Valid Names Results

Discochiton pseudexpansum (Green, 1914) (Coccidae: Discochiton)

Lecanium pseudexpansum Green 1914c: 233. Type data: AUSTRALIA: Northern Territory, Koolpinyah near Darwin, on Pandanus odoratissimus.. Syntypes, female, Type depository: London: The Natural History Museum, England, UK; accepted valid name
Paralecanium pseudexpansum (Green, 1914); Ben-Dov 1993: 207. change of combination
Discochiton pseudexpansum (Green, 1914); Hodgson & Williams 2018. change of combination

Families: 1 | Genera: 1

Countries: 1

Systematics: Lectotype f and paralectotype ff designated in Hodgson & Williams, 2018. D. pseudexpansum is unique in having spinose, non-fan-shaped, marginal setae. Despite this, it is considered to belong to this genus, as indicated by Froggatt’s (1915) observation:“...closely allied in colour, structure, form and size to Lecanium expansum, but differs in having simple marginal setae instead of flabelliform setae ...”. Other significant features are: (i) presence of preopercular pores associated with all four CA, and (ii) long setose dorsal setae. (Hodgson & Williams, 2018)
Structure: Unmounted adult female broad and flat; broadly oval, often of very irregular outline. Color pale fulvous to ochreous; often marbled with dark brown, and usually with a submarginal narrow dark brown zone. Surface (under magnification) minutely pustulate; appearing smooth and shining to the naked eye, but with indications of shallow polygonal depressions covered by glassy concentrically marked plates of colourless secretion.’ (Green 1914, p. 233 referenced in Hodgson & Williams, 2018). Slide-mounted adult female. Body oval to almost round. Length 2.8–5.5 mm, width 2.0–4.5 mm. (Hodgson & Williams, 2018)
General Remarks: Detailed redescription and illustration in Hodgson & Williams, 2018.

BenDov1993: catalog, 207
Frogga1915: distribution, host, taxonomy, 612
Green1914c: description, distribution, host, illustration, taxonomy, 233-234
HodgsoWi2018: description, diagnosis, distribution, host, illustration, key, taxonomy, 56-58
Tang1991: distribution, host, taxonomy, 134
Willia2017a: catalog, list of species, 213