Chalastonepsia orientalis Søli, 1996

Ševčík, Jan & Hippa, Heikki, 2010, New species of Chalastonepsia and Pectinepsia gen. nov. (Diptera: Mycetophilidae) from the Oriental and Australasian Regions, Acta Entomologica Musei Nationalis Pragae 50 (2), pp. 595-608 : 607-608

Chalastonepsia orientalis Søli, 1996

( Figs. 18, 19 )

Material examined. THAILAND: Nakhon Nayok, Khao Yai NP, behind Headmasters House , 14°24.781′N 101°22.689′E, 770 m, Malaise trap, 12.–19.vii.2006, 6 JJ, Pong Sandao leg., T147 ; THAILAND, Nakhon Nayok, Khao Yai NP, nature trail in secondary forest, 14°24.522′N 101°22.434′E, 750 m, Malaise trap, 19.–26.viii.2006, 6JJ, Pong Sandao leg., T405 ; THAILAND, Phetchabun, Nam Nao NP, hill evergreen forest, 16°44.371′N 101°34.549′E, 834 m, Malaise trap, 26.v.–2.vi.2007, 1J, Leng Janteab leg., T2429 ; THAILAND, Kamphaeng Phet, Mae Wong NP Chong Yen , 16°5.968′N 99°6.472′E, 1306 m, Malaise trap, 1.–8.x.2007, 10JJ 1♀, Chumpol Piluk & Aram Inpuang leg., T2816 ; THAILAND, Chanthaburi, Khao Khitchakut NP, 100 m N/ Prabaht Unit , 12°48.842′N 102°9.144′E, 203 m, Malaise trap, 7.–14.vii.2008, 20 JJ 1 ♀, Suthida & Charoenchai leg., T2973 ; THAILAND, Chiang Mai, Doi Chiang Dao NP, Nature trail, 19°24.278′N 98°55.311′E, 491 m, Malaise trap, 7.–14.x.2007, 1 J, Songkran & Apichart leg., T3175 (all QSBG) . MALAYSIA: SARAWAK: Gunung Mulu National Park, limestone forest in Melinau Gorge , 5.–22.ii.1978, 2JJ, Malaise trap, N. M. Collins leg. ( BMNH) . BRUNEI: Ulu Temburong, 16.–22.ii.1982, 1 J, Malaise trap, M. C. Day leg. ( BMNH) . INDONESIA: SUMATRA: Aceh, Gunung Leuser National Park, Ketambe res. st., 3°41′N, 97°39′E, young forest, light gap, 350 m, 1.–31.i.1990, 1 J, Malaise trap, D. C. Darling, IIS 900001 ( MBBJ). SULAWESI UTARA: Dumoga Bone N.P., “1440 camp”, 30.vi.–25.vii.1985, Malaise trap, 3JJ 1♀ ( BMNH) . PAPUA NEW GUINEA: MADANG PROVINCE: Hapurpi village, near Halopa mission, 700 m, primary rain forest, January 2001, 3 JJ, Malaise trap, Ch. Amari & V. Novotný leg. ( JSOC) .

Description of female. Similar to male, except for antennae and terminalia. All flagellomeres simple, about as long as broad ( Fig. 19 ). Abdomen slightly darker in comparison with male. Terminalia as in Fig. 18 . Cercus I about 2.5 times as long as cercus I. Gonocoxite 8 slightly tapering from lateral view.

Comments. Only the holotype collected at Fraser’s Hill (Peninsular Malaysia) was previously known. The above mentioned records show that it is a common and widespread species from Thailand to Papua New Guinea. Female antenna and terminalia are figured here for the first time. This species distinctly differs from the other currently known species of Chalastonepsia , mainly in the peculiar structure of the male antennae (flagellomeres with long setae and stalk-like apical part, as in some Cecidomyiidae ), short stem of Cu-fork and small gonostyli without the apical comb of thick setae. It could thus be well placed in a separate genus but we prefer to leave this for careful phylogenetic analysis of the Metanepsiinae and Gnoristinae (including all the tropical taxa hitherto referred to as Dziedzickia Johannsen, 1909 ), which is beyond the scope of this paper.

Figures

Figs. 18–19. Chalastonepsia orientalis Søli, 1996, female (Thailand, Mae Wong NP). 18 – terminalia; 19 – five basal segments of antenna in lateral view. Scale bar: 0.1 mm.