Anagonia uptoni, Colless, 2012

Colless, Donald H., 2012, The Froggattimyia-Anagonia Genus Group (Diptera: Tachinidae), Records of the Australian Museum 64 (3), pp. 167-211 : 206-208

Anagonia crosskeyi sp. nov.

Figs 72–74

Types. Holotype male in ANIC, no. 29-029225, 16 mi W of Ouyen, Vic., 15 Mar. 1966, MSU and J. A. Grant, terminalia in tube 190. Paratypes—Victoria: 1 male, same data as holotype, T.t. 102.— Western Australia: 1 male, 1 mi WNW of Balladonia Motel, 3 Nov. 1969, Key & MSU, T.t. 384.

Generally similar to A. rufifacies (pale form), but all hairs and bristles dark (except as usual on occiput); differing also as follows:

Male. Head. Width very variable, 3.8 mm in 1 specimen, 2.5 mm in 2 others. Frons rather wide, Frw/Hdw 0.2–0.3; gena also rather wide, Gnw/Eyh 0.3–0.4. Ivb/Vb-E normal for size, 1.1–1.2 (means omitted, as 3 specimens very different in size). Eye practically bare. Fronto-orbits dark in ground colour, parafacial somewhat variable. Ocellar setae not differentiated; postocellar setae 2–4.

Thorax. Median vitta poorly differentiated. Presutural intraalar bristles well developed. Intrapostalar well differentiated. Scutellum brown with variable degree of darkening at base; apical setae very variable, from fine to unusually stout. Calypter pale except along extreme medial margin.

Legs. Tibiae concolorous with femora. Foretibia with preapical ad spine about 0.5 times as long as adjacent d

spine, which is rather smaller than usual. Hindtibia with pd1 long, Pd1/Sdd 1.1–1.4; ad comb variable, from profuse to quite sparse.

Abdomen. Submedian marginal bristles lacking on syntergite 1+2, barely or not at all differentiated on tergite 3.

Terminalia ( Figs 72–74 ). Appendages noticeably small

compared with syntergosternite 6–8. Surstylus paddle- shaped, bluntly tapering, with short, wiry bristles. Cercus with greatly expanded basal section with normal hairs and profuse microtrichiae, tapering to a shorter apical section, which is curved, sharp-pointed and claw-like, with conspicuous apicointernal teeth over much of its length. Epiphallus well developed with rounded apex.

Female. Unknown.

Distribution. Seen only from Victoria and Western Australia.

Biology. All specimens were taken at light.

Notes. Despite the few specimens seen, the extraordinary terminalia guarantee specific status. One specimen from Western Australia is 1.5 times as large as the other two from Victoria, but, again, the terminalia leave no doubt that they are conspecific.

The name commemorates my friend and colleague, Dr Roger Crosskey, whose magisterial pioneering studies made this study possible.

Figures

Figs 72–74. Anagonia crosskeyi sp. nov., male terminalia. (72) Lateral, and (73) posterior views, (74) aedeagus.