What is meant by the term "co-parceners" ?

 Co-parceners in a HUF, are only those maleswho are within 4 degrees in lineal descendent from the common male ancestor. The relevance of concept of coparcenary is that only coparceners can ask for partition. The other male/female family members; i.e, other than coparceners in a HUF, have no direct claim over HUF property, but can claim only through the coparceners.