Hydroptila spinosa Arefina & Armitage 2003

• Main Authors: Ito, Tomiko, Ohkawa, Ayuko, Hattori, Toshio
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2011
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Insecta; Trichoptera; Hydroptilidae; Hydroptila; Hydroptila spinosa; Sakhalin
• Online Access: https://doi.org/10.5281/zenodo.6190655; http://treatment.plazi.org/id/9359FE437A742C4FFF30FC07AA75F844

Hydroptila spinosa Arefina & Armitage, 2003 (Figs. 7, 14 D) Hydroptila spinosa Arefina & Armitage, 2003, 15–16, figs. 1–2, male, female, Russian Far East (Sakhalin); Ito et al ., 2010, 65, Japan (Hokkaido). Adult . Wings dark brown with several small lighter markings. Antennae brown with no darker markings. Male . Lengths of forewing, hindwing and body 2.6–2.8 mm, 2.3–2.5 mm and 2.5–2.6 mm, respectively (n=5). Antennae 32–35-segmented; length 1.3–1.5 mm (n=5). Ventral process of sternite VII elongate, expanded in distal half, apex jagged. Segment VIII with pair of large setal patches ventrally. Segment IX with rounded antero-lateral apodemes, and lateral processes; processes directed latero-caudad, apically subacute. Dorsal plate transparent, semicircular in dorsal and ventral views, in lateral view subtriangular with subacute apex; median section membranous with several thick spines ventrally. Subgenital plate membranous, bilobed, distinctly shorter than dorsal plate. Phallic apparatus long, straight; subapical process slender, shorter than phallus and slightly curved mesad at apex. Inferior appendages strongly sclerotized, rod-shaped each with conspicuous seta subapically and several thin short setae apically; narrow in ventral view and strongly diverging. Female . Lengths of forewing, hindwing and body 2.6–3.0 mm, 2.0– 2.7 mm and 2.9–3.5 mm, respectively (n=5). Antennae 25–27-segmented; length 0.9–1.0 mm (n=5). Abdominal segments pale. Sternite VI with small ventral process. Segment VIII tergite and sternite indistinct, 3 pairs of long subapical setae ventrally and pair of setae dorsally; ventral sclerite dark and conspicuous, lozenge-shaped in ventral view, bearing numerous very fine spines on surface (visible under 400 magnification). Bursa copulatrix lozenge-shaped. Specimens examined . Hokkaido : 2 males, 2 females, Shibecha-cho, Kayanuma, Shirarutoro-etoro-gawa, Tomi-bashi, 16.VII.2009, TI, L; 222 females, Shibecha-cho, Kayanuma, Shirarutoro-etoro-gawa, 17 m, 16.VII.2009, TI, P; 1 male, 3 ...