Syzygium

Davies, Kerrie A., Ye, Weimin, Giblin-Davis, Robin M., Taylor, Gary S., Scheffer, Sonja & Thomas, W. Kelley, 2010, The nematode genus Fergusobia (Nematoda: Neotylenchidae): molecular phylogeny, descriptions of clades and associated galls, host plants and Fergusonina fly larvae 2633, Zootaxa 2633 (1), pp. 1-66 : 41

publication ID	https://doi.org/ 10.11646/zootaxa.2633.1.1
persistent identifier	https://treatment.plazi.org/id/FB74996E-9E0A-FFAD-ACA8-FE03FC0FD2D1
treatment provided by	Felipe
scientific name	Syzygium
status

Treatment

Genus Syzygium View in CoL

S. luehmannii F. Muell.

Fergusobia voucher specimens nos 470, 735; associated with an undescribed species of Fergusonina ( Figs 11 View FIGURES 1–22 , 33 View FIGURES 23–43 , 53 View FIGURES 44–61 ).

Clade 10 in Fig. 78.

Form of gall. Usually one, but up to five locules, in pea-like galls developing on leaf blade, leaf mid-rib, leaf and flower buds, or stems ( Fig. 80 View FIGURES 80–88 ). Similar to those described from E. gomphocephala . The multilocular form on stems has a warty appearance and appears to develop in a leaf axis (leaf usually dehisced).

Morphology of nematodes. Parthenogenetic female small; arcuate to open C-shape; medium oesophageal glands; short conoid tail. Infective female small; arcuate in shape; similar shape to parthenogenetic female but slimmer; small oesophageal glands; conoid tail. Male small; almost straight; oesophageal gland large; spicule arcuate, anterior part distinctly longer than posterior; tail conoid, tip bluntly rounded; bursa arises at ca 50% of body length.

Morphology of dorsal shield. (WINC 063818). Shield comprising 2 or 3 transverse ‘bars’ and many spicules; similar to those from Mel. cajuputi ( Taylor 2004) . ‘Bars’ comprise narrow patches of small spots of black chitin, running across body width.

Possible relationships. Clade 10 comprised Fergusobia from S. luehmannii and Met. excelsa . This clade, inferred from analyses of sequences of D2/D3, was weakly supported in this work (Fig. 78), but received 100% support in the analysis in Ye et al. (2007b). Analyses of sequences from COI gave no support for the grouping (Fig. 79). The nematodes from S. luehmannii were morphologically similar to F. nervosae from M. nervosa (K.A. Davies, unpub. data). However, F. pohutukawa Davies 2007 was morphologically closest to F. jambophila Siddiqi 1986 from flower bud galls on S. cumini in India ( Taylor et al. 2007). Given the additional differences in gall and shield form and disparate host plant distributions ( Australia and New Zealand), this seemed an unlikely grouping of Fergusobia .

Metrosideroseae