Goniagnathus osmelaki Fletcher, sp.nov.
Creators: name: Fletcher, Murray J.
name: Zahniser, James N.
Publisher: name: Zenodo
Year: 2008
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Cicadellidae
Goniagnathus
Goniagnathus osmelaki

description: Goniagnathus osmelaki Fletcher sp.nov.
(Figures 1, 7, 13–18)
Holotype: male, Tatura, Victoria. 30.xi.1982, J.A. Osmelak (ASCU: ASCTHE0006093)
Paratypes: New South Wales: 1 male, same data as holotype (ASCU); 1 male, Cowra, 3.xii.1987, J.A. Osmelak, ex tomatoes (ASCU); 1 male, Gol Gol, 6.iii.1998, M. Ward, vineyard weeds (VAIC); Queensland: 1 male, Lake Broadwater, nr Dalby, Qld. site 8. 27 º21’S 151º06’E 21.iii.1987, G. & A. Daniels (UQIC); Victoria: 1 female, Wemen, 27.xi.1997, M. Ward, vineyard weeds (VAIC); South Australia: 1 male, Keith, SA, 26.x.2004, SGSL project, pit trap (ASCU).
Colour: Dark brown dorsally with pale brown speckling, ventrally dark brown. Length: males (N=8) 4.5 mm (range 4.37–4.60 mm), female (N=1) 4.50 mm.
Morphology: Anteclypeus apically sinuate, slightly exceeding facial margin. Frontoclypeus broad with distinct transverse ridging. Frontoclypeal sutures extending onto vertex, terminating outside ocelli which are obsolescent, separated from eye by more than 2 ocellar diameters. Vertex broadly convex anteriorly, shallowly concave posteriorly. Pronotum short, transversely wrinkled, short laterally with indistinct longitudinal carina behind eye. Tegmina with apical cells short, appendix well developed but narrow. Outer preapical cell quadrate, not stalked. Inner preapical cell closed basally by crossvein. Claval cells united at about midlength of clavus by crossvein.
Male genitalia: Pygofer (Figure 13) short with oblique ridge bearing two macrosetae dorsally, irregular line of finer setae along margin, terminating with posteroventral prominence with three short stubby macrosetae. Posterior lobe beyond ridge apically rounded or quadrate, sometimes incurved. Subgenital plates (Figure 14) short, forming triangular prominence beyond sternite. Parameres (Figure 15) with apical section finely rugose, broadly concave apically with outer lobe longer than inner lobe; basal section transverse oblong. Aedeagus (Figures 16, 17) finely attenuated, tapering base to apex, evenly curved in lateral view, with preapical gonopore, preapical recurved tooth and fine acute apex. In posterior view (Figure 17), aedeagus tapered base to apex which is bifurcate beyond gonopore.
Female: Pregenital sternite with hind margin (Figure 18) broadly and shallowly emarginate with median shallow notch.
Etymology: The species is named in honour of John Osmelak, formerly of the Victorian Dept of Agriculture, who collected part of the type series of this species and the first male specimen of G. centralis, during his work on tomato big bud phytoplasma.
Notes: The “SGSL project” is an Australia –wide program entitled Sustainable Grazing in Saline Landscapes monitoring the diversity and productivity of various pasture regimes in reclaiming areas affected by increased salinity. It is funded by Meat and Livestock Australia and part of the monitoring has involved pitfall trapping for invertebrates.
description: Published as part of Fletcher, Murray J. & Zahniser, James N., 2008, The first record of Goniagnathini from Australia with description of four new species of Goniagnathus Fieber (Hemiptera: Cicadellidae: Deltocephalinae), pp. 43-54 in Zootaxa 1692 on pages 45-48, DOI: 10.5281/zenodo.180619