Valid Names Results

Eriococcus millei Williams, 2007 (Eriococcidae: Eriococcus)

Nomenclatural History

• Eriococcus millei Williams 2007a: 1353-1356. Type data: NEW CALEDONIA: Belep, on leaves of unidentified plant, 04/06/2004, by C. Mille. Holotype, female, Type depository: Auckland: New Zealand Arthropod Collection, Landcare Research, New Zealand; accepted valid name Notes: The locality Belep, actually a group of islands, lies about 50 km north of the main island of new Caledonia. Illustr.

Common Names

Ecological Associates

Geographic Distribution

Keys

• HodgsoMiCa2014: pp.163 ( Adult (F) ) [Key to Eriococcidae from New Caledonia (modified after Williams, 2007)]
• Willia2007a: pp.1352-1353 ( Adult (F) ) [Key to adult fmal spcis of Eriococcus from New Caledonia]

Remarks

• Systematics: Eriococcus millei is most similar to E. pallidus Maskell described from New Zealand on Myoporum laetum and Elaeocarpus sp. by Maskell (1885) and known from subsequent collections on numerous host plants. E. millei differs from E. pallidus mainly in possessing marginal dorsal enlarged setae that are noticeably longer than the dorsomedial setae (almost twice the length) but in E. pallidus they are mostly about the same size. Furthermore, the enlarged setae in E. millei are acutely pointed whereas in E. pallidus they are bluntly tipped. The anal lobes of E. millei taper much more than those of E. pallidus. In E. pallidus, the anal lobes are more truncate and, whereas the apical setae in E. millei are terminal, in E. pallidus they are situated more to the outer edge. The ovisac of E. millei (as described by Rosa Henderson) is white, long and loosely woven, extending from the rear of the insect. In E. pallidus, it is closely felted covering the insect.(Williams, 2007)
• Structure: External appearance, covered in white wax and with white, long and loosely woven ovisac extending from rear of insect. Body of adult female on microscope slide either broadly oval or with sides subparallel, membranous, 1.15-1.75mm long, 0.65-1.15mm wide, widest at mesothorax or abdominal segment I, with faint minute nodules mainly on head and thorax. Posteriorend rounded except for sclerotized anal lobes, each lobe conical, 60-80 µm long, 33-45 µm wide at base, inner edges crenate, with an apical flagellate seta 75-80 µm long and a dorsal enlarged sub-apical seta about 30 µm long, an inner dorsal, almost basal seta about 45 µm long, an inner subapical ventral seta about 25 µm long, and an outer subapical ventral seta about 25 µm long; all anal lobe enlarged setae noticeably narrower than dorsal enlarged body setae. Antennae 160-200 µm long, six-segmented, segment 3 longest. Legs well developed, hind coxa 50-60 µm long, hind trochanter + femur 130- 160 µm long, hind tibia + tarsus 140-160 µm long. Claw fairly stout, 20-25 µm long, with a single denticle near apex and with two knobbed digitules 32 mm long, noticeably longer than claw, one digitule with large expanded distal end larger than other. Ratio of lengths of hind tibia + tarsus to hind trochanter + femur 1.00-1.07. Ratio of lengths of hind tibia to tarsus 1.00-1.28. Distal trochanteral setae each about 55 mm long. Hind coxa with about 20 translucent pores on posterior surface and a few near outer margin on anterior surface. Hind tibia with a pair of setae at distal end only. Labium much shorter than clypeolabral shield, 60-70 µm long, with three segments, basal segment very narrow with two pairs of minute setae. Anal ring 45-0 µm in diameter, with a single row of cells and six setae each 70-90 µm long. Suranal setae pointed, each about 40 µm long. Each eye about 20 µm in diameter. Dorsal surface with conical enlarged marginal setae, acutely pointed, often slightly curved in profile, mostly 30-35 µm long, 7.5-10.0 µm wide at base, usually two present on margin of each abdominal segment except on abdominal segment VII where usually only one present about 38 µm long and about 10 µm wide at base. Other dorsal setae, same shape but smaller, 15-20 µm long, 5.0-7.5 µm wide at base, present in single rows across middle of segments except scattered on head and prothorax. Macrotubular ducts, each about 15 µm long, 4 µm wide at cup end, present across segments usually in single rows near anterior and posterior edges of abdominal segments and some across middle of abdominal segments near enlarged setae; others becoming scattered on head and thorax. Microtubular ducts elongate, each about 10.0 µm long and scarcely 1.0 µm wide at inner end, scattered over surface. Ventral surface with a series of marginal to submarginal enlarged setae, similar to dorsal setae but most smaller, 15.0 µm long, 6.0 µm wide at base, present singly on abdominal segments, more frequent on thorax; enlarged setae on head margin larger, about 22 µm long. Other setae across segments, flagellate. Macrotubular ducts, same size as dorsal ducts, present in a marginal to submarginal zone. A smaller macrotubular duct, about 12.5 µm long and 2-3 µm wide at cup end, present across abdominal segments and submedially on head and thorax, sparse or absent in medial area of thorax. Microtubular ducts as on dorsum, present around margins and submargins, a few extending medially on thorax. Quinquelocular pores, each about 4.0 µm in diameter, most numerous in medial to submedial areas of abdomen, others present submedially on thorax, and three or four present next to spiracular openings; others scattered medially on head and prothorax. Cruciform pores, smaller than quinquelocular pores, sparsely distributed submedially on head and thorax. (Williams, 2007)
• General Remarks: A detailed description and illustration are found in Williams, 2007.

Illustrations

Citations