Chetoneura cavernae Colless, 1962

Ševčík, Jan, 2012, Pseudochetoneura gen. nov., a peculiar new genus from Ecuador, with notes on Chetoneura (Diptera: Keroplatidae), Acta Entomologica Musei Nationalis Pragae 52 (1), pp. 281-288 : 284-286

Chetoneura cavernae Colless, 1962

( Fig. 6 )

Chetoneura cavernae Colless, 1962: 439 .

Material examined. THAILAND: PETCHABURI: Kaeng Krachan NP, Pa La-U/Waterfall/Ficus tree, 12°32.154′N 99°28.098′E, 11.–18.xii.2008, Malaise trap, Thongbai leg., T4548 ( QSBG). MALAYSIA: PAHANG: Cameron Highlands, Tanah Rata, Robinson Falls env., 26.–29.i.2009, 1 J, Malaise trap, J. Ševčík leg. ( JSOC). SABAH: Tawau, Maliau Basin, Nepenthes Camp, 994 m a.s.l., 9.–14.vii.2007, 1 J, Mega Malaise trap, B. Viklund & N. Jönsson leg. ( NHRM). BRUNEI: Ulu Temburong, 16.–22.ii.1982, 1 J, 14.ii.–9.iii.1982, 1 J, Malaise trap, M. C. Day leg. ( BMNH).

. nov. 1–2 –); 3 – wing (holotype). 4–5 – details of male, holotype (4 – terminalia in ventral view; 5 – tergite 9 and cerci in dorsal view). Scale bar 0.05 mm.

Differential diagnosis. This is the type species of the genus and differs from the other two species of Chetoneura in having R-M fusion short, C produced beyond R 5 to about two thirds of the distance between the tips of R 5 and M 1, mediotergite setose and medially dark, and details on the male terminalia (tergite 9 longitudinal, about 4/3 as long as broad, gonocoxites medioventrally with relatively short setae).

Variation. The relative length of antennae in male seems to vary with the size of specimen. One smaller male from Brunei (wing length 2.8 mm) has relatively long antennae, almost as long as the wing, in comparison with the larger specimen from Cameron Highlands ( Fig. 6 ; wing length 4.1 mm).

Figures

Fig. 6–7. Chetoneura species. 6 – Chetoneura cavernae Colless, 1962, male habitus (Cameron Highlands, Malaysia); 7 – Chetoneura oligoradiata (Papp, 2006), wing venation (holotype, Thailand).