Valid Names Results

Eulecanium cerasorum (Cockerell, 1900) (Coccidae: Eulecanium)

Nomenclatural History

• Lecanium cerasorum Cockerell 1900f: 71. Type data: JAPAN: Intercepted at San Francisco, California, U.S.A., on cherry tree.. Syntypes, female, Type depository: Washington: United States National Entomological Collection, U.S. National Museum of Natural History, District of Columbia, USA; accepted valid name
• Eulecanium cerasorum (Cockerell, 1900); Fernald 1903b: 184. change of combination
• Lecanium (Saissetia) cerasorum; Reh 1903: 417. subsequent use
• Eulecanium cerosarum (Cockerell, 1900); Takahashi & Tachikawa 1956: 5. misspelling of species epithet
• Eulecanium cerasorium (Cockerell, 1900); Quesada & Sadof 2017: 618. misspelling of species epithet

Common Names

• calico scale Gill1988 Stimme1986a
• escama blanda del percal KondoGaWa2022
• nashi-madara-tama-kaigaramushi KondoGaWa2022

Ecological Associates

Hosts:

Families: 9 | Genera: 11

Foes:

Families: 1 | Genera: 3

Geographic Distribution

Keys

• DuroviSpUl2024: pp.490-491 ( Adult (F) First instar Second instar (F) Second instar (M) ) [Eulecaniinae in Ankara]
• Koszta1996: pp.345 ( Adult (F) ) [Northeastern North America]
• Tang1991: pp.158 ( Adult (F) ) [China]
• Gill1988: pp.40 ( Adult (F) ) [USA, California]
• Kawai1980: pp.160-162 ( Adult (F) ) [Japan]
• Borchs1957: pp.389 ( Adult (F) ) [Palaearctic region]

Remarks

• Systematics: Subfamily: Eulecaniinae (Choi & Lee, 2019) Eulecanium cerasorum can be differentiated from congeneric species by the following combination of features: (i) multilocular pores on thorax; (ii) dorsal tubular ducts present; and (iii) adult females dark brown or black, mottled with white or yellow spots. It is closest to Eulecanium excrescens (Ferris), but they can be differentiated because E. excrescens has more abundant multilocular pores on venter of thorax, and abundant dorsal tubular ducts (fewer in E. cerasorum). Also, the dorsum of adult females of E. excrescens is covered with mealy, white wax (E. cerasorum without mealy wax on dorsum). (Kondo, Gavrilov-Zimin, et al., 2022)

  First-instar nymph body oval, light orange-red. Slide mounted body oval. It has dorsal microducts, each associated with a simple pore, in two lines (submarginal and submedial) running from the head apex to the anal lobe. In contrast, the first instar nymph of E. ciliatum differs by having the submedial line formed of simple pores not associated with dorsal microducts (or bilocular pores). (Diurović, et al., 2024)

  Second-instar male nymph body elongate oval, dark pinkish; covered with white protective wax test with peripheral fringe, wax plates translucent and highly ornate. The second instar male nymph of E. cerasorum could distingue easily from second instar male nymph of E. ciliatum which inner tubular duct line runs from head to posterior spiracle where inner line of ducts runs from the head to the anal lobes on E. cerasorum.

  Second-instar female nymph oval, pinkish, with translucent wax test that gradually becomes more prominent, especially during the overwintering period. On the dorsum of the second-instar female nymph, tubular ducts form in a line along the body margin, which is highly unusual for second-instar females in the Coccidae. These ducts are not found on the dorsum of second-instar female nymphs of E. ciliatum, with which E. cerasorum shares many other characteristics. (Diurović, et al., 2024)

• Structure: Adult female convex, hemispherical, up to 11 mm long, dark brown or black, mottled with white or yellow spots arranged in four rows on dorsum. Small amounts of white woolly wax secreted from white or yellow spots and anal clefts. In dead insect, dorsum gradually becomes lighter and white or yellow spots become darker and less pronounced. Immature females flat, dark brown, covered with angular transparent wax plates.(Kondo, Gavrilov-Zimin, et al., 2022) Color photograph of adult female by Kawai (1980, Fig. 6.51), Gill (1988) and by Foldi (2003a).
• Biology: Reproduces sexually and develops one annual generation in Northeastern USA (Kosztarab, 1996)(Kondo, Gavrilov-Zimin, et al., 2022).
• General Remarks: Good description and illustration of the adult female given by Gill (1988) and by Kosztarab (1996). Detailed descriptions of nymphal stages in Diurović, et al., 2024.

Illustrations

Citations