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 bandabanda sp. nov. Figures 1, 2, 2a, 3, 3a, 4, 4a , 38, 38a Holotype . Male. Victoria , Toorongo Falls , 7 km NE of Noojee , (about 37°51'S , 146°00'E ), 27 Nov 1981 , J. Morse & A. Neboiss ( NMV , T- 21392). Paratypes . Victoria . 4 males (specimen CT-593 figured) , 1 female (specimen CT-594 figured), collected with holotype ; 7 males (specimen PT-581 figured), 2 females (specimen CT-612 figured), Newlands Ck , Upper Thomson R. (about 37°37'S , 146°10'E ), 26 Feb 1978 , TR Survey ( NMV ) . Other material examined . Victoria . 2 males , Falls Ck Ski Village , 26 Mar 1957 , A. Neboiss ; 1 male , Cumberland Falls , SE of Marysville , 7 Jan 1971 , A. Neboiss ; 1 male , Baw Baw Ski Village , 4900 ft , 8 Jun 1974 , J.C .; 1 male , Cement Ck , Mt Donna Buang Rd , 3 Mar 1980 , J. Dean ?; 1 male , small ck 1 km N Rum Ck , 9 Nov 1983 , D. Cartwright ( NMV ) . Diagnosis . Males of Hydrobiosella bandabanda can be distinguished from those of other species in the group by a central dorsal ridge or groove with a pair of lateral acute processes on segment X. Description . Wings typical of the genus ( Fig. 1 ), similar to those of H. bispina ( Cartwright, 2010 , fig. 1). Length of forewing; male 6.7–9.1 mm , female 7.2–9.3 mm . Male . Segment IX with a shallow, wide V-shaped notch medially on distal margin ( Figs 4, 4a ). Segment X in dorsal view, a ‘tongue-shaped’ process, with sides almost parallel, a pair of small knobs baso-laterally, tapered distally and with a central dorsal ridge or groove bearing a pair of lateral acute processes ( Figs 2, 2a ), length about 3-3.5 times width; in lateral view broad-based, slightly curved ( Fig. 3 ), or straight ( Fig. 3a ) slender in middle, usually slightly dilated distally with a sub-apical ‘knob’ ( Fig. 3 ), sometimes without ‘knob’ ( Fig. 3a ). Phallus generally tube-like, robust, with a pair of sub-apical spines and two smaller spines basally ( Figs 2, 2a, 3, 3a ). Inferior appendages in lateral view, with basal segment broadest near middle, length about twice maximum width; harpago shorter, length about half length basal segment, more slender, length about twice maximum width, apex broadly rounded ( Figs 3, 3a ). Female . Genitalia typical of genus, with a small acute projection on sternite IX meso-distally ( Figs 38, 38a ). Etymology . Bandabanda – Australian aboriginal word for split or broken open (dorsal groove on segment X). Remarks . Hydrobiosella bandabanda shows slight variation among the 21 specimens collected from 7 localities in eastern-central and north-eastern Victoria (latitudinal range 36°52'– 37°51'S ).