title: Nematodes from galls on Myrtaceae. IX. Fergusobia rosettae n. sp. on Melaleuca quinquenervia and F. tolgaensis n. sp. on Syzygium luehmannii, from Queensland.
abstract: Two new species of Fergusobia, collected from 'rosette' shoot bud galls on Melaleuca quinquenervia, and from leaf, stem, leaf and flower bud galls on Syzygium luehmannii, both from the Cairns region of Queensland, Australia, are described. Fergusobia rosettae Davies n. sp. is characterised by the combination of a small, arcuate parthenogenetic female having a short conoid tail with a bluntly rounded tip, an arcuate, relatively slender, infective female with an almost hemispherical tail tip, and arcuate males with arcuate to angular (not heavily sclerotised) spicules and leptoderan bursa arising at 40-50% of body length from tail tip. Fergusobia tolgaensis Davies n. sp. is characterised by the combination of a small open C-shaped parthenogenetic female with a broadly conoid tail, an arcuate infective female with a broadly rounded tail tip, and arcuate males with angular (not heavily sclerotised) spicules and short to mid-length leptoderan bursa. These two species of nematodes are associated with fly larvae that have dorsal shields comprising bars of raised cuticular ridges and spicules, similar to that of fly larvae from the M. leucadendra species group. The shield morphologies of these fly larvae and their possible genetic relationships are discussed. Possible evolutionary relationships of the Fergusobia nematodes from these galls are discussed, considering their morphology, DNA sequences, and the relationships of the associated Fergusonina flies and host plants.
authors.affiliation: 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.; Email: kerrie.davies@adelaide.edu.au.
authors.forename: Kerrie A
authors.initials: KA
authors.lastname: Davies
authors.affiliation: Nematode Assay Section, Agronomic Division, North Carolina Department of Agriculture & Consumer Services, 4300 Reedy Creek Road, Raleigh, NC 27607, USA.; Email: weimin.ye@ncagr.gov.
authors.forename: Weimin
authors.initials: W
authors.lastname: Ye
authors.affiliation: Fort Lauderdale Research and Education Center, University of Florida, 3205 College Ave, Davie, Florida 33314-7799, USA.; Email: giblin@ufl.edu.
authors.forename: Robin M
authors.initials: RM
authors.lastname: Giblin-Davis
authors.affiliation: 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.; Email: gary.taylor@adelaide.edu.au.
authors.forename: Gary S
authors.initials: GS
authors.lastname: Taylor
authors.affiliation: CSIRO Ecosystem Sciences/USDA ARS Australian Biological Control Laboratory, GPO Box 2583, Brisbane, Queensland, 4001, Australia.; Email: matthew.purcell@csiro.au.
authors.forename: Matthew
authors.initials: M
authors.lastname: Purcell
authors.affiliation: Hubbard Center for Genome Studies, University of New Hampshire, 35 Colovos Rd., Durham, NH, 03824, USA.; Email: kelley.thomas@unh.edu.
authors.forename: Kelley
authors.initials: K
authors.lastname: Thomas
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D049628:Body Size; D005260:Female; D008297:Male; D031650:Melaleuca / Q000469:parasitology*; D009929:Organ Size; D010802:Phylogeny; D010941:Plant Tumors / Q000469:parasitology*; D011793:Queensland; D027842:Syzygium / Q000469:parasitology*; D017187:Tylenchida / Q000033:anatomy & histology / Q000145:classification* / Q000235:genetics / Q000254:growth & development