Valid Names Results

Chorizococcus zoysiae Tsai & Wu, 2011 (Pseudococcidae: Chorizococcus)

Nomenclatural History

• Chorizococcus zoysiae Tsai & Wu 2011: 30-39. Type data: TAIWAN: Tainan City, East district, on leaf sheaths of Korean velvet grass (Zoysia tenuifolia), 11/7/2006, by S.K. Chen. Holotype, female, by original designation Type depository: Taipei: Department of Entomology, National Taiwan University, Taipei, Taiwan; accepted valid name Notes: Paratypes: 13 adult females, 13 third-instar females, 8 second-instar females, 4 first-instar nymphs, same data as holotype (NTUT); 3 adult females, same data as holotype (Taiwan Agricultural Research Institute, Wufeng, Taichung, Taiwan); 3 adult females, same data as holotype (BMNH). Illustr.

Common Names

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• TsaiWu2011: pp.29 ( Adult (F) ) [Key to Chorizococcus species on zoysia grasses and Ch. kandyensis]
• TsaiWu2011: pp.29 ( Adult (F) ) [Key to instars of Chorizococcus zoysiae]

Remarks

• Systematics: This new species comes close to Chorizococcus kandyensis (Green, 1922) from Sri Lanka (redescribed by Williams 2004). Both species possess dorsal oral rim tubular ducts extending across head, thorax and abdominal I and II, and ventral multilocular disc pores around vulva only. However, this species possesses 3 pairs of cerarii (Ch. kandyensis possesses only one pair) and oral rim tubular ducts of a single size on venter (Ch. kandyensis possesses oral rim tubular ducts of two sizes), and lack of circulus (present in Ch. kandyensis). The adult female can be distinguished from all other instars by presence of a vulva opening between abdominal segments VII and VIII and by the presence of multilocular disc pores posterior to the vulva and oral collar tubular ducts on ventral abdominal segments. (Tsai & Wu, 2011)
• Structure: Body color dark-brownish, covered with thin white mealy wax. Adult female and older nymphs with white, filamentous wax secretion resembling fur and covering both mealybug and host plant. The third-instar female can be distinguished from the adult female by lacking a vulva, multilocular disc pores, and oral collar tubular ducts; and from earlier instars by bearing seven-segmented antennae. The second-instar female can be distinguished from the third-instar female and adult female by its six-segmented antennae; and from the first-instar nymph by having oral rim tubular ducts. The first-instar nymph can be distinguished from all instars by lacking oral rim and tubular ducts. It shares six-segmented antennae with the second instar, but its antennae are shorter than 130 µm (133-161 µm in second-instar females).(Tsai & Wu, 2011)
• Biology: All stages of this mealybug stayed beneath the leaf sheath. (Tsai & Wu, 2011)
• General Remarks: Detailed description, photograph and illustrations of adult female, 1st-instar, 2nd-instar, and 3rd-instar female nymphs in Tsai & Wu, 2011.

Illustrations

Citations