Key to Australian genera of Orchesellinae

1 Scales present, postantennal organ absent; ocelli present or absent............................................... 2

- Scales absent; postantennal organ present; ocelli present, 8+8..................................... Australotomurus

2 Ocelli reduced; dental spines present................................................. Heteromurus (Alloscopus)

- Ocelli present; dental spines absent...................................................................... 3

3 Antennal segment II subdivided; antennal segment III (apparent segment 5) and antennal segment IV (6) annulated; abdominal segment I with macrochaetae................................................................ Dicranocentrus

- Antennal segment II not subdivided; antennal segment III (4) not annulated; antennal segment IV annulated; abdominal seg- ment I without macrochaetae........................................................................... 4

4 Claw and empodial appendage broad; large S-shaped seta on dental lobe in males; marine littoral................................................................................................. new genus near Dicranocentrus *

- Claw and empodial appendage not unusually broad; without S-shaped seta on base of manubrium in males; terrestrial...................................................................... Heteromurus (Heteromurus) ( H. major only)