Valid Names Results

Acanthomytilus miscanthi Takahashi, 1956 (Diaspididae: Acanthomytilus)

Nomenclatural History

• Acanthomytilus miscanthi Takahashi 1956a: 58. Type data: JAPAN: Kyushu, Oita, Tsukumi, on Miscanthus sinensis, 10/08/1953, by T. Tachikawa. Syntypes, female, by subsequent designation Type depository: Sapporo: Entomological Institute, Faculty of Agriculture, Hokkaido University, Japan; accepted valid name Illustr.

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Geographic Distribution

Keys

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

Remarks

• Systematics: Takahashi (1956a) states that this species differs from Acanthomytilus arii in the absence of a median process at the hind end of the pygidium, the larger outer lobule of the second lobe, the fewer parastigmatic pores, the presence of prominent paraphyses at the base of the median lobe and in the larger prominences of the pygidial marginal ducts. It is distinguished from A. imperatae (Kuwana) by the fewer dorsal ducts on the pygidium and the absence of a median protuberance at the hind end of the pygidium.
• Structure: Adult female scale is pale yellowish brown, long, slender, scarcely broadened posteriorly. Body narrow, slightly broadened posteriorly, broadest at 3rd abdominal segment, somewhat convex laterally on basal 4 abdominal segment. Antennae widely apart from each other, with 2 or 3 long setae. Eyes sclerotized, hemispherical. Anterior spiracles with 1 or 2 parastigmatic pores, posterior spiracles without them. Gland tubercles wanting on thorax, about 12 on basal abdominal segment, short conical gland spines 4-6 on 2nd abdominal segment, 4 on 3rd, one on 4th; pygidial gland spines very long, slender, 5 on each side of posterior part, wanting on anterior part. Marginal ducts small, 8 or 9 on mesothorax; ventral lateral ducts numerous on metathorax, the cluster extending beyond the posterior spriracle. Pygidial marginal ducts large, 5 on each side, the anterior one of which is smaller; these ducts prominently protruding, forming pointed tubercles, distinctly larger than dorsal ducts; prominence of last duct located above inner lobule of 2nd lobe. Submedian dorsal macroducts wanting on basal segment, one on 2nd and 3rd segment respectively, 4 or 5 on 4th, 4 on 5th, 3 or 4 on 6th, none on 7th. Submarginal dorsal macroducts wanting on basal abdominal segment 3 on 2nd, 2 on 3rd, one or 2 on 4th, 3 on 5th, 2 on 6th, 1 on 7th; pygidial dorsal ducts with transversely narrowed orifice. Pygidium widely sclerotized on dorsum, wanting a median protuberance at hind end, a little pointed at margin between median and 2nd lobes, with a rounded broad protuberance above lobule of 2nd lobe, which is not sclerotized. Median lobes large, wider than long, broadly rounded at tip, not notched, parallel, much separated from each other; 2nd lobe bilobed, inner lobule large, much wider than long, outer lobule distinctly smaller, longer than wide, rounded apically, 3rd lobe wanting; 2 slender paraphyses present at base of median lobe, which are united anteriorly; a peculiar slender sclerosis arising from mesal paraphysis, which is abruptly extending anteriorly, narrowed anteriorly and with a branch directed laterad. A pair of very short slender paraphyses present at base of inner lobule of 2nd lobe. Venter of pygidium with 3 large distinct dermal thickenings on each side, and with 3 submedian setae on 5th and anterior segments each. Perivulvar pore with 4 or 5 in median cluster, 6 or 7 in latero-anterior cluster, 3-5 in latero-posterior cluster (Takahashi, 1956a).

Illustrations

Citations