Atrococcus groenlandensis Gertsson & Hodgson

• Main Authors: Gertsson, Carl-Axel, Hodgson, Chris
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2005
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Hemiptera; Pseudococcidae; Atrococcus; Atrococcus groenlandensis; Arctic
• Online Access: https://doi.org/10.5281/zenodo.3506992; http://treatment.plazi.org/id/03B37C0A0256FFF9260018D5FDD25817

ATROCOCCUS GROENLANDENSIS Gertsson & Hodgson spec. nov (Fig. 1) (Described mainly from 3 specimens in good condition) Unmounted material . Not known. Mounted material . Oval in outline, 1025–2600 µm long and 500–1000 µm wide; anal lobes moderately developed; antennae 8 ­segmented; legs normally developed; circulus absent; with 2 pairs of distinct cerarii plus a third which may be undifferentiated; oral rim ducts present. Dorsum . Membranous, with frequent fine setae, each mainly 10–21 µm long but with some on head up to 27 µm. Trilocular pores quite frequent and fairly evenly distributed. Simple (discoidal) pores scarce throughout; also with 2 small convex pores dorsad to each scape. Cerarii clearly present on abdominal segments VII and VIII, each with two stout spinose setae (stoutest on VIII), length of cerarian setae on VIII 10–18 µm; with 5–6 auxiliary setae, longest about 33–40 µm; cerarian setae on segment VI barely differentiated from other setae, possibly sometimes absent. Ostioles membranous, each lip with 5–8 trilocular pores and 0–2 small setae. Oral rim ducts each 8 µm wide, distributed as follows: VIII 0; VII 4–6; VI 1 or 2; V & IV 2–4; III – I 1–6; meta­ to prothorax 2–6; head 6–8. Oral collar ducts of two sizes; larger ducts (each about 3 µm wide and 8 µm long) restricted to a small group marginally on abdominal segments II –VIII, each group with 1–5 ducts, most abundant on posterior segments; smaller ducts (each about 1.5 µm wide and 6–7 µm long) in transverse lines across abdominal segments, most abundant on segments IV & V. Multilocular disc­pores 6–7 µm wide, with 0 to about 12 on abdominal segments I –VII, mainly near margin but with up to about 6 along posterior margins of segments IV –VII. Anal ring 64–70 µm wide, with 6 setae, each about 100–125 µm long. Venter . Membranous, with frequent fine setae, each 20–85 µm long, but some on head up to 110 µm; suranal setae 36–50 µm long; long anal lobe setae each 140–220 µm long. Trilocular pores frequent and fairly evenly distributed. ...