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Issue: Vol. 3532 No. 1: 31 Oct. 2012
Type: Articles
Published: 2012-10-31
DOI: 10.11646/zootaxa.3532.1.1
Page range: 1–36
Abstract views: 32
PDF downloaded: 1

Nematodes from galls on Myrtaceae. III. Fergusobia from flower bud and stigma galls on Eucalyptus, with descriptions of four new species

Australian Centre for Evolutionary Biology and Biodiversity, and School of Agriculture, Food and Wine, The University of Adelaide, 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
Present address: North Carolina Department of Agriculture & Consumer Services, 1040 Mail Service Center, Raleigh, NC 27699-1040, 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 Myrtaceae galls Neotylenchidae Fergusonina nematodes flies morphology taxonomy DNA sequencing molecular phylogeny

Abstract

Four new species of Fergusobia from flower bud galls and a stigma gall on Eucalyptus spp. in Australia are described. Fer-gusobia eugenioidae Davies n. sp. is characterised by having an arcuate, open C or C-shaped parthenogenetic female witha conoid tail, an arcuate to open C-shaped infective female with a hooked tail region and a broadly rounded tail tip, andarcuate or open C-shaped males with angular spicules and short bursa. Fergusobia fasciculosae Davies n. sp. is character-ised by the combination of an arcuate parthenogenetic female with a short, broadly conoid tail, an open C-shaped infectivefemale with a hemispherical tail tip, and J-shaped males with angular spicules and short peloderan bursa. This is the firstFergusobia/Fergusonina association to be described from flower stigma galls. Fergusobia juliae Davies n. sp. is character-ised by the combination of an arcuate to C-shaped parthenogenetic female with a short, broadly conoid tail, a J-shaped in-fective female with a hooked tail region, a cuticular plate around the vulva, and a broadly rounded tail tip, and J-shapedmales with angular spicules and short peloderan bursa. Fergusobia morrisae Davies n. sp. has a C-shaped parthenogeneticfemale with a narrowly conoid tail, an arcuate or J-shaped infective female with most curvature behind the vulva and a shorttail with an almost hemispherical tip, and arcuate or J-shaped males with strongly sclerotised, angular spicules and a longpeloderan bursa. Other known similar forms of Fergusobia/Fergusonina flower bud galls from Eucalyptus spp. are outlinedand the larval shield morphology of their associated mutualistic fly species is discussed where known. An inventory of allknown Fergusobia/Fergusonina associations from flower bud galls from Eucalyptus spp. is presented. Molecular analysisof Fergusobia nematodes was inferred from DNA sequencing of 28S rDNA D2/D3 domains and a portion of mitochondrial DNA cytochrome oxidase subunit I (mtCOI). Possible evolutionary relationships are discussed.

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