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Maskell Scale

Scientific Name
Lepidosaphes pallida
Scientific Author
(Maskell, 1895)
Taxonomy
(Hemiptera: Diaspididae)
Pest Status
0 Unknown
Status
NZ - Exotic
Reliability
High
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Diagnostic Images (7)
Diagnostic Notes
Source: Henderson (2011) [See Web Links tab]

Live appearance and habitat

Female scale cover light yellow-brown or tan, with pale, slender, terminal exuvia lying further forward from position of female body, which is pale, eggs pale. On leaves or base of leaves of its conferous hosts.

Adult Female

Measurements taken from 5 specimens. Body elongate, fusiform, slightly wider at abdomen, prepygidial lobes not particularly developed; length 0.7–1.2 mm, width 0.28–0.47 mm. Median lobes (L1) small, rounded, about as wide as long, notched each side, with slender paraphyses each side extending onto submargin; medial space same width as one median lobe, with 1 pair of setae and 1 pair of gland spines; L2 bilobed, medial lobule 2 times as wide as lateral lobule and with a small notch; L3 crenulations on margin. Gland spines between lobes. 6 pairs of marginal macroducts.

Dorsal ducts of 1 size, smaller than marginal macroducts, few distributed on submedial pygidium VI and on submedian to segment II, with a gap to submarginal ducts on V to as far forward as metathorax. Dorsal bosses absent. Anal opening small, oval, 10–12 µm, positioned near anterior of pygidium, 115–125 µm from posterior margin.

Ventral ducts similar to dorsal ducts but smaller, present submarginally on prepygidial segment I and metathorax near posterior spiracle with a few on mesothorax, without a band extending across body between posterior spiracles. Microducts few, scattered on submargins of abdomen and head, and on submedian abdomen. Gland spines on margins of free abdominal lobes few, reducing to fairly numerous gland tubercles anteriorly. Antenna with 1 or 2 long setae. Anterior spiracles each with 2–5 trilocular pores; posterior spiracles without pores. Perivular pores in 5 moderately elongate groups, with a total 21–24 pores on each female. Vulva position posterior to that of anal opening, at about 1/3 or 62–67 µm from posterior margin.

Source: [ScaleNet](http://scalenet.info/)

General Remarks

Detailed descriptions and illustrations by Kuwana (1925a), Balachowsky (1954e) and Takagi (1970). Table of taxonomic characters distinguishing conifer infesting species of Lepidosaphes in Miller, Williams & Davidson (2006).

Structure

Adult female body slender, with the metathorax and basal 4 abdominal segments gently lobed laterally and with the pygidium rather of the shape of a trapezoid. Median lobes as long as wide, with the apical margin convex, and with a slight notch on each side (Takagi, 1970).

Keys

Miller et al. 2006: 35-37 (female) [Key to the conifer infesting species of Lepidosaphes]; Gill 1997: 169 (female) [Key to California species of Lepidosaphes]; Kosztarab 1996: 517 (female) [Key to species of Northeastern North American Lepidosaphes]; Danzig 1993: 247 (female) [Key to species of Lepidosaphes]; Chou 1982: 156 (female) [Key to Chinese species of Lepidosaphes]; Paik 1978: 337 (female) [Key to species of Lepidosaphes]; Williams 1971: 449 (female) [Key to species of Insulaspis on Coniferae]; Takagi 1960: 92 (female) [Key to species of Lepidosaphes]; McKenzie 1956: 33 (female) [Key to species of Lepidosaphes]; Takahashi 1955e: 70 (female) [Key to species of Lepidosaphes]; Balachowsky 1954e: 34 (female) [Tableau de détermination des espèces du g. Lepidosaphes]; Borchsenius 1950b: 184 (female) [Key to species of Lepidosaphes]; Zimmerman 1948: 418 (female) [as Lepidosaphes maskelli; Key to species of Lepidosaphes reported in Hawaii]; Kuwana 1925a: 5 (female) [Key to species of Lepidosaphes]; Green 1896e: 77 (female) [as Mytilaspis pallida; Key to species of Mytilaspis of Ceylon].
More Information
Specimen Contact
New Zealand Arthropod Collection
Author
Henderson, R. C. & Crosby, T. K.
Created
26/05/2011 12:34 AEST
Last Updated
10/04/2014 01:28 AEST
Citation
Henderson, R. C. & Crosby, T. K. (2011) Maskell Scale (Lepidosaphes pallida) Updated on 4/10/2014 1:28:34 AM Available online: PaDIL - http://www.padil.gov.au.
Image Use
Free for use under the Creative Commons Attribution 3.0 Australia License

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