Valid Names Results

Acanthococcus orariensis (Hoy, 1954) (Eriococcidae: Acanthococcus)

Nomenclatural History

• Eriococcus orariensis Hoy 1954: 465-474. Type data: NEW ZEALAND: Maronan, on Leptospermum scoparium, 13/03/1950, by J.M. Hoy. Lectotype, female, by subsequent designation (Hoy1962,122). Type depository: Auckland: New Zealand Arthropod Collection, Landcare Research, New Zealand; accepted valid name Notes: Although Hoy (1962) refers to examining a holotype, there was no holotype originally designated. Hoy was referring to a slide he had marked as holotype, but correctly should have been designated the lectotype. According to Article 74(a) of the ICZN "any author may designate one of the syntypes as the lectotype, by the use of that term or an equivalent expression..." Illustr.
• Eriococcus manukae Mulcock 1954: 115-118. nomen nudum
• Nidularia orariensis (Hoy, 1954); Lindinger 1958: 368. change of combination
• Acanthococcus orariensis (Hoy, 1954); Miller & Gimpel 1996: 602. change of combination

Common Names

• manuka blight Hoy1961
• manuka scale Wilson1963

Ecological Associates

Hosts:

Families: 1 | Genera: 2

Foes:

Families: 2 | Genera: 2

Associates:

Families: 1 | Genera: 1

Geographic Distribution

Keys

• PellizGe2010: pp.52 ( Adult (F) ) [Key to the 7 eriococcid species known to occur on Leptospermum spp.]
• Afifi1968: pp.203 ( Adult (M) ) [Eriococcus species]
• Hoy1962: pp.31 ( Adult (F) ) [New Zealand species of Eriococcidae]

Remarks

• Systematics: Slide-mounted adult female with: enlarged setae cylindrical, sides straight, apices truncate, setae restricted to posterior abdominal segments, other dorsal setae hair-like; posterior 2 or 3 abdominal segments nodulose (Hoy, 1962).
• Structure: Adult females occur in the bark crevices and stem axils, accompanied by much "sooty mould." Sac is greyish white and closely felted (Hoy, 1954). Adult female is reddish to light brown, oval, approximately 1.25mm long and 1mm wide tapering to the rear.
• Biology: Each female lays about 50 eggs over a period of several weeks. The eggs hatch within half and hour of being laid and the minute nymphs wander over the plant until they find a suitable place to insert their mouth-parts (Zondag, 1977a). "On plants of Leptospermum scoparium Forst., Eriococcus orariensis Hoy has from two and a partial third to three and a partial fourth generations per year at Palmerston North. The length of the life cycle is influenced by climate, ranging from a mean of 14 weeks at a weekly mean temperature of 63.7F to a mean of 27 weeks at a weekly mean temperature of 50.9F. Under the same environmental conditions there are marked differences in the length of individual life cycles. This factor is responsible for overlapping generations in the field. On plants of L. scoparium infested for 12 months the population composition of E. orariensis tends towards stability with approximately 50 percent first stage nymphs and 18 percent adult females...No evidence of parthenogensis was observed (Hoy, 1961)."
• Economic Importance: This species has been devastating to stands of Leptospermum in New Zealand. An entomogenous fungus, Myrangium thwaitessi is associated with this species (Hoy, 1961).
• General Remarks: Detailed description and illustration of both sexes of adults and the first instar by Hoy (1954). Additional description and illustration by Hoy (1962). Hodgson (2002) used this species in a phylogenetic analysis of non-margarodid Coccoidea.

Illustrations

Citations