Chionaspis acer (Takagi and Kawai)

Suh, Soo-Jung, 2016, New records of Chionaspis armored scales (Hemiptera: Diaspididae) in Korea, Insecta Mundi 2016 (489), pp. 1-5 : 2

Chionaspis acer (Takagi and Kawai) ( Figures 1–3 )

Phenacaspis acer Takagi and Kawai, 1966: 112 . Type data: Japan, on Acer palmatum Thunb.

Field Characters. Adult female cover white, flattened, oyster-shell shaped; shed skins marginal, yellow to brown. Male not collected by author.

Slide-mounted Characters. Adult female with 3 pairs of lobes, median lobes lacking a pair of setae between them. Median lobes in the bark-infesting form closely appressed medially from base to one-half of length of lobes, with inverse U-shaped yoke, protruding beyond the second lobes, medial margins parallel basally, diverging apically, lateral margins diverging, with 2-3 lateral notches, with 2 medial notches; in the leaf-infesting form (not examined by author) deeply sunken into the apex of the pygidium, usually not protruding beyond the second lobes ( Takagi and Kawai 1966); second lobes with paraphysis on mesial margin of medial lobule, usually with small paraphysis on lateral margin of medial lobule. Macroducts on pygidium about same size, with 5-6 macroducts on each side of body on abdominal segment 5; with 7 to 9 macroducts on submedial area of segments 3 to 5 each; with 8 to 10 macroducts on submarginal area of segments 3 to 5 each. Gland spines absent on thorax, with 8 to 24 on abdominal segments 1 to 4 each. Perivulvar pores in 5 groups, about 85 pores. Perispiracular pores with 3 loculi, anterior spiracles each with 12 to 14 pores, posterior spiracles each with 3 to 5 pores. Anal opening located at upper of pygidium. Antennae each with 1 conspicuous seta. Body elongated fusiform with prepygidial segments each slightly convex laterally. Only found on Acer L. plants.

Material Examined. Korea. GG: 476, Dongtanjiseong-ro, Yeongtong-gu, Suwon-si, 2 adult females, on Acer negundo (Sapindaceae) bark, 22-iv-2006 (S.J. Suh). JB: Jeonju Arboretum (30-11, Wonbanworangil, Deokjin-gu, Jeonju-si), 7 adult females, on Acer sp. (Sapindaceae) bark, 16-iii-2006 (S.J. Suh).

Distribution. Japan ( García et al. 2015), * Korea.

Figures

Figures 1–9. Habitus and structures of two species of Chionaspis. 1–3: Chionaspis acer (Takagi and Kawai), 1) female, 2) pygidium (bark-infesting form), 3) anterior spiracle. 4–9: Chionaspis wistariae Cooley, 4–5) habitus, 6) female, 7) pygidium of leaf-infesting form with median lobes sunken into the apex of pygidium, 8) pygidium of bark-infesting form with median lobes appressed medially, 9) anterior spiracle.