Aethaloptera sexpunctata Kolenati, 1859

Uy, Christine Jewel C., Malicky, Hans & Bae, Yeon Jae, 2018, Review of the filter-feeding caddisfly subfamily Macronematinae (Trichoptera: Hydropsychidae) in tropical Southeast Asia, Raffles Bulletin of Zoology 66, pp. 664-703 : 666

Aethaloptera sexpunctata Kolenati, 1859

( Figs. 1–7 )

Setodes sexpunctata Kolenati, 1859: 266 [Holotype male; India;

NHMW]. Polymorphanisus sexpunctatus (Kolenati) Brauer, 1868: 263 . Aethaloptera sexpunctata (Kolenati) Ulmer, 1907: 19 . Aethaloptera dyakana Banks, 1920: 354 [Holotype female; Borneo;

MCZ; synonymised by Ulmer, 1951: 194]. Paraethaloptera punctata Banks, 1938: 232 [Lectotype female;

Peninsular Malaysia; NHMUK; synonymised by Barnard,

1980: 75]. Aethaloptera punctata (Banks) Kimmins, 1962: 96 .

Diagnosis. Male. Antennae 26 mm in length with dark brown striations, colour of each antennal segment (from one striation to the next) half brown and half whitish ( Fig. 7 ). Forewing 9 mm and hind wing 4 mm in length ( Figs. 1, 2 ). Mesoscutum without evident markings. Mesoscutellum with pair of dark brown spots located anterolaterally ( Fig. 7 ) Tibial spurs 0.3.2.

Male genitalia. Inferior appendages two-segmented ( Fig. 3 ). Segment X in dorsal view bifid with each lobe connected half midway ( Fig. 4 ). Phallus in lateral view bending almost 120° measured from central axis of the base of phallus to central axis of the shaft at 2/3 length recurving dorsally ca. 90° toward apex ( Fig. 5 ). In lateral view, phallus apex forming knob-like structure, in dorsal view forming two rounded heart-shaped lobes ( Fig. 6 ).

Female. Antennae 30 mm in length. Antennal flagellum brown with darker striations. Forewing 10 mm and hind wing 8 mm. Mesoscutum and mesoscutellum without evident markings. Tibial spurs 0.3.2.

Material examined. Thailand: 3 males, Sakon Nakhon Province, Nam Phung , coll. C.J. Uy, 20 May 2015 ( UPLBMNH) ; 1 female, Mae Hong Son, Ban Huai Hia , coll. H. Malicky, 15 April 2000 (HMPC) ; Indonesia: 2 females, Sumatra, Palembang , coll. H. Malicky, 13 May 1972 (HMPC) ; India: 4 males, Kherani Mokam , coll. F. Schmid, 3 May 1960 ( CNC) .

Distribution. India, Burma, Thailand, Laos, Vietnam, Cambodia, Malaysia (Johor), Sri Lanka, Sumatra, Borneo, New Guinea, Northern Australia.

Remarks. Kolenati (1859) originally said that brown spots were present on the posterior cubitus, arculus, and thyridium of each forewing, with a total of six spots on both forewings, thus inspiring the specific epithet sexpunctata . In the specimens examined here, the brown spots were more numerous and included a very evident humeral spot at the edge of the costa ( Fig. 1 ).

Figures

Figs. 1–7. Aethaloptera sexpunctata. 1, forewing; 2, hind wing; Male genitalia: 3, lateral; 4, segment X dorsal; 5, phallus lateral; 6, phallus tip; 7, Head dorsal. Scale bars: 1–2 = 2 mm, 3–6 = 0.25 mm, 7 = 1 mm.