You can register to GreenPhyl either by using a dedicated GreenPhyl account or by using your favorite OpenID account. In both cases, you need to choose a GreenPhyl user name that will appear if you share gene families. GreenPhyl user names can only contain alpha-numeric characters, spaces, underscores ("_") and dashes ("-"), they must contain at least 3 consecutive alphabetic characters, at most 32 characters and they can not contain the word "greenphyl".
Please also read GreenPhyl terms of service.