Macrostemum quinquepunctatum Banks, 1920

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 : 685

Macrostemum quinquepunctatum Banks, 1920

( Figs. 149–153 )

Macronema quinquepunctatum Banks, 1920: 354 [Holotype male; Philippines; MCZ].

Diagnosis. Male. Antennae 25 mm in length. Antennal flagellum yellowish with brown striations. Forewing 10 mm and hind wing 7 mm in length with five dark spots ( Fig. 149 ). Mesoscutum and mesoscutellum without evident markings. Tibial spurs 2.4.4.

Male genitalia. Inferior appendages two-segmented, harpago short and blunt ( Fig. 150 ). In lateral view, phallus with squarish apex ( Fig. 152 ). In ventral view, phallus with evident endothecal sclerite ( Fig. 153 ). In lateral view, segment X narrowing toward apex with setal wart at tip ( Fig. 150 ). Segment IX squarish. Segment X divided medially as shown in Fig. 151 .

Female. Antennae 25 mm in length. Antennal flagellum same as males. Forewing 10 mm and hind wing 7 mm in length. Mesoscutum and mesoscutellum without evident markings. Tibial spurs 2.4.4.

Material examined. Philippines: 33 males, 38 females, Sibuyan, Romblon Magdiwang, Pawala River , coll. R. Muller, 23–30 July 1986 (HMPC) .

Distribution. Philippines.

Remarks. The species was initially described as Macronema quinquepunctatum by Banks (1920) without the drawings of the genitalia. However, he noted that the species closely resembles M. fasciatum [= M. fastosum ], even though the harpago of the latter species is longer and the phalli and wing patterns of the species differ greatly.

Figures

Figs. 149–164. Macrostemum quinquepunctatum. 149, right forewing; Male genitalia: 150, lateral; 151, segment X dorsal; 152, phallus lateral; 153, phallus tip. Macrostemum seba. 154–155, right forewing; Male genitalia: 156, lateral; 157, segment X dorsal; 158, phallus lateral; 159, phallus tip. Macrostemum tonkinensis. 160, right forewing; Male genitalia: 161, lateral; 162, segment X dorsal; 163, phallus lateral; 164, phallus tip. Scale: 149, 154–155, 160 = 2 mm; 150–153, 156–159, 161–164 = 0.02 mm.