Icerya nudata Maskell, 1896

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 : 90-91

Icerya nudata Maskell

Icerya nudata Maskell, 1896: 405 .

Crypticerya nudata (Maskell) ; Cockerell (1899a: 390).

Palaeococcus nudata (Maskell) ; Cockerell (1902a: 233).

Icerya hyperici Froggatt, 1919: 472 . Synonymy by Unruh & Gullan (2008: 43).

Palaeococcus dymocki Froggatt, 1921: 36 . Synonymy by Unruh & Gullan (2008: 43).

Steatococcus nudatus (Maskell) ; Morrison & Morrison (1923: 28).

Steatococcus dymocki (Maskell) ; Vayssière (1926: 307).

Steatococcus hyperici (Maskell) ; Williams & Watson (1990: 33).

Icerya nudata Maskell ; Unruh & Gullan (2008: 41) .

Unmounted material. Adult female yellowish-red to brick red, covered in thin, white, mealy wax that can form tufts. Dorsal surface convex, ventral region swollen, submargin enlarged, forming a ridge (adapted from Maskell, 1896).

Slide-mounted material. Adult female oval. Antennae 10 segmented. Eyes, mouthparts and legs as for tribe; legs with thickened femora. Thoracic spiracles as for genus; derm around atrial opening with 8–12 simple multilocular pores clustered at opening. Hair-like setae scattered on derm, longest marginally and ventromedially. Flagellate setae distributed as for genus. Open-centre pores, each 12–15 µm in diameter, appearing slightly tubular with 5–7 outer loculi and a small cleft, forming clusters on head and margins, densest at posterior abdomen. Simple multilocular pores, each with bilocular (rarely trilocular) centre and 6–12 outer loculi, scattered on derm of dorsum and ventral margins. Marsupial band, incomplete anteriorly, made of short hairlike setae and simple multilocular pores, each with bilocular centre and 4–6 outer loculi. Marsupial cavity with multilocular pores, similar to vulvar pores, each with bilocular centre and 5–8 outer loculi. Simple mul- tilocular pores, each 8–9 µm in diameter, with bilocular centre and 4 or 5 outer loculi, scattered on ventromedial head and thorax. Vulva as for genus. Cicatrices round, numbering 1–3; central cicatrix always present and much larger than lateral ones. Abdominal spiracles in 3 pairs. Anal opening and anal ring as for genus.

Type data. Icerya nudata : AUSTRALIA: New South Wales, ex Cosmos sp. and Verbena sp. (Mr. Olliff). Icerya hyperici : AUSTRALIA: New South Wales, Mudgee, ex St. John’s Wort [= Hypericum perforatum ], 4.x.1917 (W.W. Froggatt). Palaeococcus dymocki : AUSTRALIA: Queensland, Spring Valley, near Hughenden, on basal stems above the roots of a small shrubby plant (M. Dymock).

Type material. Lectotype of Icerya nudata here designated: ad ♀, “ Icerya /nudata/adult female/1895/ W.M.M./Entomology Div., DSIR, NZ ” ( ANIC) . Paralectotypes: 5 embryos (same slide as lectotype); 1 1 st - instar nymph, “ Icerya /nudata/adult female/1895/W.M.M./Entomology Div., DSIR, NZ ” ( NZAC) ; 3 ad ♀♀, “Family Margarodidae / Steatococcus nudatus /(Maskell), adult female/from pillbox labelled:/“ Icerya / nudata / Australia ”/in Maskell’s collection/in NZAC, New Zealand / syntype ”//“Acid fuchsin stain./Mounted in Canada balsam/in xylene. Slide prepared/by P.J. Gullan 1993” ( NZAC) ; 1 ad ♀, 9 1 st -instar nymphs (one slide), “ Icerya /nudata/Mask./ Australia /ex coll. W.M. Maskell ” ( BMNH) .

Lectotype of Icerya hyperici here designated: ad ♀, “Aust. Entomology/ Icerya n sp. /on St John’s Wort/ W.W. Froggatt /Loc. Mudgee/NSW/Coll. 10/4/17” ( ANIC) . Paralectotypes: 2 2 nd -instar nymphs, 2 1 st -instar nymphs (all specimens on one slide), “Aust. Entomology/ Icerya hyperici /n.sp./on St John Wort/10/4/18/Loc. Mudgee/Coll. W W F” ( ASCU) .

Lectotype of Palaeococcus dymocki here designated: ad ♀, “Family Margarodidae / Steatococcus dymocki / (Froggatt), ad ♀ (with marsupium)/ Det. P.J. Gullan /ex drymount with labels:/‘ Palaeococcus / dymocki/Frogg / Queensland’,/ ‘Queensland / Hughendon//Miss M Dymock/ 20.5./1916’ and ‘Type / Cat./Coc. / WWF’ ASCT”//“Acid fuchsin stain/Mounted in Canada balsam/in xylene. Slide prepared/by P.J. Gullan 1999” ( ASCU) . Paralectotypes: 10 1 st -instar nymphs (one slide), same data as lectotype except: “from ad. ♀ ” ( ASCU) ; 2 1 st -instar nymphs (one slide), “666/ Palaeococcus /dymocki n sp/Hughenden/Qued/WWF”// “666/ Palaeococc/larva/Hughen…/26.5.16” ( ASCU); 2 ad ♀♀, “Family Margarodidae / Palaeococcus dymocki /Froggatt, adult ♀ / Syntype, ♀ removed from/mount labelled – ‘666//Queensland / Hughenden / / Palaeococcus / dymocki/1921 / WWF.’/ Steatococcus dymocki (Froggatt) / Det. P.J. Gullan, 1896.”//“Acid fuchsin stain/ Mounted in Canada balsam in/xylene. Slide prepared by/ P.J. Gullan, 1896, from dry/nymphs ex ♀ glued to card/on pin-mount. ANIC, CSIRO/specimen ex collection of/ W.W. Froggatt. ” ( ANIC) ; 2 1 st -instar nymphs (one slide), same data as previous 2 ad ♀♀ except: “first instar nymphs/ex marsupium of adult ♀ / Syntype ” ( ANIC) .

Other material material. AUSTRALIA: ad ♀, 9 1 st -instar nymphs (1 slide), “ Icerya /nudata/Mask./Australia/ex coll. W.M. Maskell ” ( BMNH); ad ♀, 6 1 st -instar nymphs (one slide) (same data as previous slide, except “ Palaeococcus /nudata”) ( BMNH) .

Taxonomic notes. Refer to the taxonomic note on I. assamensis and to I. nudata group for a discussion of similar species.

Refer to Unruh & Gullan (2008) for discussion of this species. Froggatt (1921) described the live appearance of both Maskell's P. nudatus and Froggatt’s P. dymocki . His description of the former matches that given by Maskell (1896), but the adult female of P. dymocki was said to be "light biscuit brown to buff coloured, very lightly covered with mealy secretion, chiefly on the margin and under-surface". These differences may be due to the subterranean habit of the specimens of P.dymocki .