Hydrobiosella thurawal, Cartwright, 2010

Cartwright, David I., 2010, Studies of Australian Hydrobiosella Tillyard: a review of the Australian species of the Hydrobiosella bispina Kimmins group (Trichoptera: Philopotamidae), Memoirs of Museum Victoria 67, pp. 1-13 : 11-13

Hydrobiosella thurawal sp. nov.

Figures 32–34 , 48–49

Holotype. Male, New South Wales, Minnamurra Falls (about 34°38'S, 150°44'E),? 12 Aug 1967, N. Hynes and joint collector unknown ( NMV, T-20945).

Paratype. New South Wales. 1 male (specimen PT-580 figured) , 1 female (specimen CT-604 figured), Minnamurra Falls , W of Kiama, 25 Mar 1973, A. Neboiss ( NMV) .

Diagnosis. Hydrobiosella thurawal can be separated from other species in the group by small differences in segment X and the inferior appendages; segment X in lateral view, with apex not bulbous, curved slightly downwards; lateral lobes with apical hooks directed downwards and not outwards; inferior appendages with basal segment tapered strongly distally; harpago with ventral margin sharply angled at about 90 degrees, not dilated in distal half.

Description. Wings similar to those of H.arcuata ( Fig. 1 ), length of forewing: male 6.9–8.5 mm, female 8.7 mm. Forewing fork 2 long, length fork 2 about 1.6 times length of fork 1; length fork 3 about twice length footstalk; fork 4 length about 5.8 times length footstalk. Hind wing fork 1 with very short footstalk; fork 3 length about 2.4 times length of footstalk.

Male. Segment IX with small, shallow notch medially on distal margin (fig. 34). Segment X mesal lobe, with a pair of short hairs/bristles subapically, in lateral view slightly downturned distally (fig. 33); in dorsal view, narrowed subapically, very slightly bulbous apically (fig. 32), with a pair of pigmented lateral lobes, which terminate in small, downward projecting hooks (figs 32–33). Inferior appendages in lateral view, with basal segment length about 1.8 times maximum width, broadest near middle, tapered distally, harpago more slender, ventral margin sharply angled at about 90 degrees near middle (fig. 33).

Female. Genitalia typical of genus, with a small, shallow projection on sternite VIII mesodistally (figs 48–49).

Etymology. Thurawal — Australian Aboriginal name for the area around the type locality.

Remarks. Two males and one female specimen of Hydrobiosella thurawal have been collected from the type locality in central-eastern New South Wales (latitude 34°38'S).

Figures

Figures 26–34. Hydrobiosella spp. male genitalia in dorsal, lateral and part ventral views; 26–28, Hydrobiosella moorda sp. nov.; 26, dorsal; 27, lateral; 28, ventral, mesodistal margin of segment IX; 29–31, Hydrobiosella woonoongoora sp. nov.; 29, dorsal; 30, lateral; 31, ventral, mesodistal margin of segment IX; 32–34, Hydrobiosella thurawal sp. nov.; 32, dorsal; 33, lateral; 34, ventral, mesodistal margin of segment IX.

Figures 35–49. Hydrobiosella spp.; 35–37, Hydrobiosella yokunna sp. nov. male genitalia in dorsal, lateral and part ventral views; 35, dorsal; 36, lateral; 37, ventral, mesodistal margin of segment IX; 38–49, Hydrobiosella spp. female genitalia (part segment VIII) in lateral and (segment VIII) ventral view; 38–39, Hydrobiosella unispina sp. nov.; 38, lateral; 39, ventral; 40–41, Hydrobiosella mundagurra sp. nov.; 40, lateral; 41, female genitalia, ventral; 42–43, Hydrobiosella bispina Kimmins; 42, lateral; 43, ventral; 44–45, Hydrobiosella arcuata Kimmins; 44, lateral; 45, ventral; 46–47, Hydrobiosella woonoongoora sp. nov.; 46, lateral; 47, ventral; 48–49, Hydrobiosella thurawal sp. nov.; 48, lateral; 49, ventral.

Figures 1–7. Hydrobiosella spp.; 1, Hydrobiosella arcuata Kimmins, wings; 2–7, Hydrobiosella spp., male genitalia in dorsal, lateral and part ventral views; 2–4, Hydrobiosella unispina sp. nov.; 2, dorsal; 3, lateral; 4, ventral, mesodistal margin of segment IX; 5–7, Hydrobiosella gurara sp. nov.; 5, dorsal; 6, lateral; 7, ventral, mesodistal margin of segment IX.