Antargidium allucente Benson

Schmidt, Stefan, 2012, Revision of the Australian sawfly genus Antargidium (Hymenoptera, Symphyta, Argidae) with description of two new species, Zootaxa 3180, pp. 47-56 : 49-52

Antargidium allucente Benson

( Figs 1, 6 , 8 , 14, 15)

Antargidium allucente Benson, 1934: 230 –231.

Antargidium allucente: Quinlan 1974: 227 (type information), Taeger et al. 2010: 121 (catalogue).

Description. Female. Length 5–6 mm. Antenna dark brown to black. Head orange, lower face yellow-white, ocellar triangle and area above antennal sockets sometimes with brown spot; apex of mandible reddish-brown. Thorax black with pronotum and tegula yellow. Legs black except forefemur at apex, tibiae and tarsi yellow-brown. Abdomen yellow-brown, first tergite at base and apex of abdomen starting with tergite 5 or 6 black. Wings hyaline with apical half slightly infuscate; veins and stigma black.

Supraclypeal area glabrous with very scattered punctation, without median longitudinal carina. Antenna shorter than width of head (0.8); pedicel transverse, 0.4 × as long as broad. POL slightly shorter than OOL (0.8); postocellar area about 1.5 × as broad as long. Eyes about 1.4 × as long as broad, converging below, interocular distance 1.2 × eye height. Sawsheath short, apically with scopae projecting posteriorly and inwards, in lateral view rounded ( Benson 1934, figs 4a, b). Lancet short and triangular, with 10 serrulae, basal 3 serrulae rounded, apical 7 serrulae serrate, with distinct, sclerotized, rounded projections of annuli above serrulae 5–9.

Male. Length 6.5 mm. Similar to female except the following parts sometimes orange-yellow: mesepisternum, mesepimeron, mesosternum, hypopygium, genitalia, and legs except outer middle and hind tibiae brownish.

FIGURES 14–23. Antargidium spp., 14, 16, 18, 20, 22: female lancet, 15, 17, 19, 21, 23: middle section of lamnium. (14, 15) A. allucente ; (16, 17) A. apicale ; (18, 19) A. atriceps holotype; (20, 21) A. dentivalve holotype; (22, 23) A. nigrum .

Host. Alectryon oleifolius (Desf.) S.T.Reynolds (Sapindaceae) .

Distribution. Australia: New South Wales, Queensland.

Types. Holotype: Female, labelled “ Type ” [round label with red margin], “Meteor Downs nr. Springsure Q, 18 Nov. – 3 Dec. 1930. I. M. Mackerras”, “ HOLOTYPE Antargidium allucente sp. nov., det. R. B. Benson 1934 ”, “ Holotype ” [red label], (ANIC, examined). Paratype: Female, labelled “ Paratype ” [round label with yellow margin], “Meteor Downs nr. Springsure, Q. 8 Nov. – 3 Dec. 1930. I. M. Mackerras”, “ PARATYPE Antargidium allucente sp. nov. det R.B. Benson 1934 ” (BMNH).

Additional specimens examined. NEW SOUTH WALES. Mullaley (-31.10°, 149.91°), Jan 1957, F. E. Wilson (1 3, 1 Ƥ, MVMA); Bogan road (-32.9°, 148.1°), taken on Geijera parviflora flowers, Oct 1955, J. Armstrong (1 3, MVMA); 70 km W Cobar (-31.66°, 146.81°), 24 Nov 1949, E. F. Riek (1 Ƥ, ANIC); Murrumbogie (-33.02°, 147.42°), 16 Oct 1900, W. W. Froggatt (1 3, ANIC); Moree (-29.46°, 149.84°), 5 Dec 1917, W. W. Froggatt ( ANIC); 1 Ƥ Trangie (-32.03°, 147.98°), 5 Dec 1958, K. L. Taylor (1 3, 1 Ƥ, ANIC); near Bourke, 26 Oct 1949, S. J. Paramonov (1 3, USNM). QUEENSLAND. 16 km N Boonah (-27.90°, 152,68°), 6.i.1987 and 11 Apr 1998, C. J. Burwell (1 3, QMB; 1 Ƥ, ZSM); Lawes (-27.57°, 152.33°), 11 Feb 1945, W. Lovett (1 Ƥ, ANIC); Amby (- 26.55°, 148.19°), H. E. & M. A. Evans & A. Hook (1 3, QMB); Mackay (-21.14°, 149.19°), R. E. Turner (1 Ƥ, BMNH).

Remarks. The species can be distinguished by the slightly infuscate distal half of the forewing, the smooth and shining supraclypeal area that lacks a median longitudinal carina, and the deeply excised hypopygium.

Figures

FIGURES 1 – 7. Antargidium spp., 1 – 2 face, 3 – 4: vertex, 5: apex of abdomen, 6: female hypopygium, 6: sawsheath. (1, 6) A. allucente; (2) A. atriceps; (3, 7) A. flavescens holotype; (4, 5) A. dentivalve. Abbreviations: S: supraclypeal area, K: carina, P: dorsal projections.

FIGURES 8 – 13. Antargidium spp., 8 – 2: females in lateral view, 13: apex of abdomen and sawsheath in lateral view. (8) A. allucente; (9) A. atriceps; (10) A. dentivalve; (11) A. flavescens holotype; (12) A. nigrum holotype; (13) A. apicale.