Stactobiella

Zhou, Lei, Yang, Lian-Fang & Morse, John C., 2016, New species of microcaddisflies from China (Trichoptera: Hydroptilidae), Zootaxa 4097 (2), pp. 203-219 : 209-210

Stactobiella MARTYNOV

Stactobiella MARTYNOV 1924, 37, 57; type species: Stactobia ulmeri SILTALA 1908 (monobasic) [a synonym of Microptila risi FELBER 1908, 14–16, synonymized by SPURIS 1989, 12]

The genus Stactobiella currently consists of 13 described species occurring in the East Palaearctic (4 species), the Western Palaearctic (2 species), the Nearctic (5 species), and the Oriental (2 species) Regions (MORSE 2015). XUE & YANG 1990 described Stactobiella pulmonaria from China (Hainan island), but MALICKY & CHANTARAMONGKOL (2007) transferred the species to Chrysotrichia , based on his specimens from Thailand and Laos, and he synonymized Chrysotrichia tanduk WELLS & HUISMAN 1993 ( Malaysia) with this species. We reexamined the type specimens of S. pulmonaria and agree with the opinion of WELLS & HUISMAN (1993), the typical 1-3-4 tibial spur formula suggested that our species should be placed in Stactobiella , but the male genitalia are typical of Chrysotrichia . Therefore, the species Chrysotrichia pulmonaria (XUE & YANG 1990) became the first species of that genus known in China. In this study, two new species, Stactobiella mutica n. sp. and Stactobiella parallelica n. sp., have been found in Oriental China and Stactobiella biramosa from northern China (Hei-long-jiang) is new to the Chinese fauna.

Stactobiella species have forewings that are ~1.5–3.0 mm; 3 ocelli; the metascutellum is long, as wide as or slightly narrower than the metascutum; the spur formula is 1-3-4. Stactobiella male genitalia have segment IX well developed with long anterior apodemes, tergum X is membranous, the shape of the inferior appendage varies among species, the subgenital is plate strongly sclerotized, arched; the aedeagus is a single tubule in most species (diagnosis modified from MARSHALL 1979).