Two further species groups and new species among Australian Hydrobiosella Tillyard: new species from south-eastern Australia (Trichoptera: Philopotamidae) Author Cartwright, David I. 13 Brolga Crescent, Wandana Heights, Victoria 3216, Australia cartwright@hotkey.net.au text Memoirs of Museum Victoria 2012 2012-12-31 69 245 258 https://museumsvictoria.com.au/collections-research/journals/memoirs-of-museum-victoria/volume-69-2012/pages-245-258/ journal article 292015 10.24199/j.mmv.2012.69.03 520984e9-5579-42e7-9013-1786e6df5abe 1447-2554 10666102 Hydrobiosella bandabanda group Diagnosis . Key characters of males in the group are phallus without parameres but with two or more embedded spines subapically and preanal appendages absent. Description . Head and nota dorsally brown to dark brown with pale setal warts and scutellum, abdomen brownish dorsally and ventrally, paler laterally; wings light brown to brown. Medium-sized adults. Forewing length about 2.8–3.1 times maximum width, males: 5.9–9.8 mm ; females: 6.1–10.8 mm ; wing venation ( Fig. 1 ), similar to the type species H. stenocerca ( Mosely and Kimmins 1953 , fig. 265a), H. bispina ( Cartwright, 2010 , fig. 1) and H. waddama ( Mosely and Kimmins 1953 , fig. 269a), R1 simple, forks 1, 2, 3, 4 and 5 present; forks 1 and 2 sessile; fork 2 with nygma present, length about 1.3–1.4 times length fork 1; fork 3 shorter, length 0.7 times length fork 2, fork 3 length ranging from between 1.8–1.9 times length footstalk, cross-veins r-m and m contiguous at fork 3; fork 4 similar length to fork 3, fork length about 7 times length footstalk; fork 5 very long, length between 1.6–1.7 times length fork 4; discoidal cell closed, length between 3.7–3.8 times maximum width. Hind wing length about 2.4–2.5 times maximum width; forks 1, 2, 3 and 5 present; forks 1 and 2 sessile; fork 2 with nygma, length fork 2 between 1.4–1.5 times length fork 1; fork 3 shorter, length about 0.6 times length fork 2, fork 3 slightly longer than footstalk, length fork ranging between 1.3–1.4 times length footstalk; fork 5 very long, length between 1.8–1.9 times length fork 3; discoidal cell closed, length between 4.0–4.1 times maximum width; with three longer anal veins ( Fig. 1 ). Male . Segment IX with a shallow, wide V notch medially on distal margin ( Figs 4, 7 , 10 ). Preanal appendages absent. Segment X mainly sclerotised, dorso-ventrally compressed; in dorsal view, with a ‘tongue-shaped’ process, tapered distally, rows of fine hairs meso-laterally and usually a pair of small knobs baso-laterally ( Figs 2, 5 ). Phallus generally robust, tube-like, with a pair of spines sub-apically, sometimes with one or two spines more basally ( Figs 2, 3, 5, 6 ). Inferior appendages with two segments, in lateral view, basal segment usually more robust and longer than harpago. Harpago has a small field of dark spines meso-distally ( Figs 3, 6 ). Female . Genitalia typical of genus with a small projection on sternite IX mesodistally ( Figs 38-41 ). Larva . Confirmed larvae are known for H. bandabanda . These larvae match Hydrobiosella sp. AV2 ( Cartwright, 1997 ). The diagnostic features are head wide and angular laterally, and forecoxa with two sclerotised processes on anterior margin, one longer than the other ( Cartwright, 1997 , fig. 1.3). Hydrobiosella sp. AV 2 larvae are recorded mainly from riffle habitats of very small to medium-sized streams between 0.4-8 m wide at moderate to high altitudes between 800-1460 m ( Suter et al. 2006 ). Key to males of species of the Hydrobiosella bandabanda group from Australia 1. Segment X dorsally with a central ridge bearing pair of acute lateral processes ( Figs 2, 2a ); EC-Vic H. bandabanda - Segment X without a central dorsal ridge ( Figs 5 , 8 ) 2 2. Segment X with sub-apical spine ( Fig. 6 ); E-Vic H. tiarka - Segment X without apical spine ( Figs 9, 12 ) 3 3. Segment X in lateral view with apical half slender, not dilated apically; inferior appendages with terminal segment dilated slightly in apical half ( Fig. 9 ); NE-Vic H. tarrong - Segment X in lateral view with apical half robust, dilated apically; inferior appendages with terminal segment not dilated in apical half ( Figs 12, 15 ) 4 4. Segment X with a dorsal ‘bump’ subapically ( Fig. 12 ); NE-Vic H. jibboor - Segment X without a dorsal ‘bump’ subapically ( Fig. 15 ); NE-Vic H. jirrima