Hydrobiosella Tillyard, 1924

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 : 2

Hydrobiosella Tillyard

Hydrobiosella Tillyard 1924: 288 ; Mosely and Kimmins 1953:

387; Neboiss 1977: 45.

Type species. Hydrobiosella stenocerca Tillyard by monotypy.

Generic descriptions are given by Tillyard (1924: 288), Mosely and Kimmins (1953: 387) and Neboiss (1977: 45).

Key to males of known Australian groups (or ungrouped species) of Hydrobiosella Tillyard

1. Phallus without pair of parameres ( Neboiss 1986, figs pp. 99; H. amblyopia , 101; H. armata , H. tasmanica , 102; H. orba , H. corinna ) 2

– Phallus with pair of parameres ( Neboiss 1986, figs pp. 99; H. michaelseni , H. waddama , 101; H. letti , 102; H.bispina , 103; H. arcuata ) 4

2. Preanal appendages present, usually small ( Neboiss 1977, figs 204–211; Neboiss 1986, figs p. 102 H. orba , H. corinna ; Neboiss 2003, figs 8a–h); Tas H. corinna group

– Preanal appendages absent ( Neboiss 1986, figs pp. 99 H. amblyopia , 101 H. armata , H. tasmanica ) 3

3. Phallus apically with downward projecting spine(s) ( Neboiss 1977, figs 216–221, 225, 226; Neboiss 1986, figs p. 101 H. armata , H. tasmanica ; Neboiss 2003, figs 10a–g, 11a–g, 12a–f); Tas H. tasmanica group

– Phallus apically without downward projecting spine(s) ( Neboiss 1982, fig. 12; Neboiss 1986, figs p. 99 H. amblyopia ); S-WA H. amblyopia (ungrouped)

4. Inferior appendages with harpago with dark row of setae forming fringe along ventral margin (figs 2–4; Neboiss 1986, figs pp. 102 H.bispina , 103 H. arcuata ); E-Vic, E-NSW, E-Qld Hydrobiosella bispina group

– Inferior appendages with harpago without dark row of setae forming fringe along ventral margin ( Neboiss 1986, figs pp. 99 H. michaelseni , H. waddama , 101 H. letti ) 5

5. Parameres elongate and sinusoidal, attached ventrally to base of phallus ( Neboiss 1977, fig. 233; Neboiss 1986, figs p. 99 H. waddama ; Neboiss 2003, figs 12g, h); Tas, SE Aust. H. waddama (group — only one species described)

– Parameres not elongate and sinusoidal, not attached ventrally to base of phallus ( Neboiss 1982, figs 9, 10; Neboiss 1986, figs pp. 99 H. michaelseni , 101 H. letti ) 6

6. Parameres curved strongly and crossed ( Neboiss 1982, figs 9, 10; Neboiss 1986, figs p. 99 H. michaelseni ); S-WA H. michaelseni (ungrouped)

– Parameres not curved strongly and crossed ( Neboiss 1986, figs p. 101 H. letti ); CE-NSW H. letti (ungrouped)