Crisicoccus pini ( Kuwana 1902 )

Tanaka, Hirotaka & Kamitani, Satoshi, 2022, Review ofthegenus CrisicoccusFerris (Hemiptera: Coccomorpha: Pseudococcidae) in Japan with description of a new species, and the identity of a South Korean mealybug misidentified as Crisicoccus matsumotoi (Shiraiwa 1935), Zootaxa 5209 (5), pp. 555-572 : 564-567

Crisicoccus pini ( Kuwana 1902)

[Japanese common name: Matsu-kona-kaigaramushi]

Dactylopius pini Kuwana 1902: 54 .

Pseudococcus pini ( Kuwana 1902) ; Fernald 1903: 107 (change of combination).

Crisicoccus pini ( Kuwana 1902) ; Ferris 1950: 46 (change of combination); McKenzie 1967: 127; Kawai 1972: 6; Kawai 1980: 107; Tang 1992: 356; Kosztarab 1996: 94; Kawai 2003: 929; Kwon et al. 2003: 404; Danzig & Gavrilov-Zimin 2015: 202.

Material examined. Japan: Shizuoka Prefecture, Shimizu, Okitsu , on Pinus sp. , 2.vi.1972, coll. S. Kawai, 6 adult females mounted on 2 slides ( KTUA) ; Fukuoka Prefecture, Fukuoka, Nishi-ku, Ikinomatsubara , on Pinus thunbergii , 9.v.2021, coll. H. Tanaka, 14 adult females mounted singly (7 ELKU, 7 EUMJ) .

Updated description

Appearance in life ( Fig. 5 ). Adult female 2‒4 mm long, light orange, covered with white powdery wax. Wax projections from body margin short and indistinct on cephalothorax, and slightly longer on a few segments on posterior part of body.

Slide-mounted adult female ( Fig. 6 ) (n = 20). Body elongate oval, 2.6–4.0 mm long and 1.2–2.0 mm wide; derm membranous; segmentation recognizable, but not well developed. Anal lobes well developed, ventral surface with slightly faint, narrow anal lobe bar and a long apical seta, 130–228 µm long. Antenna 328–451 µm long, with 8 segments and many flagellate setae; subapical segment with 1 fleshy seta and apical segment with 3 fleshy setae. Eyespots present on margin, not associated with discoidal pores. Legs well developed, with many flagellate setae; hind leg measurements (in µm): trochanter + femur 243–348 long; hind tibia + tarsus 255–379; claw 24–34, without a denticle. Ratio of lengths of hind tibia + tarsus to trochanter + femur about 1: 0.91–1.15; ratio of lengths of hind tibia to tarsus 1: 1.90–2.87. Paired setose tarsal digitules present, subequal in length to the minutely knobbed claw digitules. Hind coxa with translucent pores on both surfaces; hind tibia occasionally with translucent pores on posterior surface; hind trochanter, femur and tarsus without translucent pores. Labium 98–165 µm long, shorter than clypeolabral shield. Circulus lacking. Ostioles present, each with inner edges of lips weakly sclerotized; anterior ostioles each with a total for both lips of 12–27 trilocular pores and 2–8 setae; each posterior ostiole with a total for both lips of 13–30 trilocular pores and 2–7 setae. Anal ring 68–88 µm wide, bearing 6 setae, each seta 98–174 µm long. Cerarii numbering 4–7 pairs, all present on abdominal segments.Anal lobe cerarii (C 18) mostly each containing 2 cerarian setae, each seta 14–40 µm long and about 4–8 µm wide at base, 1–6 auxiliary setae and a concentration of trilocular pores. Penultimate cerarii (C 17) each containing 2 conical setae, no auxiliary setae and a few trilocular pores. Cerarii situated further forward generally each with 2 conical setae with a few trilocular pores.

Dorsum. Setae relatively short and flagellate, each 6–39 µm long, usually distributed segmentally; longest setae present on head. Trilocular pores each 3–4 µm wide, evenly distributed. Oral rim tubular ducts absent. Oral collar tubular ducts present or absent, if present, each 2–3 µm wide, located on marginal to submarginal area of posterior abdominal segments. Discoidal pores each about 1–2 µm wide, sparsely distributed.

Venter. Setae relatively long and flagellate, each 7–122 µm long; setae on head longest. Multilocular disc pores, each 6–10 µm wide, present in medial areas of abdominal segments IV‒IX, but occasionally absent from a few anterior segments, arranged in 1–2 rows on posterior area of abdominal segment VII; 0–1 row on anterior area of abdominal segment VII; in 1 row on each posterior area of abdominal segments IV‒VI but arranged randomly on abdominal segments VIII and IX. Trilocular pores, each same size as those on dorsum, evenly distributed. Oral collar tubular ducts all 1 size, each about 2–3 µm wide, present on medial areas of abdominal segments III–VII and usually forming transverse bands across segments, also present on submarginal to marginal areas of posterior abdominal segments. Discoidal pores, same size as those on dorsum, sparsely present.

Host plants in Japan. Pinaceae : Pinus densiflora , P. parviflora and P. thunbergii ( Kawai 1972; 1980; 2003).

Remarks. Crisicoccus pini is similar to C. azaleae in having a small number of cerarii (<13 pairs) and only one size of oral collar tubular ducts. The differential diagnosis of these species is provided in “Remarks” under C. azaleae above.

Figures

FIGURE 5. An adult female of Crisicoccus pini (Kuwana 1902) on a young shoot of Pinus thunbergii.

FIGURE 6. Crisicoccus pini (Kuwana 1902), adult female collected in Fukuoka, Japan in 2021.ALC, anal lobe cerarius; ANT, antenna; DP, discoidal pore; DS, dorsal seta; LG, hind tibia, tarsus and claw; MP, multilocular disc pores; OCD, oral collar tubular duct; PLC, penultimate cerarius (C17); TP, trilocular pore. Scale bars: 200 µm for ANT and LG; 50 µm for ALC and PLC; 10 µm for others.