Hemilecanium

Adult female body oval to almost round, 2.8–6.0 mm long and 2.25–5.00 mm wide; older specimens becoming strongly convex with two strong shoulders medially. Derm mainly membranous, with large triangular or cone-shaped protuberances medially, each margin about 33–35 µm long and 20–22 µm wide at base, distributed on head, thorax, and abdominal segments I–IV. Dorsum with a submarginal ring of about 30 large dorsal tubercles plus 2–3 submedially on thorax, plus scars left by dorsal tubercles of 2nd-instar nymph. Marginal setae finely spinose, most 6–8 µm long, with well-developed socket; with 8 anteriorly between eyespots, and on each side 2 between eyespots and anterior stigmatic cleft, 2 laterally between stigmatic clefts, and 8 on abdomen. Stigmatic spines present or absent depending on species group; when present, 3 stigmatic spines each clearly differentiated from marginal spinose setae, median much longer than lateral spines. Spiracles proportionately very large, width of peritreme much wider than width of coxae. Each femur with a very long seta near apex on prothoracic leg. Ventral microducts sparse in a broad submarginal band. Anogenital fold with 2 pairs of setae anteriorly.

Literature