Open Access Open Access  Restricted Access Subscription or Fee Access


Two new species of Selitrichodes (Hymenoptera: Eulophidae: Tetrastichinae) inducing galls on Casuarina (Casuarinaceae)



Two new species of gall-inducing wasps, Selitrichodes casuarinae Fisher & La Salle sp. n. and Selitrichodes utilis Fisher & La Salle sp. n., are described from Micronesia (Guam, Rota and Palau Islands) and Australia respectively. These species induce galls on Casuarina and can cause extensive damage to the trees. Their status as pest or beneficial species is discussed.


gall induction, invasive species, Micronesia, Guam, Rota, Palau, sheoak

Full Text:

PDF/A (3.83 MB)


Bouček, Z. (1988) Australasian Chalcidoidea (Hymenoptera): A Biosystematic Revision of Genera of Fourteen Families,with a Reclassification of Species. CAB International, Wallingford, UK, 832 pp.

Gaskin, J.F., Wheeler, G.S., Purcell, M.F. & Taylor, G.S. (2009) Molecular evidence of hybridization in Florida’s sheoak (Casuarina spp.) invasion. Molecular Ecology, 18, 3216–3226.

Gibson, G.A.P. (1997) Chapter 2. Morphology and Terminology. In: Gibson, G.A.P., Huber, J.T. & Woolley, J.B. (Eds.), Annotated Keys to the Genera of Nearctic Chalcidoidea (Hymenoptera). National Research Council Research Press, Ottawa, pp. 16–44.

Girault, A.A. (1913[145]) Some new genera and species of chalcidoid Hymenoptera of the Family Eulophidae from Australia. Journal of Entomology and Zoology, 5, 103–112.

Girault, A.A. (1913[146]) A new gall-inhabiting eulophid genus from Queensland, Australia. Entomologist, 46, 177–178.

Girault, A.A. (1913[156]). New genera and species of chalcidoid Hymenoptera from North Queensland. Archiv fürNaturgeschichte, 79, Abt. A, H.6, 46–51.

Graham, M.W.R. de V. (1987) A reclassification of the European Tetrastichinae (Hymenoptera: Eulophidae), with a revision of certain genera. Bulletin of the British Museum (Natural History) Entomology series, 55, 1–392.

Kelly, J., La Salle, J., Harney, M., Dittrich-Schröder, G. & Hurley, B. (2012) Selitrichodes neseri n. sp., a new parasitoid of the eucalyptus gall wasp Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae: Tetrastichinae). Zootaxa, 3333, 50–57.

Kim, I.-K., Mendel, Z., Protasov, A., Blumberg, D. & La Salle, J. (2008) Taxonomy, biology and efficacy of two Australian parasitoids of the eucalyptus gall wasp, Leptocybe invasa Fisher & La Salle (Hymenoptera: Eulophidae: Tetrastichinae). Zootaxa, 1910, 1–20.

La Salle, J. (1994) North American genera of Tetrastichinae (Hymenoptera: Eulophidae). Journal of Natural History, 28, 109–236.

La Salle, J., Arakelian, G., Garrison, R.W. & Gates, M.W. (2009) A new species of invasive gall wasp (Hymenoptera: Eulophidae: Tetrastichinae) on blue gum (Eucalyptus globulus) in California. Zootaxa, 2121, 35–43.

Morton, J.F. (1980) The Australian pine or beefwood (Casuarina equisetifolia L.), an invasive "weed" tree in Florida. Proceedings, Florida State Horticultural Society, 93, 87–95.

Paine, T.D., Millar, J.C. & Daane, K.M. (2010) Accumulation of pest insects on Eucalyptus in California: random process or smoking gun. Journal of Economic Entomology, 103, 1943–1949.

Schauff, M.E., LaSalle, J. & Coote, L.D. (1997) Chapter 10. Eulophidae. In: Gibson, G.A.P., Huber, J.T. & Woolley, J.B. (Eds.), Annotated Keys to the Genera of Nearctic Chalcidoidea (Hymenoptera). National Research Council Research Press, Ottawa, pp. 327–429.

Schlub, R.L., Mersha, Z., Aime, C.M., Badilles, A., Cannon, P.G., Marx, P.G. , McConnell, J., Moore, A., Nandwani, D., Nelson,S.C., Pinyopusarerk, K., Schlub, K.A., Smith, J.A. & Spaine, P.O. (2011) Guam Ironwood (Casuarina equisetifolia) Tree Decline Conference and Follow-up. In: Zhong, C., Pinyopusarerk, K., Kalinganire, A. & Franche, C. (Eds.), Proceedings of the 4th International Casuarina Workshop, Haikou, China, 21–25 March 2010, pp. 239–246.

Schlub, R.L. (2013) Gago, Guam ironwood tree, Casuarina equisetifolia: Past, present, future. University of Guam Cooperative Extension Service Technical Report. Available from: (accessed 5 March 2014)

Wheeler, G.S. Taylor, G.S., Gaskin, J.F. & Purcell, M.F. (2011) Ecology and management of sheoak (Casuarina spp.), an invader of Coastal Florida, U.S.A.. Journal of Coastal Research, 27, 485–492.

Whistler, W.A. & Elevitch, C.R. (2006) Casuarina equisetifolia (beach she-oak), C. cunninghamiana (river she-oak). Species Profiles for Pacific Island Agroforestry. Available from: (accessed 5 March 2014)


  • There are currently no refbacks.

ISSN 1175-5326 (Print Edition) & ISSN 1175-5334 (Online Edition)
Published by Magnolia Press, Auckland, New Zealand
A founding journal of Biotaxa