion of similar species. Refer to Unruh & Gullan (2008) for detailed information about type material and material used to redescribe this species.