Valid Names Results

Aspidiotus cryptomeriae Kuwana, 1902 (Diaspididae: Aspidiotus)

Nomenclatural History

• Aspidiotus cryptomeriae Kuwana 1902: 69. Type data: JAPAN: Honshu, Gifu-Ken, on Cryptomeria japonica.. Syntypes, female, Type depository: Ibaraki-ken: Insect Taxonomy Laboratory, National Institute of Agricultural Environmental Sciences, Kannon-dai, Yatabe, Tsukuba-shi, (Kuwana), Japan; accepted valid name Illustr.

Common Names

• Cryptomeria Scale Koszta1996

Ecological Associates

Hosts:

Families: 4 | Genera: 13

Foes:

Families: 3 | Genera: 3

Geographic Distribution

Keys

• MillerDa2005: pp.29-30 ( Adult (F) ) [Field Key to Economic Armored Scales]
• Koszta1996: pp.427 ( Adult (F) ) [Northeastern North America]
• Danzig1993: pp.40-41 ( Adult (F) ) [Europe]
• Chou1985: pp.262-263 ( Adult (F) ) [Species of China]
• Takagi1957: pp.32 ( Adult (F) ) [Japan]
• Kuwana1933: pp.3 ( Adult (F) ) [Japan]
• Kuwana1933b: pp.49 ( Adult (F) ) [Japan]

Remarks

• Systematics: GenBank Accesssion number: GU213881 (Dao, et. al, 2020)
• Structure: The scale of the female is usually elliptical, flatly convex. Length 1.1 to 2.0 mm., width about 1 mm.; usual color grayish sub transparent. The exuviae are usually a little to one side of the center; straw color. The first skin usually shows the segmentation distinctly, length about 0.4 mm.; the second skin is more or less covered with secretion, length about 0.65 mm. Ventral scale a mere film applied to bark of plant. The scale of the male is elongated, with the larval skin nearly central; color grayish, same as female in texture; larval skin straw color. Length about 1.0 mm., width 0.6 mm. (Kuwana, 1902).
• Biology: This species infests leaves of the hosts.
• Economic Importance: The Cryptomeria scale is a pest of conifers in Maryland and Pennsylvania, USA (Stimmel, 1986; Davidson & Raupp, 1999; Gardosik, 2001), Japan (Kawai, 1977) and China (Schmutterer et al., 1957).
• General Remarks: Description and illustration of adult female by Kuwana (1902), Kuwana (1933), Ferris (1953), Takagi (1957, 1969a), Danzig (1980b), Tang (1984) and by Kosztarab (1996). Description and illustration of female and male nymphs, and male pupa and prepupa by Stoetzel & Davidson (1974a). This species exhibits in Japan a remarkable host-induced variation in these parameters: variation in Esterase isozymes (Miyanoshita et al., 1991); adult male and female morphology (Miyanoshita et al., 1993; Miyanoshita & Tatsuki, 1995); role of sex pheromone (Miyanoshita & Tatsuki, 2001). Morphological differences and host preference in two forms of Aspidiotus cryptomeriae Kuwana associated with Cryptomeria japonica D. Don and Torreya nucifera Sieb. et Zucc. were examined in the Kanto district, Japan. Adult males and females showed statistically significant differences in some characters. However, it was impossible to divide specimens perfectly by using any one of these characters. Linear discriminant analysis using combinations of several characteristics (>99%) discriminated them. Two sympatric populations of adult females collected at the same stand were correctly classified by linear discriminant functions. Test of forced host preference to five conifers indicated that each population was monophagous. The present study suggests strongly that these two forms are distinct host races. If the same holds true in other parts of Japan, these races might be considered to have differentiated into distinct species (Miyanoshita et al., 1993).

Illustrations

Citations