A Crested Palm

I am not expert on palm trees although I am responsible for quite a few of them in at our SJC home, but I do know an anomaly when I see one! I don't know what type of palm this is, but it is definitely sporting a mutation known as a crest or fasciation. Basically what this means is the plant cells that normally grow up at the growing tip of the plant, start to grow sideways instead, creating a crest at the top of the plant. It is most often seen in succulents and cactus, but can happen in almost any plant that grows from the top. Scientists are not sure why this occurs, but suspect it may be the result of a virus or insect infestation. It doesn't really hurt the plant and this palm one seems very healthy. Just different!