Nidularia japonica Kuwana (Kermesidae)

Suh, Soo-Jung & Son, Ah-Ram, 2017, Notes on oak-infesting species of scale insects (Hemiptera: Coccoidea) in Korea, Insecta Mundi 2017 (551), pp. 1-5 : 2

Nidularia japonica Kuwana (Kermesidae)

Nidularia japonica Kuwana, 1918 . Type data: Japan, on Quercus glandulifera .

Field characters. Adult female oval, moderately convex, dark gray to brown, dorsal surface with distinct ridges; matured adult female sclerotized and turtle-shell shaped, dorsal midline ridge, with white and nest-like ovisac covering the sides of body; 2.8–6.0 mm long. Male covered by a loose cottony white wax. Slide-mounted characters. Adult female oval with a single row of spinose marginal setae on dorsal margin; one-segmented antennae each with 7 setae; legs absent; anal ring present on venter, with 6 setae and pores; tubular ducts present on dorsal abdomen; multilocular pores in 1–2 rows present on medial and submedial areas of abdominal segments; 4–5 quinquelocular pores lateral to each anterior spiracle, 1–2 pores medial to each posterior spiracle.

Material examined. Korea. GG: 2850 Unseo-dong, Jung-gu, Incheon-si, 17 adult females, on Quercus dentata (Fagaceae) bark, v-14-2015 ( M. S. Gwak); same data except for iv-5-2016 ( S. J. Suh).

Distribution. China, Japan ( García et al. 2017), * Korea.

Hosts. Fagaceae : Quercus acutissima , Quercus aliena , Quercus dentata , Quercus serrata , Quercus sp. ( García et al. 2017).

Remarks. This species is considered of no-economic importance in Korea.