From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Eriococcus coriaceus from CSIRO.jpg
Eriococcus coriaceus
the gumtree scale.
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Hemiptera
Suborder: Sternorrhyncha
Superfamily: Coccoidea
Family: Eriococcidae

See text

Eriococcidae is a family of scale insects in the order Hemiptera. They are commonly known as felt scales or eriococcids. Each species is usually specific to a different plant host, or closely related group of hosts.

Recent research using ribosomal DNA has shown that the family Eriococcidae is not a single monophyletic group but is an aggregation of several different groups.[1] Some species that appear morphologically similar seem to be only distantly related while dissimilar species are sometimes more closely related.[2] The type genus Eriococcus has been shown to be polyphyletic.[2]


Felt scales are a diverse group of scale insects. They produce a white, yellowish or gray membranous capsule or ovisac that encloses the pyramid-shaped body of the adult female. The body itself varies in colour and may be pink, red or purple, green or brown. The posterior end of the sac has a small opening that allows newly hatched nymphs to emerge. Some species occur under the bark of the host plant and produce little or no ovisac secretion. The bodies of these are often pink or red. Many species produce galls, including Apiomorpha which feeds on various species of eucalypt and has a complex life cycle. It can produce separate male galls that are induced on existing female galls.[3]

Some species are tree pests in North America, including: European elm scale, azalea bark scale, oak eriococcin, crape myrtle bark scale, beech scale [4]


See also[edit]


  1. ^ Cook, L.G., Gullan, P.J. & Trueman, H.E. 2002. A preliminary phylogeny of the scale insects (Hemiptera: Sternorrhyncha: Coccoidea) based on nuclear small-subunit ribosomal DNA. Molecular Phylogenetics and Evolution 25(1): 43-52. doi: 10.1016/S1055-7903(02)00248-8
  2. ^ a b Cook, L.G. & Gullan, P.J. 2004: The gall-inducing habit has evolved multiple times among the eriococcid scale insects (Sternorrhyncha: Coccoidea: Eriococcidae). Biological Journal of the Linnean Society, 83: 441-452. DOI: 10.1111/j 1095-8312.2004.00396.x
  3. ^ APHIS: Family: Eriococcidae Archived 2010-10-11 at the Wayback Machine.
  4. ^ Borror and DeLong's Introduction to the Study of Insects�Norman F. Johnson, Charles A. Triplehorn. 2004. Brooks Cole.
  • Hoy, J.M. 1963: A catalogue of the Eriococcidae (Homoptera: Coccoidea) of the world. New Zealand Department of Scientific and Industrial Research bulletin, 150: 1-260.
  • Miller, D.; Ben-Dov, Y. 2005: ScaleNet [1]