Why is IgD found on lymphocyte membranes if B cells produce antibodies?

[sinjan.j]

"It's found mainly on the plasma membrane of lymphocytes and probably act as antigen receptors."

that is what is written in my textbook on IgD antibody.

I just read the basic concept of antibody. According to what I've read, the B lymphocytes produce plasma cell which ultimately gives rise to antibodies. This concept when applied in case of IgD doesn't really make much sense to me.

Please explain.

 

[Ryan_m_b]

B-lymphocytes go through many developmental stages. At the final stage you have mature B-lymphocytes that express IgD on their surface. Plasma cells are mature, terminally differentiated B-lymphocytes.