Valid Names Results

Acanthomytilus imperatae (Kuwana, 1931) (Diaspididae: Acanthomytilus)

Nomenclatural History

• Lepidosaphes imperatae Kuwana 1931b: 170. Type data: JAPAN: Ryukyu Islands, Amami-O-Shima, Somachi-mura, on Imperata arundinaceae, 27/10/1930, by S.I. Kuwana. 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.
• Acanthomytilus imperata (Kuwana, 1931); Takahashi 1956a: 60. change of combination and misspelling of species epithet

Common Names

Ecological Associates

Hosts:

Families: 2 | Genera: 4

Geographic Distribution

Keys

• Takagi1960: pp.100 ( Adult (F) ) [Key to species of Acanthomytilus of Japan]

Remarks

• Systematics: This species is close to Acanthomytilus intermittens (Hall) and may be a variety of that species. It differs in the color and larger size of the scale, in possessing more gland spines and dorsal gland orifices on the pygidium and in the presence of a short protuberance between the median lobes (Takahashi, 1933). Takahashi (1955e) states that Acanthomytilus imperatae may be identical to A. arii.
• Structure: Female scale elongate, sides nearly parallel, convex; dark brown in color with exuviae pale yellow. Ventral scale well developed, grayish white in color. Scale of male similar to female, but much smaller. Pale brown with pale yellowish exuvia. Adult female elongate, segmentation distinct. Antennae reduced to minute tubercles, carrying one stout bristle and one or two short spines. Mouth parts rather large, rostral loop long. Anterior pair of spiracles with three parastigmatic glands. Free abdominal segments with tubular ducts in the marginal area, and the posterior abdominal segments with a few spinelike marginal tubercles. Female pygidium broadly round; circumgenital glands in five groups: median 3-4, anterior lateral 7-12, posterior laterals 8-10. Median lobes rather large, rounded, widely set apart. The second pair of lobes composed of two lobules, the inner larger, with evenly rounded margin, the outer more conical; third pair of lobes obsolete. The pore prominence lateral of the second lobes indistinct. Gland spines are arranged as follows: two between the median lobes, two between the median and second lobes, two between the second and the marginal prominence where the third lobes should be, two lateral of this prominence and three or more about half way between these and the base of the pygidium. Marginal gland orifices not prominent; arranged as follows: one laterad of the second lobes, two laterad of the fourth pair of gland spines, and two laterad of the fifth pair of gland spines. Anal opening close to the base of the pygidium. Dorsal gland orifices rather small, few in number, spines usual (Kuwana, 1931b).
• General Remarks: Detailed description and illustration by Kuwana (1931b).

Illustrations

Citations