title: Nematodes from galls on Myrtaceae. VI. Fergusobia from galls on Angophora in Australia, with description of F. colbrani n. sp. and key.
abstract: Collection data and biological information is presented on the Fergusobia (Nematoda: Neotylenchidae)/ Fergusonina (Diptera: Fergusoninidae) mutualism inducing galls on Angophora in Australia. Three species and two morphospecies have been recognised. Fergusobia colbrani Davies n. sp. is described from soft spheroid leaf galls on Angophora floribunda. It is characterised by a combination of morphological characters including a small C-shaped parthenogenetic female with a short broadly conoid tail, an arcuate infective female with an almost hemispherical tail tip, and an arcuate to barely J-shaped male with an angular spicule having a notched tip and mid-length leptoderan bursa. A key to the species and morphospecies of nematodes collected from Angophora is presented. Possible relationships of these organisms are discussed based on evidence from the nematode morphology, gall forms, and the morphology of the dorsal shield of the associated Fergusonina fly larvae.
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: 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, Clunies Ross Street, Acton, Australian Capital Territory 2601, Australia.; Email: nelson.leigh@gmail.com.
authors.forename: Leigh A
authors.initials: LA
authors.lastname: Nelson
authors.affiliation: CSIRO Ecosystem Sciences, Clunies Ross Street, Acton, Australian Capital Territory 2601, Australia.; Email: David.Yeates@csiro.au.
authors.forename: David
authors.initials: D
authors.lastname: Yeates
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
mesh_terms: D063147:Animal Distribution; D000825:Animal Structures / Q000033:anatomy & histology / Q000254:growth & development; D000818:Animals; D001315:Australia; D049628:Body Size; D005260:Female; D008297:Male; D027822:Myrtaceae / Q000469:parasitology*; D009929:Organ Size; D010941:Plant Tumors / Q000469:parasitology*; D017187:Tylenchida / Q000033:anatomy & histology / Q000145:classification* / Q000254:growth & development / Q000302:isolation & purification