Valid Names Results

Madarococcus cavellii (Maskell, 1890) (Eriococcidae: Madarococcus)

Nomenclatural History

• Gossyparia cavellii Maskell 1890: 147. Type data: NEW ZEALAND: North Island, Rimutaka Mountains, near Wellington. Lectotype, female, by subsequent designation (DeitzTo1980,45). Type depository: Auckland: New Zealand Arthropod Collection, Landcare Research, New Zealand; accepted valid name
• Gossyparia cavellei Maskell, 1890; Fernald 1903b: 68. misspelling of species epithet
• Nidularia cavellii (Maskell, 1890); Lindinger 1933a: 108. change of combination
• Eriococcus cavellii (Maskell, 1890); Hoy 1962: 6, 22, 31, 52. change of combination Illustr.
• Acanthococcus cavellii (Maskell, 1890); Miller & Gimpel 1996: 599. change of combination
• Madarococcus cavellii (Maskell, 1890); Hardy, Beardsley & Gullan 2008: 379. change of combination

Common Names

• purple beech scale Miller1925

Ecological Associates

Hosts:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• HardyGuHo2008: pp.375-376 ( Adult (F) ) [Key to species of Madarococcus based on adult females]
• Hoy1962: pp.31 ( Adult (F) ) [Eriococcidae of New Zealand] Key as: Eriococcus cavelli

Remarks

• Systematics: Slide-mounted adult female with: enlarged setae elongate with rounded or acute apices scattered over surface all approximately same size; each dorsal enlarged seta with 1 or more associated microtubular ducts near base; suranal setae spatulate (Hoy, 1962). Madarococcus cavellii is most easily confused with M. hispidus. Both species are characterised by numerous spinose setae on the lateral areas of the venter. This feature is apparent even on the first-instar nymphs of M. cavellii (all ventral setae are minute and slender in the first-instar nymphs of M. hispidus). The adult female of M. cavellii can be distinguished from that of M. hispidus by 1, hind coxae much larger than fore or mid coxae (coxae of all legs subequal in M. hispidus); 2, majority of ventral disc pores quinquelocular (most disc pores trilocular in M. hispidus), and 3, ventral abdominal setae short and robust (longer and flagellate in M. hispidus). (Hardy, et al., 2008)
• Structure: Adult female rotund, dark purple in color. Crushed insect is a rich crimson color. Female of the second stage is active, naked, dark crimson. Male pupae enclosed in cylindrical loosely felted cottony sac that is pure white. Adult male is orange-yellow, darker on thorax than the abdomen (Maskell, 1890). Sac is yellow to grayish in color, loose and cottony (Hoy, 1962). Ruth C. Henderson discovered that Maskell’s dry material of this species (slide-mounted by Hoy for his 1962a revision) had been a mixed series of both M. cavellii and M. nelsonensis (Henderson & Martin 2006). Thus there is some uncertainty concerning whether Maskell (1890) and later Hoy (1962a) accidentally described the test of M. nelsonensis as if it belonged to M. cavellii. A further complication is that recent collections by N. A. Martin and Ruth C. Henderson show that there is some variation among populations of M. cavellii in the degree of waxy covering and stem distortion caused by the adult female depending on its Nothofagus host and its locality. (Hardy, et al., 2008)
• General Remarks: Detailed description and illustration by Hoy (1962). Detailed type information in Deitz & Tocker (1980).

Illustrations

Citations