Valid Names Results

Hemilecanium imbricans (Green, 1903) (Coccidae: Hemilecanium)

Nomenclatural History

• Lecanium imbricans Green 1903a: 94. Type data: INDIA: Nilgiris, on Ficus mysorensis.. Syntypes, female, Type depository: London: The Natural History Museum, England, UK; accepted valid name
• Hemilecanium imbricans (Green, 1903); Newstead 1908b: 39. change of combination

Common Names

• Powdery giant soft scale KondoJo2022
• Escama blanda gigante pulverulenta KondoJo2022

Ecological Associates

Hosts:

Families: 13 | Genera: 16

Foes:

Families: 3 | Genera: 3

Associates:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• JoshiKo2020: pp.427 ( Adult (F) ) [species of Hemilecanium in the Oriental Region]
• KondoHo2013: pp.509-511 ( Adult (F) ) [Key to adult females of Hemilecanium Newstead]
• KondoHo2013: pp.512 ( First instar ) [Key to known first-instars of Hemilecanium Newstead]
• KondoHa2008: pp.195-197 ( Adult (F) ) [Species of Hemilecanium]
• KondoWi2005: pp.29-30 ( ) [Species of Hemilecanium]

Remarks

• Systematics: The adult female of H. imbricans can be separated from congeners by the following: (i) dorsum with 2 pairs of cribriform plates; (ii) dorsal tubercles, each without satellite ducts on margins and submargins only, totalling 41–66 around body; (iii) preopercular pores numerous (totalling over 110) in a single broad area anterior to anal plates; (iv) stigmatic spines not differentiated from marginal setae; (v) marginal setae conical, sharply spinose, totalling 70–110 on each side between anterior and posterior stigmatic clefts; (vi) ventral tubular ducts in a broad submarginal band; (vii) multilocular pores, mostly each with 10 loculi, abundant around perivulvar region, on all preceding abdominal and thoracic segments, and in a group near antennal base; (viii) antennae each 8-segmented; (ix) dorsal tubular ducts absent; and (x) dorsum with 2 large areas of sclerotization, on mid-dorsum just anterior to anal plates and around anal plates. (Kondo & Joshi, 2022)
• Structure: Adult female subcircular, slightly convex, sometimes somewhat asymmetrical when developing in a crowded colony. Body dark brown, with a pattern formed with white powdery irregular patches on dorsum; patches larger and irregular in shape in medial areas, smaller and more regular in submarginal areas. Margin with thick wax filaments, which break off as female grows. With age, dorsum becoming densely chitinous. (Kondo & Joshi, 2022)
• Biology: Hemilecanium imbricans reproduces sexually. Low levels of infestation are observed during October– December; numbers gradually increase and peak at the end of April–May. The mixture of developmental stages found together indicates multiple overlapping generations per year. (Kondo & Joshi, 2022)
• Economic Importance: The species has the potential to become a serious pest, particularly on mango. (Kondo & Joshi, 2022)
• General Remarks: Good description and illustration of the adult female given by Hodgson (1969b).

Illustrations

Citations