Polymorphanisus ocularis Ulmer, 1906

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 : 691-692

Polymorphanisus ocularis Ulmer, 1906

( Figs. 197 , 214–216, 230)

Polymorphanisus ocularis Ulmer, 1906: 60 [Lectotype female; Java; RMNH]; Barnard, 1980: 100 (redescription).

Polymorphanisus indicus Banks, 1911: 105 [Holotype female; India; MCZ; synonymised by Barnard, 1980: 100].

Diagnosis. Male. Antennae 23 mm in length. Antennal flagellum light brown with darker striations. Forewing 17 mm with two brown spots and hind wing 8 mm in length ( Fig. 197 ). Mesoscutum and mesoscutellum without evident markings like P. astictus ( Fig. 183 ). Tibial spurs 1.3.2.

Male genitalia. Inferior appendages unsegmented, broad at middle and narrow at apex (Fig. 214). In dorsal view, segment IX square-shaped almost covering segment X; segment X bifid ( Fig. 230 ).

Female. Antennae 20 mm in length. Antennal flagellum same colouration as male. Forewing and hind wing length same as male. Mesoscutum and mesoscutellum same as male, without evident markings ( Fig. 183 ). Tibial spurs 1.3.2.

Material examined. Indonesia: 1 female, Sumatra, Dolok Merangir , coll. E.W. Diehl, 1–5 May 1972 (HMPC) ; Laos: 1 female, Central Ban Phabat , coll. C. Holzschuh, 27 April–1 May 1997 (HMPC) ; Thailand: 1 male, Ton Nga Chang , coll. H. Malicky, 4–5 May 1993 (HMPC) ; 1 male, Sakon Nakhon Province, Nam Phung , coll. C.J. Uy, 20 May 2015 ( UPLBMNH) .

Distribution. Borneo, Burma, Java, Sumatra, Laos, Malaysia (Johor), Sri Lanka, Thailand, Vietnam.

Figs. 202–225. Polymorphanisus male genitalia. 202–204, astictus ; 205–207, fuscus ; 208–210, muluensis ; 211–213, nigricornis ; 214–216, ocularis ; 217–219, quadripunctatus ; 220–222, scutellatus ; 223–225, unipunctus . Lateral view, 202, 205, 208, 211, 214, 217, 220, 223; Phallus, 203, 206, 209, 212, 215, 218, 221, 224; Phallus tip, 204, 207, 210, 213, 216, 219, 222, 225. Scale = 0.5 mm.

Remarks. This is the only Polymorphanisus species in Southeast Asia belonging to ocularis- group of Barnard (1980). This species can be distinguished by big eyes, brown forewing spots, and a tibial spur formula of 1.3.2. We provide redescription of this species based on our recent materials as the original description and redescriptions are less informative.

Figures

Figs. 193–201. Polymorphanisus male right fore- and hind wings. 193, astictus; 194, fuscus; 195, muluensis; 196, nigricornis; 197, ocularis; 198, quadripunctatus; 199, semperi; 200, scutellatus; 201, unipunctus. Scale = 5 mm (199 redrawn from Barnard, 1980).

Figs. 183–192. Polymorphanisus thorax. 183, astictus, ocularis male and female thorax; 16, fuscus male thorax; 184–185, fuscus female thorax; 186, muluensis male and female thorax; 187, nigricornis male and female thorax; 188, quadripunctatus male and female thorax; 189, semperi male and female thorax; 190, scutellatus male thorax; 191, scutellatus female thorax; 192, unipunctus male and female thorax. Scale = 2 mm (189 redrawn from Barnard, 1980).

Figs. 226–234. Polymorphanisus segment X of male genitalia. 226, astictus; 227, fuscus; 228, muluensis; 229, nigricornis; 230, ocularis; 231, quadripunctatus; 232, semperi; 233, scutellatus; 234, unipunctus. Scale = 0.5 mm (232 redrawn from Barnard, 1980).