Heliococcus

Slide-mounted adult female broadly oval, body membranous, 2.5 mm long, 0.95 mm at widest point. With 12 moderately well-developed pairs of cerarii, each situated on a small protuberance and mildly sclerotised, each with 2 spinose lanceolate setae plus 3 or 4 trilocular pores, with 1 pair on each abdominal segment, 1 pair on each thoracic segment and 2 pairs on head; anterior-most pair of cerarii, anterior to eyespots, each with 3 spinose setae, some minute setae and about 8 trilocular pores. Another pair of cerarii on abdominal segment I, not mildly sclerotised and not on a protuberance, each with 2 more widely spaced, lanceolate setae and more dispersed trilocular pores. Dorsum with numerous minute lanceolate setae, each mostly 2.0–2.5 µm long and set in a quite broad basal socket. Crateriform ducts of two sizes: large type with inner ductule about 30 µm long and about 8 µm wide, exterior sclerotised cone about 12 µm long with 1–3 spinose setae, present as a sparse band close to margin; smaller type with inner ductule about 25 µm long, 4 µm wide, exterior cone about 12 µm long with 1–3 spinose setae, present submarginally/submedially in most posterior abdominal segments and on prothorax, and as single ducts medially on most segments. Ventral surface with frequent normal flagellate setae. Labium 143 µm long, similar in length to clypeolabral shield. Ostioles well developed, each lip with a few minute lanceolate setae and a few trilocular pores. Anal ring about 92 µm in diameter, with 3 pairs of setae, each 130–147 µm long. Quinquelocular pores each set in a depression about 7 µm wide, present on abdomen mainly along anterior margins of each segment but also frequent in much of the rest of the venter.

Literature