Trionymus elymus 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; Trionymus; Trionymus elymus; Arctic
• Online Access: https://doi.org/10.5281/zenodo.3505067; http://treatment.plazi.org/id/03B37C0A025EFFF126001AF5FEE65B6F

TRIONYMUS ELYMUS Gertsson & Hodgson spec. nov. (Fig. 4) (Described mainly from 4 specimens in fair to good condition). Unmounted material . Not known. Mounted material . Elongate oval in outline, 1625–2550 µm long and 675–950 µm wide; anal lobes moderately developed and lightly sclerotised; antennae 8 segmented; legs normally developed; circulus present; with 2 pairs of distinct cerarii; oral rim ducts absent. Dorsum . Membranous, with frequent fine setae, each mainly 8–40 µm long but with some on head up to 70 µm. Trilocular pores 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 2 stout spinose setae (stoutest on VIII), length of cerarian setae on VIII 11–18 µm, those on VII 8–11 µm; with 10–13 auxiliary setae, longest about 75 µm. Ostioles membranous, each lip of posterior pair with about 10–12 trilocular pores and no setae; anterior pair with possibly none on anterior lip and about 12 on posterior lip + 1 or 2 setae. Oral rim ducts absent. Oral collar ducts of two sizes; larger ducts (each about 2.5–3 µm wide, 5 µm long, without a thin inner ductule) frequent throughout, but most abundant on segment VII; smaller ducts (each about 1.5 µm wide, 3–4 µm long, with a long thin inner ductule) in transverse lines across abdominal segments III –VII, with about 10–20 per segment. Multilocular disc­pores 6– 7 µm wide, present as follows: VIII 0–2; VII 6–8; VI 1–7; V 1–4 and IV 0, located almost anywhere on segment. Anal ring 58–67 µm wide, with 6 setae, each about 85–100 µm long. Venter . Membranous, with frequent fine setae, similar in length to those on dorsum, each 11–35 µm long, but some on head up to 70 µm and those around vulva about 50 µm long; suranal setae 48–60 µm long; long anal lobe setae each 135–145 µm long; anal lobe with a small sclerotised bar arising from most anterior seta. Trilocular pores frequent and fairly evenly distributed. Simple ...