, Volume 68, Issue 4, pp 632–634 | Cite as

Sexual dichronism and intersexual phoresy in gall-forming coccoids

  • Penny J. Gullan
  • Andrew Cockburn
Short Communications


Coccoid gall-formers from the genus Cystococcus exhibit sexual dichronism, producing the males of a brood well before their sisters. This ensures the coexistence in the maternal gall of winged adult males and their first instar wingless sisters. Females disperse by clinging to the attenuate abdomens of their brothers, and the efficiency of this dispersal is reflected in an even dispersion on host trees. Evolution of this form of phoresy may be associated with the paternal genome loss prevalent in the Coccoidea.


Gall Adult Male Host Tree Paternal Genome Genome Loss 
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  1. Alstad DN, Edmunds GF (1983) Selection, outbreeding depression and the sex ratio of scale insects. Science 220:93–95Google Scholar
  2. Breeden S, Breeden K (1972) Australia's South East. William Collins, MelbourneGoogle Scholar
  3. Brimblecombe AR (1959) Studies of the Coccoidea in Queensland with particular reference to the Diaspididae. Ph D thesis, University of QueenslandGoogle Scholar
  4. Brown SW (1964) Automatic frequency response in the evolution of male haploidy and other coccoid chromosome systems. Genetics 49:797–817Google Scholar
  5. Brown SW (1967) Chromosome systems of the Eriococcidae (Coccoidea: Homoptera). I. A survey of several genera. Chromosoma 22:126–150Google Scholar
  6. Brown SW, Bennett FD (1957) On sex determination in the diaspine scale Pseudaulacapsis pentagona (Targ.) (Coccoidea). Genetics 42:510–523Google Scholar
  7. Brown SW, Chandra HS (1977) Chromosome imprinting and the differential regulation of homologous chromosomes. In: Goldstein L, Prescott DM (eds) Cell Biology. Academic Press, New York pp 109–189Google Scholar
  8. Bull JJ (1979) An advantage for the evolution of male haploidy and systems with similar genetic transmission. Heredity 43:361–381Google Scholar
  9. Bull JJ (1983) Evolution of Sex Determining Mechanisms Benjamin/Cummings, Menlo Park, CaliforniaGoogle Scholar
  10. Charnov EL (1982) The Theory of Sex Allocation. Princeton University Press, PrincetonGoogle Scholar
  11. Froggatt WW (1893) Notes on the family Brachyscelidae, with some accounts of their parasites, and descriptions of new species. Proc Linn Soc NSW 7:353–372Google Scholar
  12. Froggatt WW (1898) The growth of vegetable galls. Agric Gaz NSW 9:488–499Google Scholar
  13. Froggatt WW (1921) A descriptive catalogue of the scale insects (‘Coccidae’) of Australia. Part III. Dep Agric NSW Sci Bull 19:1–43Google Scholar
  14. Froggatt WW (1933) The Coccidae of the casuarinas. Proc Linn Soc NSW 58:363–374Google Scholar
  15. Fuller C (1897) Some Coccidae of Western Australia. J West Aust Bur Agric 4:1344–1346Google Scholar
  16. Fuller C (1899) Notes and descriptions of some species of Western Australian Coccidae. Trans ent Soc Lond 1899:435–475Google Scholar
  17. Gullan PJ (1984) A revision of gall-forming coccoid genus Apiomorpha Rübsaamen (Homoptera: Eriococcidae: Apiomorphinae). Aust J Zool Suppl 97:1–203Google Scholar
  18. Hill MJ (1980) Wind dispersal of the coccid Icerya seychellarum (Margarodidae: Homoptera) on Aldabra Atoll. J Anim Ecol 49:939–957Google Scholar
  19. Miller DR, Kosztarab M (1979) Recent advances in the study of scale insects. Ann Rev Entomol 24:1–27Google Scholar
  20. Nur U (1980) Evolution of unusual chromosome systems in scale insects (Coccoidea: Homoptera). In: Blackman RL, Hewitt GM, Ashburner M (eds) Insect Cytogenetics. Blackwell Sci Publs, Oxford, pp 97–118Google Scholar
  21. Schrader HL (1863) Further communication on the gall-making Coccidae. Trans ent Soc NSW 1:6–8Google Scholar
  22. Shields WM (1982) Philopatry, Inbreeding and the Evolution of Sex. State University of New York Press, New YorkGoogle Scholar
  23. Trivers RL (1985) Social Evolution. Benjamin-Cummings Menlo Park, CaliforniaGoogle Scholar

Copyright information

© Springer-Verlag 1986

Authors and Affiliations

  • Penny J. Gullan
    • 1
  • Andrew Cockburn
    • 1
  1. 1.Department of ZoologyAustralian National UniversityCanberra CityAustralia

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