Two further species groups and new species among Australian Hydrobiosella Tillyard: new species from south-eastern Australia (Trichoptera: Philopotamidae) Author Cartwright, David I. 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 10.24199/j.mmv.2012.69.03 1447-2554 10666102 Hydrobiosella jirrima sp. nov. Figures 14–16 , 41 Holotype . Male. Victoria , McKay Ck , Sassafras Gap (about 36°37'S , 147°47'E ), 2 Feb. 1974 , A. Neboiss ( NMV , T- 21438). Paratypes . Victoria . 3 males (specimen CT-586 figured), collected with holotype ; 5 males , 1 female (specimen CT-613 figured), Sassafras Gap , 13 Feb 1963 , A. Neboiss ; 1 male , Gibbo R., S of Donovan Ck jn, 3 Feb 1974 , A. Neboiss ; 1 male , roadside trickles, 1.2km N Sassafras Gap , lt tr., 11 Feb 2010 , R. StClair and D. Cartwright ( NMV ) . Diagnosis . Males of Hydrobiosella jirrima can be distinguished from those of other species in the group by the absence of a short dorsal ‘raised ridge’ subapically and slender apex on segment X. Description . Wings similar to those of H. bandabanda ( Fig. 1 ); length of forewing, male 6.6–7.8 mm , female 6.6 mm . Male . Segment IX with a weak wide notch in meso-ventral margin ( Fig. 16 ), and an almost rounded distal margin ( Fig. 15 ). Segment X in dorsal view, a ‘tongue-shaped’ process, with almost parallel sides in basal quarter, with a pair of very small acute knobs baso-laterally, tapered distally to a narrow apex, without a central dorsal ridge or groove ( Fig. 14 ); length about 1.9 times width; in lateral view weakly broad-based, tapered slightly in basal two thirds, very slightly bulbous apically ( Fig. 15 ). Phallus generally tube-like, robust, with a pair of narrowly separated sub-apical spines ( Figs 14, 15 ). Inferior appendages in lateral view, robust, with basal segment sub-rectangular, length about 2.3 times maximum width; harpago shorter, length about 0.6 times length basal segment, length about twice maximum width, with broad rounded apex ( Fig. 15 ). Female . Genitalia typical of genus, with a small projection on sternite IX meso-distally ( Fig. 41 ). Etymology . Jirrima – Australian aboriginal word for a mountain ( type locality Sassafras Gap). Remarks . Eleven males and one female of Hydrobiosella jirrima have been collected from three sites near the type locality in north-eastern Victoria (latitudinal range 36°37'- 36°39'S ).