The Aranda Class and Skin System.
To really understand Aboriginal communities it is necessary to understand the great kinship subdivisions, called classes or “skins”. There are eight different skin groups, and there are important rules which control not only who can marry who, but even how individuals should relate to each other, how food is distributed between people, even down to which person can talk to which person.
The Aranda Tribal Group from central Australia is presented as a case study, but similar systems occur across Australia.
This is described in detail by Pastor Albrecht in the Kinship section of Rilipherra (down load complete PDF)
And also in my notes (down load complete PDF)
If the diagram on the right looks too intimidating, below are four "Power Point" presentations that may just help. Click through the presentations using the forward and back arrows.