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Urbicola Soft Scale

Scientific Name
Pulvinaria urbicola
Scientific Author
Cockerell, 1893
(Hemiptera: Coccidae)
Pest Status
0 Unknown
0 Unknown
NZ - Exotic
NZ - Exotic

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Diagnostic Images

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Diagnostic Images (6)
Diagnostic Notes
Source: Williams & Watson (1990)

Adult female in life oval, green, with a ribbed ovisac.

Diagnostic characters of slide-mounted specimens are as follows. Body oval, up to 4.0 mm long, dorsum with large areolations present around submargins, these minute towards median areas, each areolation with a minute pore or occasionally a small duct. Antennae 8-segmented. Legs well developed, each normally with tibia and tarsus strongly articulated, with a tibiotarsal articulatory sclerosis (many South Pacific specimens poorly developed). Anal plates triangular, together quadrate, each plate with outer edges about equal in length, or anterolateral edge slightly shorter than posterolateral edge; median distal edge often with a small notch; with 3 or 4 apical setae present. Stigmatic clefts moderately developed, each with 3 stigmatic setae, the median seta longer than a lateral seta.

Marginal setae each robust at the base, tapering to a point, or with a slightly expanded frayed tip rarely wider than setal base. Dorsal setae pointed, with conspicuous setal collars. Multilocular disc pores, each usually with 7 loculi, numerous in vulvar region, present also in transverse rows on a few preceding segments and in small submedian groups as far forward as the area lateral to the metacoxae. Quinquelocular pores present in stigmatic furrows in single to triple rows. Microducts present in a marginal to submarginal ventral zone and scattered elsewhere on venter. Ventral tubular ducts usually of 3 main types: a small type of duct, with a short filament, mainly situated in submarginal zone; a submedian group of duct, each with a thin filament about 2 times length of duct; and a median-area type of duct, each with a thick filament almost as long and as wide as duct. These ducts occasionally found in all areas, but the most important character is the absence of a submarginal zone of ducts from between the anterior stigmatic furrows except for occasional ducts. Submarginal tubercles often absent but occasionally present in small numbers. Preopercular pores present in elongate group.

Source: [ScaleNet](

Description and illustration of adult female by Zimmerman (1948), Hamon & Williams (1984), Williams & Watson (1990) and by Tanaka et al. (2006).


Tanaka et al. 2006: 180 (female) [Pulvinaria species of Ryuku archipelago]; Williams & Watson 1990: 148 (female) [Tropical South Pacific]; Hamon & Williams 1984: 87 (female) [USA, Florida]; Beardsley 1966: 491 (female) [Micronesia]; Zimmerman 1948: 333 (female) [Hawaii].
More Information
Specimen Contact
New Zealand Arthropod Collection
Henderson, R. C. & Crosby, T. K.
27/05/2011 12:39 AEST
Last Updated
08/07/2011 07:56 AEST
Henderson, R. C. & Crosby, T. K. (2011) Urbicola Soft Scale (Pulvinaria urbicola) Updated on 7/8/2011 7:56:28 AM Available online: PaDIL -
Image Use
Free for use under the Creative Commons Attribution-NonCommercial 4.0 International (CC BY-NC 4.0)