Enithares cf. vicintricata Lansbury, 1968

Zettel, Herbert, Lane, David J. W., Pangantihon, Clister V., Freitag, Hendrik & Be, Jalan Tungku Link, 2012, Notes on Notonectidae (Hemiptera: Heteroptera) from southeastern Asia, mostly from Brunei and the Philippines, Acta Entomologica Musei Nationalis Pragae 52 (1), pp. 29-48 : 43

Enithares cf. vicintricata Lansbury, 1968

Enithares vicintricata Lansbury, 1968: 430 .

Material examined. BRUNEI: BELAIT DISTRICT: Labi, Rampayar, Sungai Menderam, 4°20′30.7″N 114°26′55.2″E, 19.v.1996, leg. H. H. Tan, Y. Y. Goh, H. H. Ng & D. Yeo (THH9634, ZRC 6.18843), 1 J 1 ♀ ( ZRCS). Peat-swampy area draining to Sungai Ingei, 6.vi.2010, leg. D. J. W. Lane (15), 6 JJ 4 ♀♀ ( UBDB). Sungai Ingei, forest pool, 4°08.921′N 114°43.364′E, 8.vi.2010, leg. D. J. W. Lane (#22), 1 J 1 ♀ ( NHMW, UBDB).

Notes. Enithares vicintricata was described from two males and one female from Sarawak by LANSBURY (1968) and is regarded as an endemic species of Borneo ( CHEN et al. 2005). Similar, closely related species live on Java and Sumatra ( E. intricata Breddin, 1905 ) and on the Andaman Islands ( E. rogersi Distant, 1910 ) (see LANSBURY 1968). The specimens from Brunei differ slightly from the types of E. vicintricata , e.g., by smaller size (7.3–7.9 mm vs. 9.0 mm in the types); male with three stout setae on the first mesotarsomere (vs. two in the types of E. vicintricata and four in E. intricata ; fide LANSBURY 1968) and basal plate of the phallus bluntly produced posteroapically (more acutely produced in all other forms). Specimens similar to those of the Brunei population are known from several locations in Sarawak (specimens in NHMW, unpublished), but it seems that there is more than one species of the E. vicintricata complex in western Borneo. A careful analysis on the population structure of ‘ E. vicintricata ’ will be required before drawing further taxonomic conclusions. For that reason, the identification of the Brunei material should be regarded as preliminary.