The genus Stactobiella Martynov (Trichoptera, Hydroptilidae) in Japan Author Ito, Tomiko text Zootaxa 2020 2020-03-09 4748 3 561 571 journal article 10.11646/zootaxa.4748.3.9 75d37244-7649-49b9-b6f8-f603c61005b8 1175-5326 3815024 850379E4-B780-4D14-9B4B-9F753849D51B Genus Stactobiella Martynov Stactobiella Martynov 1924 , 37, 56. Type species: Stactobiella ulmeri Siltala , by monotypy. Adults (modified from Marshall 1979 and Zhou et al . 2016 ) Length of each anterior wing 1.5–3.0 mm. Head: Postoccipital lobes oval or ellipsoidal, ocelli 3. Mesoscutellum lozenge-shaped with horizontal line. Metascutellum wide, short, subquadrate. Tibial spur formula 1, 3, 4. Male genitalia: Segment VIII unmodified; segment IX well developed with long anterior apodemes; tergite X membranous or absent; subgenital plate and inferior appendages variable in species; aedeagus simple, tubular, with fused lateral processes in some species. Habitat . Adults of most species are found near streams with stony substrata. Japanese name . Sawa-himetobikera-zoku.