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Type: Articles
Published: 2010-10-04
Page range: 25–40
Abstract views: 39
PDF downloaded: 3

Nematodes from galls on Myrtaceae. I. Fergusobia/Fergusonina galls on Corymbia spp., with re-description of F. magna and notes on its phylogenetic relationships

Australian Centre for Evolutionary Biology and Biodiversity, and School of Agriculture, Food and Wine, The University of Adelaide, Waite Campus, PMB 1, Glen Osmond, South Australia 5064, Australia
Fort Lauderdale Research and Education Center, University of Florida, 3205 College Ave, Davie, Florida 33314–7799, USA
Fort Lauderdale Research and Education Center, University of Florida, 3205 College Ave, Davie, Florida 33314–7799, USA Present address: Nematode Assay Section, Agronomic Division, North Carolina Department of Agriculture & Consumer Services, 4300 Reedy Creek Road, Raleigh, NC 27607, USA
Australian Centre for Evolutionary Biology and Biodiversity, and School of Earth and Environmental Sciences, The University of Adelaide, North Terrace, Adelaide, South Australia 5005, Australia
Hubbard Center for Genome Studies, University of New Hampshire, 35 Colovos Rd., Durham, NH, 03824, USA
Nematoda 18S rDNA 28S rDNA D2/D3 COI DNA sequencing Australia Neotylenchidae galls Myrtaceae Fergusoninidae flies molecular phylogeny morphology taxonomy coevolution cospeciation

Abstract

Fergusobia magna (Neotylenchidae: Fergusobiinae), collected from axial bud (‘stem’) galls on Corymbia tessellaris growing in coastal regions of Queensland, Australia, is re-described. It is characterised by having a combination of a relatively large, variably shaped parthenogenetic female with a slender conoid tail; a relatively large arcuate infective female with a long slender tail with a pointed tip and a relatively anterior vulva; and relatively large, arcuate, open C or Jshaped males with angular spicules having manubrium and shaft forming 66% of their length, slender tail and peloderan bursa arising at 30–50% body length. Other known forms of Fergusobia/Fergusonina galls from Corymbia are outlined, and the morphology of nematodes from them and the shield morphology of their associated mutualistic fly species from Corymbia spp. are described where known. The possible phylogenetic relationships of these associations from Corymbia are discussed.

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