The women's sevens player of the year will miss round two in which the Australian side will try to claw back the series lead from the US, who they trail by two points.

With Caslick sidelined, two teenage debutants have been added to the squad.

Queenslander Georgia Hannaway and Faith Nathan from NSW will take to the field when the tournament begins on December 5.

The duo have risen through the ranks of the Aon University Sevens Series, and impressed selectors with their performances at the Oceania Sevens Championship in Fiji earlier this month.

"Georgia and Faith have worked incredibly hard during the pre-season and we saw what they are capable of on the World Stage at the Oceania Sevens," women's sevens head coach John Manenti said in a statement.

"Fast, creative and agile, both players have really made a mark for themselves in this squad and we're looking forward to seeing their development continue in the next round."

In pool B, the Australians will face off against Fiji on December 5, then Ireland and Spain the following day.

The US leads the pack on 20 points, Australia are second on 18 and New Zealand third with 16.

AUSTRALIA SQUAD:

1. Shannon Parry, University of Sydney, Queensland - 26 caps

2. Sharni Williams (c), University of Canberra, Canberra - 31 caps

3. Sariah Paki, University of Technology Sydney, NSW - 6 caps

4. Cassandra Staples, University of Queensland, NSW - 8 caps

5. Emma Tonegato, University of Western Australia, NSW - 26 caps

6. Evania Pelite, University of Adelaide, Queensland - 25 caps

7. Georgia Hannaway*, University of Queensland, Queensland

8. Madison Ashby, University of Technology Sydney, NSW - 1 cap

9. Faith Nathan*, University of Technology Sydney, NSW

10. Alicia Lucas, University of New England, NSW - 30 caps

11. Rhiannon Byers, University of New England, NSW - 2 caps

12. Ellia Green, University of Melbourne, Victoria - 26 caps

*Denotes uncapped

Australian Associated Press