Icerya purchasi Maskell

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 : 93-94

Icerya purchasi Maskell

Icerya purchasi Maskell, 1879: 221 .

Icerya purchasi crawii Cockerell, 1897: 94 .

Icerya purchasi maskelli Cockerell, 1897: 94 .

Icerya purchasi citriperda Hempel, 1920: 337 .

Pericerya purchasi (Maskell) ; Silvestri (1939: 649).

Icerya purchasi purchasi Maskell ; Ben-Dov (2005: 208).

Unmounted material. In life, dorsum of adult female sparsely covered in waxy secretion with medial ridge of wax and segmental waxy tufts projecting from ventral margin around body; glassy filaments also projecting from margins. Ovisac fluted, projecting from posterior of body.

Slide-mounted material. Adult female oval, 5–10 mm long, 4–6 mm wide. Antennae 11 segmented. Eyes, mouthparts and legs as for tribe. Thoracic spiracles as for genus. Dark hair-like setae covering dorsal surface in dense clusters and clustered with open-centre pores around margin; scattered across ventral head and thorax. Flagellate setae as for genus. Open-centre pores, each 16–18 µm in diameter, 15–17 µm long, with 6–8 outer loculi, present in marginal clusters and densely dispersed across dorsal head. Simple multilocular pores, each 9–10 µm in diameter, with bilocular centre and 6–8 outer loculi, covering dorsal surface.Ovisac band made of simple multilocular pores of two types: (i) pores forming inner ovisac band, 2–4 pores wide at anterior edge, 10–12 pores wide around lateral and posterior edges, each pore with bilocular centre and 8–10 outer loculi, and (ii) smaller pores forming outer ovisac band on anterior edge only, 1–3 pores wide, each pore with bilocular or trilocular centre and 4–6 outer loculi; also forming segmental clusters on submarginal ventral abdomen. Simple multilocular pores, each 9–10 µm in diameter, with bilocular centre (appearing reniform) and 4 or 5 outer loculi, scattered on ventromedial head and thorax and scattered across ventromedial to submedial abdomen. Vulva as for genus. Cicatrices round to oval, numbering 3, central cicatrix largest or all subequal in size. Abdominal spiracles in 2 pairs. Anal tube as for genus; anal opening as for genus, surrounded by long, robust hair-like setae.

Type data. Icerya purchasi : NEW ZEALAND: Auckland, ex kangaroo acacia [= Acacia sp. ], iii.1877 (Mr. T.F. Cheesman & Rev. Dr. Purchas). Icerya purchasi crawii : USA: California, ex Citrus ( Alex Craw ). Icerya purchasi maskelli : USA: California, ex Citrus ( Alex Craw ). Icerya purchasi citriperda : BRAZIL: São Paulo State, Soccoro, Jundiahy, Campinas, Jahu, Sorocaba, ex oranges, roses and many other host plants, 1916.

Type material. Lectotype of Icerya purchasi designated by Morales (1991: 57): ad ♀ ( NZAC) . Paralectotypes: 3 ad ♀♀ (2 CMNZ, 1 NZAC), 1 intermediate ♀ ( CMNZ) , 2 1 st -instar nymphs (1 CMNZ, 1 NZAC).

Lectotype of Icerya purchasi citriperda here designated: ad ♀ “ Icerya 20.083/purchasi var./citriperda/n. var./ S. Paulo, 1920” ( MZSP) . Paralectotypes: 3 ad ♀♀ (same slide as lectotype).

Lectotype of Icerya purchasi crawii here designated: ad ♀, “ Icerya /purchasi/ v. crawii Ckll. /Type/Calif./ A. Craw, Coll./Ckll. Coll.” ( USNM) . Paralectotypes: 9 1 st -instar nymphs (one slide) (same data as lectotype) ( USNM) ; ad ♀ “ Icerya /purchasi/ v. crawii /Ckll./TYPE/UCD” ( BME) ; 2 1 st -instar nymph, 6 eggs (all on one slide, left side of slide), “ Icerya /purchasi/var./Maskell Ckll/larva: type./B.M. 1931, 249”// “ Icerya /purchasi/ v. crawii, Ckll /larva/type.” ( BMNH) ; 6 ad ♀♀ (one box of dry material, USNM) .

Lectotype of Icerya purchasi maskelli here designated: ad ♀, “ Icerya /purchasi maskelli/Ckll./Type/Calif./ A. Craw /Ckll. Coll.” ( USNM) . Paralectotypes: ad ♀ (same slide as lectotype); 11 1 st -instar nymphs (one slide) (same data as lectotype, USNM) ; 3 ad ♀♀ (one slide), “B.M. 1931, 249/ Icerya / purchasi, Mask. ,/var./ maskelli, Ckll./TYPE”//“ Icerya /purchasi/ v. maskelli /Ckll./TYPE./B.M. 1931, 249” ( BMNH) ; 4 1 st -instar nymphs, 10 eggs (all on one slide, right side of slide), “ Icerya /purchasi/var./Maskell Ckll/larva: type./B.M. 1931, 249”//“ Icerya /purchasi/ v. crawii, Ckll /larva/type.” ( BMNH) ; 16 ad ♀♀ (one box of dry material, USNM) .

Other material examined. AUSTRALIA: ad ♀, New South Wales, Carwoola , ex Grevillea juniperina 4.i.2003 (P.J. Gullan) ( BME, CMU014 ) ; USA: ad ♀, Alabama, Auburn University , ex Fatsia japonica , 28.ii.2002 (T. Kondo) ( BME, CMU030 ) ; USA: ad ♀, California, Yolo County, Davis, University of California, Davis campus, in front of Mrak Hall , ex Nandina domestica , 3.v.2002 (P.J. Gullan) ( BME, CMU050 ) .

Taxonomic notes. Refer to “ Pericerya ” group for a discussion of similar species. Refer to Morales (1991: 57) for detailed information about type material of I. purchasi .

Type material of I. purchasi is listed incorrectly as syntypic in the World Catalogue ( Ben-Dov, 2005: 208). One slide at the BMNH has first-instar nymphs and eggs of both I. purchasi maskelli and I. purchasi crawii . We have designated the material on the left side as paralectotypes of I. purchasi maskelli and material on the right side as paralectotypes of I. purchasi crawii . The original description of I. purchasi citriperda gives the year of collection (provided above), but the World Catalogue did not include this information ( Ben-Dov, 2005: 207).