1. a School of Geosciences, Monash University , Clayton , VIC , 3800 , Australia E-mail:
2. b Department of Earth and Marine Sciences , ANU , Canberra , ACT , 0200 , Australia
3. c Queensland Museum Geology and Palaeontology , 122 Gerler Road, Hendra , QLD , 4011 , Australia
4. d Geological Survey of Queensland, Department of Employment, Economic Development and Innovation , 80 Meiers Road, Indooroopilly , QLD , 4068 , Australia
5. e Department of Paleobotany , Swedish Museum of Natural History , Box 50007, S-104 05 , Stockholm , Sweden E-mail:
6. f 69 Kilkivan Avenue, Kenmore , QLD , 4069 , Australia