Pseudoleptonema supalak Malicky & Chantaramongkol, 1998

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 : 696

Pseudoleptonema supalak Malicky & Chantaramongkol, 1998

( Figs. 245–249 )

Pseudoleptonema supalak Malicky & Chantaramongkol (in Malicky, 1998b): 780 [Holotype male; Thailand; HMPC]; Hoang et al., 2005: 172 (redescription).

Diagnosis. Male. Antennae 23 mm in length. Antennal flagellum light brown with darker striations. Forewing 11 mm and hind wing 8 mm in length. Mesoscutum and mesoscutellum without evident markings. Tibial spurs 1.4.4.

Male genitalia. Inferior appendages two-segmented. In lateral view, phallus with round apex ( Fig. 248 ) and with large opening in ventral view ( Fig. 249 ). Segment X with broad apex in lateral view ( Fig. 246 ) and medially separated in dorsal view ( Fig. 247 ).

Female. Antennae 15 mm in length. Antennal flagellum same colouration as male. Forewing 7 mm and hind wing 6 mm in length. Mesoscutum and mesoscutellum same as male. Tibial spurs 1.4.4.

Type material examined. Holotype. Thailand: 1 male, Pranlaeng, coll. H. Malicky, 22 September 1996 (HMPC).

Paratypes. Thailand: 6 males, 1 female, Pranlaeng, coll. H. Malicky, 22 September 1996 (HMPC) .

Additional material examined. Thailand: 10 males, 10 females, Lampang Province Chaeson National Park , coll. H. Malicky, 25–26 May 2005 (HMPC) .

Distribution. Thailand, Vietnam.

Remarks. The wing patterns of the P. supalak specimens were consistent, with a white V-shaped mark on the forewing ( Fig. 245 ). However, this pattern is also observed in some P. erawan specimens. In such cases, specimens can be identified based on the structure of the phallus and segment X. The body of P. supalak is also narrower than that of P. erawan , and P. supalak possesses an obvious flap on the edge of its forewing.

Figures

Figs. 235–257. Pseudoleptonema erawan. 235, right forewing; Male genitalia: 236, lateral; 237, segment X dorsal; 238, phallus lateral; 239, phallus tip. Pseudoleptonema sinuatum. 240, right fore- and hind wing; Male genitalia: 241, lateral; 242, segment X dorsal; 243, Phallus lateral; 244, Phallus tip. Pseudoleptonema supalak. 245, right fore- and hind wing; Male genitalia: 246, lateral; 247, segment X dorsal; 248, phallus lateral; 249, phallus tip. Pseudoleptonema quinquefasciatum. 251, right fore- and hind wing; Male genitalia: 252, lateral; 253, segment X dorsal; 254, phallus lateral; 255, phallus tip; 256, Head dorsal. Pseudoleptonema tansoongnerni. 257, right forewing. Scale: 235, 240, 245, 251, 257 = 2 mm; 236–239, 241–244, 246–249, 252–255 = 0.02 mm; 256 = 0.5 mm.