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 jibboor sp. nov. Figures 11–13 Holotype . Male (specimen CT-611 figured). Victoria , Mt Buller , headwaters Chalet Ck , 1400 m (about 37°10'S , 146°25'E ), 19 Mar. 1993 , I. Campbell ( NMV , T- 21437). Diagnosis . Males of Hydrobiosella jibboor can be separated from those of other species in the group by the dorsal ‘raised ridge’ sub-apically on segment X and rounded apex and segment IX with almost straight distal margin. Description . Wings similar to those of H. bandabanda ( Fig. 1 ), length of forewing: male 6.9 mm . Male . Segment IX with a weak notch in meso-ventral margin ( Fig. 13 ), and with an almost straight distal margin ( Fig. 12 ). Segment X in dorsal view, a ‘tongue-shaped’ process, with almost parallel sides in basal third, with a pair of very small knobs baso-laterally, tapered distally to a rounded apex, length about 2.3 times width, without a central dorsal ridge or groove ( Fig. 11 ); in lateral view tapered slightly in basal two thirds, slightly bulbous sub-apically with a small dorsal ‘raised ridge’ ( Fig. 12 ). Phallus generally tube-like, robust, with a pair of narrowly separated sub-apical spines, with two more spines basally ( Figs 11, 12 ). Inferior appendages in lateral view, robust, with basal segment sub-rectangular, length about twice maximum width; harpago shorter, length about half length basal segment, length about 1.6–1.7 times maximum width, with broad rounded apex ( Fig. 12 ). Female . Unknown. Etymology . Jibboor – Victorian Aboriginal word for mountain ( type locality — Mt Buller). Remarks . A single male specimen of Hydrobiosella jibboor has been collected from the type locality in north-eastern Victoria (latitude 37°10'S ).