Valid Names Results

Paracoccus gillianae Von Ellenrieder & Stocks, 2014 (Pseudococcidae: Paracoccus)

Nomenclatural History

• Paracoccus gillianae Von Ellenrieder & Stocks 2014: 25-36. Type data: USA: California, San Diego Co., Fallbrook, in nursery on Agave sp., ?/?/2010, by T. Ellis and D. Kellum. Holotype, female, O Type depository: Sacramento: California State Collection of Arthropods, California Dept. Food & Agriculture, California, USA; accepted valid name
• Paracoccus gillinae Von Ellenrieder & Stocks, 2014; Rohimatun et al. 2024: 302. misspelling of species epithet

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 4

Geographic Distribution

Keys

• AhmedPoMi2025: pp.5, 9 ( Adult (F) ) [Florida Pseudococcidae]

Remarks

• Systematics: Adult female of Paracoccus gillianae can be differentiated from the other three New World species recorded on Agavaceae (i.e. P. marginatus, P. reductus, and P. solani) by the presence of 8 pairs of cerarii on abdomen and 1-6 pairs on cephalothorax (8 abdominal and 8-9 cephalothoracic cerarii in P. marginatus; cerarii absent in P. reductus, and 7 or fewer abdominal cerarii and no cephalothoracic cerarii in P. solani). Paracoccus gillianae further differs from P. marginatus and P. reductus by the presence of oral rim ducts in rows across dorsum of thoracic and anterior abdominal segments (restricted to margins in P. marginatus and absent in P.reductus), and from P. marginatus and P. solani by the presence of medial and submedial oral rim ducts on venter between meso- and meta-thoracic leg bases (absent in both P. marginatus and P. solani). Adult female of P. gillianae differs from that of P. glaucus from New Zealand, also recorded from Agavaceae, in having (a) oral rim ducts on the dorsum (oral rim ducts absent from dorsum in P. glaucus), and (b) cerarii on head, if present, not well defined, with the cerarian setae more slender and the trilocular pores less numerous and more loosely set than in abdominal cerarii, and never set on a sclerotized area (whereas P. glaucus has 1-3 welldefined pairs of cerarii on the head, each often situated on a sclerotized area). (Von Ellenrieder & Stocks, 2014). Adult male of P. gillianae differs from P. glaucus in (character-states for P. glaucus in parenthesis) (a) possessing multilocular pores near each anterior spiracle (absent), and (b) antennal segments III and IV about three times as long as wide (more than five times as long as wide), and from P. marginatus by the presence of fleshy setae on the legs (all setae on legs bristle-shaped in P. marginatus). (Von Ellenrieder & Stocks, 2014).
• Structure: Body of live adult female grayish, with a coating of powdery white wax; 6-15 pairs of lateral filaments of white wax on margins of abdomen, with a longer pair projecting from posterior-most segment; in older adults only posterior-most pair remains visible. Color of body in alcohol pale pink-orange, turning black in 10% KOH. (Von Ellenrieder & Stocks, 2014)
• Biology: Adult females of P. gillianae produce large amounts of cottony ovisac wax that, in heavy infestations, coalesces into an unsightly mass of wax mixed with females, eggs, crawlers, and males. The mealybugs are generally restricted to the underside of the leaves and infestations are usually heavier on the lower leaves, which appear shriveled, brown, and covered in wax, and can eventually die. Infestations are occasionally attacked by a gregarious hymenopteran parasitoid and by cecidomyiid larvae (Diptera). (Von Ellenrieder & Stocks, 2014)
• General Remarks: Detailed description. photographs and illustrations in Von Ellenrieder & Stocks, 2014.

Illustrations

Citations