Four forms are recognized by (Martin & Lee 1984), mainly on the basis of larval polytene chromosome banding patterns. A fifth form, noted by D.H.D. Edward (unpubl.), occurs in Western Australia
No means of reliably distinguishing the adults is known. However, the type specimen is a large adult and similar large adults were collected near the large central lakes, and these were associated with a single larval type, therefore called form oppositus (o).
The other forms are:
form connori (c)
form tyleri (t)
form whitei (w) - results for this form suggest that it may be a composite of several other more or less differentiated forms.
form 'edwardi' (e)
Found: Australian Capital Territory - Acton (w).
New South Wales - Barmah Ferry (w); Boggy Swamp Creek, n & e. Putty (w); 13 Km s. Bombala (w); Colo (w); Station Creek, Delegate (w); Lake Eucumbene (t); 30 Km n. Holbrook (w); Jeir Creek (w); Kiandra (c, o, t, w); Macquarie Pass (w); 3 Km s. Nowra (w); Tarago Swamp (w); 13 Km n. Tooma Dam (w or c).
South Australia - Kangaroo Island: Kingscote (w). Barmera (o); Lake Leake (o) and Lake Edward (o, t), via Kalangadoo; Warren Gorge, n. Quorn (w).
Tasmania - Flinders Island - Babel Farm, Lackrana (t); Mt. Strezleckie (w); Ranga (t): King Island - Mt. Stanley (t); 3-tree Lagoon (t); Pearshape Lagoon (t); Porky Lagoon (o); Sea Elephant River (c): Arthur River (c, t); Bakers Beach (w); Bellerive (c, o, t); Bicheno (c); Blackmans Lagoon (t); Butler Island, Gordon River (o); Cambridge (o, t); Campbelltown (o, t); Coles Bay (o); Fossey River (c, w); George Town (c, o); Geeveston (o); Ida Bay (c, o, w); Lake Crescent (o); Lake Dulverton (t); Little Swanport (o, t); Longford (t); Manning River, Sandy Bay (w); Maydena (c); 15 Km Queenstown (c, o, t); Smithon (c, o, w); Strahan (t); Swansea (c, o); Whites Lagoon, Tunbridge (t); Wynyard (c).
Victoria - Anglesea (o, t); Armadale (w); Cumerland River (w); Longlea (w); Eildon (w); Elphinstone (c, w); Frankston (w); Horden Vale (t, w); Manns Beach (o, t); Moggs Creek (c, o, t, w); Narbethong (w); North Balwyn (o); Orbost (o); w. Orbost (o); Parker Road, Cape Horn (w); Reedy Creek (c, o); nr. Sale (o); Sassafras (w); Vermont (w); Warrandyte (c, o, w); West Preston (w); Squeaky Beach (c, t, w) and Derby River (t), Wilsons Promontory.
Western Australia - Lake Gwellup (e).